JP2018033784A - Dowel pin for use in working model for dental technique, support base and plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dowel pin for use in a working model for dental technique in which gypsum is prevented from entering insertion holes of a support base and the wobble in the work when processing a tooth model can be prevented, and provide the support base and a plug capable of preventing entry of the gypsum to the insertion holes.SOLUTION: A metallic dowel pin is implanted in a fixing plate 106 where a tooth model is fixed and is formed of gypsum. A support base 102 is provided with insertion holes 18 and is formed of synthetic resin. The dowel pin is configured such that an upper body part 1 has a pillar shape or a truncated-cone-shape where an outer diameter is narrowed toward the tip direction, and a lower body part 2 has an outer diameter gradually decreasing toward the distal end, the lower body part that has an irregular substantially truncated cone shape where the some side surface is a flat surface extending in the longitudinal direction to a dowel pin distal end and has one or two side surfaces being the flat surface. The support base has insertion holes with the shape where the shape of the dowel pin insertion holes can be fitted to the upper body part and the lower body part of the dowel pin.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a dowel pin used in a dental work model used in dental treatment, a support base into which the dowel pin is inserted, and an insertion hole for inserting a dowel pin in the support base into the insertion hole in which the dowel pin is not inserted. It is related with the stopper for preventing that it invades.

  Generally, a dental technician work model used in dental treatment or the like includes a fixing plate to which a tooth model is fixed, a plurality of dowel pins implanted in the fixing plate, and a support base for supporting the fixing plate. And. A tooth model is fixed on the fixing plate (see, for example, Patent Document 1 and Patent Document 2). The support base is made of synthetic resin, and a plurality of insertion holes for inserting dowel pins and locking projections provided as necessary are provided on the upper surface of the support base. The insertion holes are arranged on the upper surface of the support base with a gap, and the locking projections provided as necessary are arranged on both sides or one side of the insertion hole. The fixing plate is formed of gypsum, and a locking recess for fitting the locking plate to the locking protrusion corresponding to the locking protrusion provided on the lower surface of the support base as necessary. Is provided. A combination in which a protrusion for locking provided as necessary is provided on the lower surface of the fixing plate and a recess for locking provided as required is provided on the upper surface of the support base may be used (hereinafter referred to as the case of the present invention). In some cases, the description may be omitted only with the former, but the latter may be used as a matter of course).

  The fixing plate is supported on the upper surface of the support base by inserting the dowel pin implanted in the fixing plate into the insertion hole of the support base. In this support state, when the locking protrusion of the support base and the locking recess of the fixing plate are provided, the locking protrusion and the locking recess are fitted to each other. . (Hereinafter, description will be made based on a preferred embodiment in which these locking protrusions and recesses are provided unless otherwise specified. In the present invention, as described later, locking protrusions and recesses are provided. Is not essential). Then, a predetermined part of the tooth model formed on the fixing plate was cut together with the fixing plate, and the cutting was performed in a state where the fixing plate to which the cut tooth model was joined was supported on the upper surface of the support base. A required operation (for example, production of a crown prosthesis) is performed using the tooth profile model. At this time, the shape of the crown prosthesis and the like is adjusted while taking care not to cause a sense of incongruity with the surrounding teeth, so the cut tooth model is inserted and removed several times from the support base. The shape of the prosthetic prosthesis or the like is adjusted (reference numeral 54 [0055] in FIG. 1 in Patent Document 1, reference numeral 74J [0085] in FIG. 19B, reference numeral 20 [0024] in FIG. 7 in Patent Document 2). ] Etc.).

  Except for the fixing base end fixed to the fixing plate, the dowel pin generally has a cross-sectional shape perpendicular to the longitudinal direction of the dowel pin and a cross-sectional shape perpendicular to the longitudinal direction of the insertion hole for inserting the dowel pin. The most commonly used type is a round section whose outer diameter is gradually narrowed toward the tip of the dowel pin.

  When the cut tooth model is inserted into the support base and its shape is adjusted, if the shape of the cross section perpendicular to the longitudinal direction is a dowel pin with a round cross section, rotation cannot be prevented. A fairly strict locking of the fixing plate as described in Japanese Patent No. 5690908, Patent No. 5750529 divided from the parent application for Patent Document 1, and Patent No. 5856664 divided from Patent Document 1 Unless the recess and the locking protrusion of the support base are designed to be fitted to each other, rotation and shaking cannot be prevented. That is, when the dowel pin has a round cross-section dowel pin and the support base dowel pin insertion hole also has a round cross-section, the support base made of synthetic resin is provided on the upper surface as described above for locking. On the lower surface of the fixing plate formed of the protrusion and the plaster, it is essential to provide a locking recess corresponding to the locking protrusion provided on the support base as necessary. If the dowel pin has a round cross-section dowel pin and the support base dowel pin insertion hole also has a round cross-section, it is assumed that the dowel pin is locked to the upper surface of the support base and to the lower surface of the fixing plate formed of gypsum. Even if the concave portion is provided, depending on the arrangement and shape, when the cut tooth model is inserted into the support base and the shape is adjusted, rotation cannot be sufficiently prevented. Patent No. 5690908 which is a patent publication of No. 5, patent No. 5750529 divided from the parent application for patent document 1, and patent No. 5856664 divided from patent document 1 It is necessary to consider such a design that the locking recess of the plate and the locking protrusion of the support base are fitted to each other.

  Therefore, as shown in Patent Document 2, a dowel pin having an irregular cross section (non-circular cross section) whose cross section perpendicular to the longitudinal direction of the dowel pin is not round is adopted, and the dowel pin is inserted in the longitudinal direction of the insertion hole. In the case of adopting a corresponding irregular cross-section insertion hole in which the vertical cross-sectional shape allows insertion of the irregular cross-section dowel pin (as a specific example, the dowel pin 3 having the valley 17 of FIG. 15 or the like and the shape of the connecting hole 5 for inserting the dowel pin in FIG. 15 and the connecting hole 5 in FIG. 15), the action of the dowel pin and its connecting hole (inserting hole), and the connecting protrusion described in Patent Document 2 below The cut tooth profile model 20 (see FIG. 7 of Patent Document 2) is inserted into or removed from the insertion hole for the pin of the synthetic resin support base by the action of the concave portion for connection, and the prosthetic work is performed. The cut pieces when fitted the cut pieces to the support base is estimated to be relatively prevent problems such as rotation in the case. However, in practice, referring to FIGS. 7 and 8 of Patent Document 1 and the description of [0051] to [0054] for reference of the description, the description will be made by replacing the dowel pin with an irregular cross section and its insertion hole. Gypsum 52 is injected into the injection space 50 from above the dowel pin to form the fixing plate 6 in which the dowel pin 8 is implanted. The support base made of synthetic resin having a deformed cross section dowel pin and a deformed cross section insertion hole. If a table is used, it becomes difficult to completely prevent gypsum from entering between the insertion hole 18 of the cylindrical projection 22 and the dowel pin 8, and the side surface of the dowel pin 8 and the dowel pin of the support base made of synthetic resin can be prevented. Since gypsum adheres to the wall surface of the insertion hole and is molded, the side surface of the dowel pin 8 or the dowel pin of the dowel pin 8 is used when performing the prosthetic operation of the target tooth of the dental model by inserting or removing the cut piece a plurality of times. Insertion The gypsum adhering to the wall surface of the entrance hole is scraped off by friction between the insertion hole 18 and the dowel pin 8, and a gap is formed between the insertion hole 18 and the dowel pin 8, so that the position of the cut piece can be accurately set after all. From the viewpoint of eliminating such adhesion of gypsum to the dowel pin, a dowel pin having a round cross section perpendicular to the longitudinal direction of the dowel pin is used, and the insertion hole of the dowel pin is also used. It is desirable to adopt an insertion hole having a round cross section in the shape perpendicular to the longitudinal direction. The reason for this is that in the case of a synthetic resin support base, if the support base is formed from a synthetic resin, the insertion hole having a deformed cross section is likely to be deformed due to shrinkage or expansion during molding. Although it is not certain, because the shrinkage force and expansion force are evenly distributed around the insertion hole, deformation is unlikely to occur, so that the dowel pin is inserted in the insertion hole of the support base as described above. When gypsum 52 is injected from above into the injection space 50 to form a fixing plate 6 in which dowel pins 8 are implanted, gypsum may enter between the dowel pins and the insertion holes of the support base. It seems that it can be prevented.

JP 2014-79629 A JP 2009-100080 A

  The present invention solves the above-mentioned problems of the dowel pin with the odd-shaped cross section, does not allow gypsum to enter the dowel pin insertion hole, etc., and easily rotates when the dowel pin with the round cross section and its supporting base are used. It is an object of the present invention to provide a dowel pin used for a dental technician working model with improved thickness and a support base into which the dowel pin is inserted. Still another object of the present invention is to provide a plug for preventing gypsum from entering the insertion hole when there is an insertion hole for inserting the dowel pin in the insertion hole for inserting the dowel pin of the support base.

(1) A dowel pin used in the dental technician work model of the present invention and a support base into which the dowel pin is inserted,
A support base made of a synthetic resin provided with a metal dowel pin to be planted on a fixing plate formed of gypsum to which the tooth model is fixed, and an insertion hole into which the dowel pin is inserted. Because
The dowel pin includes a fixing base end fixed to the fixing plate, an upper main body formed below the fixing base end, and a lower main body formed below the upper main body. The upper body portion of the dowel pin is a columnar shape or a truncated cone shape whose outer diameter is slightly narrowed toward the tip of the dowel pin, and the lower body portion has an outer diameter upward toward the tip of the dowel pin. It is gradually reduced from the main body part, and a part of the side surface of the lower main body part is an irregular substantially truncated cone shape that is a flat surface extending in the longitudinal direction to the tip of the dowel pin, and one side surface of the flat surface or I have two,
The support base formed of the synthetic resin has an insertion hole in which the dowel pin is inserted into an insertion hole in which the upper body portion and the lower body portion of the dowel pin can be fitted. Features.

  (2) In the dowel pin used for the dental technician working model described in the above item (1) and the support base into which the dowel pin is inserted, the length of the upper main body portion of the dowel pin is 1.5-2. The support base is a support base having an insertion hole in which the shape of the insertion hole into which the dowel pin is inserted can be fitted into the upper main body portion and the lower main body portion of the dowel pin. preferable.

  (3) In the dowel pin used in the dental technician work model described in any one of the above items (1) or (2) and the support base into which the dowel pin is inserted, the dowel pin is an upper body portion thereof. Is a frustoconical dowel pin whose outer diameter is slightly narrowed toward the tip of the dowel pin, and the degree to which the outer diameter is narrowed is 0.5 to 3 degrees in angle toward the tip. The base is preferably a support base having an insertion hole in which the upper body portion and the lower body portion of the dowel pin can be fitted to each other.

  (4) In the dowel pin used in the dental technician working model according to any one of the above items (1) to (3) and the support base into which the dowel pin is inserted, When a fixing plate having a locking recess or protrusion provided on the opposite surface of the table is used, the support base corresponds to a position where the locking recess or protrusion of the fixing plate is provided. The support base is provided with a locking protrusion or recess that can be fitted to the locking recess or protrusion provided on the fixing plate facing surface on the surface side of the support base at a position. It is preferable.

(5) The stopper according to any one of (1) to (4) above, wherein the stopper for preventing gypsum from entering the insertion hole into which the dowel pin is not inserted in the insertion hole for inserting the dowel pin of the support base of the present invention. A stopper for preventing gypsum from entering the insertion hole in which the dowel pin is not inserted in the insertion hole for inserting the dowel pin of the base,
A plug (A) comprising an upper main body portion and a lower main body portion having the same shape and dimensions as those of the dowel pin without the fixing base end portion of the dowel pin according to any one of the above items (1) to (3),
Or, the plug (B) comprising the upper main body portion and the lower main body portion of the shape in which the lower main body portion of the plug (A) is cut and shortened in the middle of the length direction,
Or the plug (C) consisting only of the upper main body of the plug (A)
Alternatively, a plug in which a head block is further formed following the upper end portion of the upper body portion of any one of the plugs (A) to (C), and is a plane viewed from the top of the head block. The area is a head block having a plane area larger than the plane area of the upper end portion of the upper body portion of the stopper, and the top surface of the head block from the portion corresponding to the upper end portion of the upper body portion of the stopper. The head block stopper with the same dimensions as the length of the base end for fixing the dowel pin (D)
It is either of these.

  (6) In the gypsum intrusion prevention plug of the plug with head block (D) described in the above (5), a support base having a locking projection provided on the surface of the support base is used. So that the bottom surface of the head block does not come into contact with the locking projection when the stopper is attached to the insertion hole of the support base, so that at least the locking projection exists. With a head block having a head block formed by providing a notch on the lower surface of the head block or maintaining the lower surface of the head block at a height that does not contact the locking projection A stopper (D) is preferred.

  (7) In the gypsum intrusion prevention plug according to any one of (5) and (6), the plug is preferably a plug made of a synthetic resin.

  (1) In the dowel pin and the support base into which the dowel pin is inserted according to the item (1) of the present invention, the outer body of the upper body portion of the dowel pin has a cylindrical shape or is slightly narrowed toward the tip of the dowel pin. In the portion corresponding to the upper body portion of the dowel pin, the shape of the insertion hole of the support base formed of a synthetic resin into which the dowel pin is inserted is an upper body portion of the dowel pin. Since the insertion hole has a shape that can be fitted, the cross-sectional shape of the upper body portion in a direction perpendicular to the longitudinal direction of the dowel pin is a round cross section, and the support to which the upper body portion of the dowel pin is fitted is provided. The shape of the corresponding part of the insertion hole of the base is also a round cross section. Therefore, the dowel pin is inserted into the insertion hole of the support base and the base end for fixing the dowel pin is buried. Even if the plaster is poured to the extent that the fixing plate is formed or the tooth model is further joined thereto, the plaster does not flow into the insertion hole of the support base, but the plaster flows into the insertion hole of the support base. Can solve the above-mentioned problems. Moreover, the lower main body portion of the dowel pin has an irregular substantially truncated cone shape in which a part of the side surface is a flat surface extending in the longitudinal direction to the tip of the dowel pin, and one or two side surfaces of the flat surface are formed. The support base is an insertion hole having a shape that allows the lower body portion of the dowel pin to be fitted to the insertion hole of the support base to which the lower body portion of the dowel pin is fitted. Therefore, the wall surface of the insertion hole corresponding to the portion where the flat surface of the dowel pin is provided also has a flat surface in which one or two portions are provided in the longitudinal direction up to the lower portion of the insertion hole depending on the number of the flat surfaces of the dowel pin. Because of the shape, when the prosthetic work is performed by inserting or removing the cut plate with the tooth model inserted into the insertion hole of the synthetic resin support base, the plate with the tooth model attached is cut. Dowel pins and the insertion holes are all likely to occur in the case of a round cross-section when fitted to Jimotodai can prevent problems such as the cut piece is rotated. Moreover, the dowel pins are made of metal, and when a somewhat large force is applied to the tooth profile model at the time of work such as when using synthetic resin dowel pins, it is possible to prevent the possibility that the cut fixing plate will wobble with respect to the support base, Stable work can be performed. Furthermore, since the outer diameter of the lower main body portion gradually decreases from the upper main body portion toward the tip of the dowel pin, it is relatively easy to insert and remove the cut fixing plate into the predetermined insertion hole of the support base. It is preferable.

  (2) In the dowel pin and the support base into which the dowel pin is inserted according to the item (2) of the present invention, the length of the upper main body portion of the dowel pin is 1.5 to 2.5 mm, and the support base Since the shape of the insertion hole into which the dowel pin is inserted is an insertion hole in which the upper main body portion and the lower main body portion of the dowel pin can be fitted, the plaster flows into the insertion hole of the support base. In addition, the length of the upper body portion of the dowel pin is too long, and it is difficult to operate because the insertion / removal of the fixed support plate with the tooth profile model into the predetermined insertion hole is too tight. This is also preferable.

  (3) In the dowel pin and the support base into which the dowel pin is inserted according to the item (3) of the present invention, a cone in which the upper body portion of the dowel pin is slightly narrowed in the outer diameter toward the tip of the dowel pin. In the case of a trapezoidal dowel pin, the degree to which the outer diameter is narrowed is 0.5 to 3 degrees in an angle toward the distal end, and the support base has a shape of the insertion hole of the dowel pin, and the upper main body portion of the dowel pin Since the support base has an insertion hole that can be fitted into the lower body portion, the dowel pin is inserted into the upper body portion of the dowel pin so as to close the insertion hole of the support base with a stopper. Therefore, it is possible to further prevent the gypsum from flowing into the insertion hole of the support base, which is preferable.

  (4) In the dowel pin used for the dental technician working model described in the above (4) and the support base into which the dowel pin is inserted, in the fixing plate, the locking recess is formed on the opposing surface of the support base. Alternatively, when using a fixing plate provided with a protrusion, the support base is on the surface side of the support base at a position corresponding to the position where the locking recess or protrusion of the fixing plate is provided. The dowel pin is a support base provided with a locking protrusion or recess that can be fitted into the locking recess or protrusion provided on the fixing plate facing surface. Combined with the effect of the provision of flat surfaces on the side and side walls, which is a feature of the shape of the insertion hole of the support base into which the dowel pin is inserted, and a prosthesis using a dental technician work model Work Preferred can more reliably prevent problems such as the cut pieces when fitting the cut pieces of the tooth-type model with fixing plate to the support base is rotated in the case.

  (5) In the stopper for preventing gypsum intrusion described in the above item (5), it is preferable that gypsum can be surely prevented from entering the insertion hole where the dowel pin is not inserted in the insertion hole for inserting the dowel pin of the support base. That is, like the dowel pin of the present invention, the cross-sectional shape of the plug corresponding to the upper main body portion of the dowel pin is a round cross section, and the insertion hole of the support base into which the portion corresponding to the upper main body portion of the plug is fitted. The shape of the part also has a round cross section. Therefore, even if the plug is inserted into the insertion hole of the support base and gypsum is poured into it to form a fixing plate, or a dental model is joined to it, the plug is attached. It is possible to prevent gypsum from flowing into the insertion hole of the support base. As a result, when gypsum flows into the insertion hole of the support base and the gypsum hardens, it becomes difficult to remove the fixing plate from the support base, and the hardened gypsum remains in the insertion hole of the support base. This makes it possible to prevent the support base made from being made unusable and to make it possible to reuse the support base made of synthetic resin.

  In particular, in the plug with head block (D), in addition to the above effects, the height from the portion corresponding to the upper end of the upper main body portion of the plug to the uppermost surface of the head block is determined as the dowel pin fixing base. Since the length is the same as the length of the end portion, suppose that the plaster 52 is poured into the injection space 50 as described with reference to FIGS. 5 to 7, and the tooth model 104 is placed on the plaster model 104 before the plaster is not yet cured. When the model is joined to the fixing plate without using an adhesive, if any of the stoppers (A) to (C) without the head block is used, the lower surface of the tooth model 104 cannot be supported. Depending on the position where it is not used, the tooth model placed on the uncured gypsum may tilt, but in the plug with head block (D), the tooth profile is supported to support the lower surface of the tooth model. The model is tilted By using it as a plug at a position necessary to prevent damaging, the height from the portion corresponding to the upper end portion of the upper main body portion of the plug to the uppermost surface of the head block corresponds to the upper end portion of the plug. Since the length of the dowel pin is fixed to the same length as the base end of the dowel pin, the top surface of the head block is in contact with the lower surface of the tooth model and supports the tooth model, so it is placed on the uncured plaster. It is preferable because the tooth profile model can be prevented from tilting.

  (6) In the gypsum intrusion prevention plug according to the item (6), even when a support base having a locking projection provided on the surface of the support base is used, the support base When a stopper is attached to the insertion hole, the lower surface of the head block does not come into contact with the locking projection, and the head block does not tilt, and the height of the uppermost surface of the head block is used. Since it is the same as the height of the base end for fixing the dowel pin, the uppermost surface of the head block is kept at the predetermined height on the lower surface of the tooth model regardless of the presence or absence of the locking projection on the surface of the support base. Since the contact is made, it is possible to prevent the tooth model placed on the uncured gypsum from being inclined, which is preferable. This type of gypsum intrusion prevention plug can also be used when using a support base that does not have a locking projection on the surface of the support base. Therefore, either when using a support base having a locking projection on the surface of the support base or when using a support base without a locking projection on the surface of the support base. Can also be used in common.

  (7) In the gypsum intrusion prevention plug according to (7), the gypsum intrusion prevention plug is not required to be strong like the dowel pin by adopting a preferred embodiment in which the plug is a plug made of a synthetic resin. Therefore, it is not necessary to use a high-cost metal, and the gypsum invasion prevention plug is disposable. Therefore, the use of a synthetic resin is preferable because the cost can be reduced.

The perspective view which shows the whole working model for dental technicians by the 1st Embodiment of this invention. The disassembled perspective view which shows the working model for dental technicians of FIG. (A) is a figure which shows the upper surface of a support base, (b) is a figure which shows the lower surface of the plate for fixation. Sectional drawing of the working model for dental technicians by the AA line in FIG. The perspective view which shows the state before mounting | wearing with the base frame for shaping | molding on the upper part of a support base. Sectional drawing which shows the state which mounted | wore the base frame for shaping | molding on the upper part of a support base. Sectional drawing which shows the state which injected the gypsum in injection | pouring space. (A) is a figure which shows the upper surface of the support base of the working model for dental technicians by the 2nd Embodiment (the whole dental technician working model) of this invention, (b) shows the lower surface of the plate for fixation. Figure. The disassembled perspective view which shows the 3rd Embodiment (whole work model for dental technicians) of this invention. (A) is a figure which shows the upper surface of the support base of the working model for dental technicians by the 3rd Embodiment of this invention, (b) is a figure which shows the lower surface of the plate for fixation. 1 is a side view of an example embodiment of a dowel pin used in the present invention. FIG. 11A is an end view of the AA ′ cut surface of the dowel pin of FIG. 11, and FIG. 11B is an end view of the BB ′ cut surface of the lower body portion 2 slightly below the upper body portion 1 of the dowel pin of FIG. FIG. 12C is an end view of the CC ′ cut surface of the dowel pin of FIG. 11, and FIG. 11D is an end view of the DD ′ plane of the dowel pin of FIG. FIG. 6 is a side view of another example embodiment of a dowel pin used in the present invention. (A) is an end view of the AA ′ cut surface of the dowel pin of FIG. 13, (b) is an end view of the BB ′ cut surface of the lower body portion 2 of the dowel pin of FIG. 13, and (c) is an end view of FIG. FIG. 14D is an end view of the C-C ′ cut surface of the dowel pin, and FIG. 14D is an end view of the DD ′ plane of the dowel pin of FIG. 13. The side view of another example of 1 embodiment of the dowel pin used by this invention. 15A is an end view of the AA ′ cut surface of the upper body portion 1 of the dowel pin of FIG. 15, and FIG. 15B is a BB ′ cut of the lower body portion 2 slightly below the upper body portion 1 of FIG. (C) is an end view of the CC ′ cut surface of the lower main body 2 in FIG. 15, and (d) is an end view of the DD ′ plane of the lower main body 2 in FIG. 15. The side view of another example of 1 embodiment of the dowel pin used by this invention. FIG. 18 is an AA ′ cross-sectional view of the upper main body 1 of the dowel pin of FIG. 17. The side view of the stopper of one Embodiment for preventing the gypsum penetration | invasion used by this invention. The side view of the stopper of another embodiment for preventing the gypsum penetration | invasion used by this invention. The side view of the stopper of another one Embodiment for preventing the gypsum penetration | invasion used by this invention. The side view of one Embodiment of the stopper with a head block for preventing the gypsum penetration | invasion used by this invention, and preventing the inclination of a tooth profile model. The top view seen from the head block upper part of the stopper with a head block shown in FIG. A dowel pin is inserted into a part of the insertion hole of the support base, the stopper of the present invention having no head block is attached to a part of the other insertion hole, and a stopper having a head block is attached to the remaining insertion hole. The exploded perspective view for explanation in the case of wearing. The figure which shows the upper surface of the support base of the working model for partial dental technicians for demonstrating the area of the plane seen from the upper part of the head block. The figure which shows the upper surface of the support base of the working model for dental technicians for all jaws for demonstrating the area of the plane seen from the upper part of the head block. The side view of another one Embodiment of the stopper with a head block for preventing the gypsum penetration | invasion used by this invention, and preventing the inclination of a tooth model. The side view of another one Embodiment of the stopper with a head block for preventing the gypsum penetration | invasion used by this invention, and preventing the inclination of a tooth model. The side view of another one Embodiment of the stopper with a head block for preventing the gypsum penetration | invasion used by this invention, and preventing the inclination of a tooth model. The top view seen from the head block upper part of the stopper with a head block of FIG. The side view of another one Embodiment of the stopper with a head block for preventing the gypsum penetration | invasion used by this invention, and preventing the inclination of a tooth model. The side view of another one Embodiment of the stopper with a head block for preventing the gypsum penetration | invasion used by this invention, and preventing the inclination of a tooth model. The side view of another one Embodiment of the stopper with a head block for preventing the gypsum penetration | invasion used by this invention, and preventing the inclination of a tooth model. The top view seen from the head block upper part of the stopper with a head block of FIG. The side view of another one Embodiment of the stopper with a head block for preventing the gypsum penetration | invasion used by this invention, and preventing the inclination of a tooth model. The side view of another one Embodiment of the stopper with a head block for preventing the gypsum penetration | invasion used by this invention, and preventing the inclination of a tooth model.

  DESCRIPTION OF EMBODIMENTS Hereinafter, various embodiments of a dental technician work model and a support base used therefor according to the present invention will be described with reference to the accompanying drawings.

[First Embodiment (Whole Dental Technic Work Model)]
First, referring to FIG. 1 to FIG. 7, in order to make it easy to understand the usage forms of the dental technician work model of the first embodiment and the support base and dowel pins used therein, a general example I will give you a description. In the present invention, the shape of the dowel pin and the shape of the insertion hole of the support base formed of the synthetic resin provided with the insertion hole into which the dowel pin is inserted are the specific shapes defined in the present invention. Specific embodiments of these shapes will be described later with reference to other drawings. Therefore, in the description of FIGS. 1 to 7, the shape of the dowel pin and the shape of the insertion hole of the support base formed of the synthetic resin provided with the insertion hole into which the dowel pin is inserted are as follows. The shape and the shape of the insertion hole of the support base formed of a synthetic resin provided with the insertion hole into which the dowel pin is inserted may be replaced with the shape of the dowel pin. About the shape of the insertion hole of the support base, it is a schematic diagram because the figure is small, in order to easily understand how the dowel pin and the support base are used and in what positional relationship The shape of the dowel pin and the shape of the insertion hole of the support base may be interpreted by applying the shape defined in the present invention as described above.

  FIG. 1 is a perspective view showing the entire dental technician work model according to the first embodiment using the dowel pin and the support base of the present invention, and FIG. 2 is an exploded perspective view showing the dental technician work model of FIG. 3 (a) is a diagram showing the top surface of the support base, FIG. 3 (b) is a diagram showing the bottom surface of the fixing plate, and FIG. FIG. 5 is a cross-sectional view of a dental technician work model along line A, FIG. 5 is a perspective view showing a state before the molding base frame is mounted on the upper part of the support base, and FIG. 6 is an upper part of the support base. FIG. 7 is a cross-sectional view showing a state in which gypsum is injected into the injection space.

   Referring to FIGS. 1 and 2, a dental work model 102 shown in FIG. 1 includes a fixing plate 106 to which a tooth model 104 is fixed, five dowel pins 8 implanted in the fixing plate 106, and a fixing plate 106. And a support base 10 for supporting the working plate 106.

  The support base 10 includes a support base body 12, which is made of an appropriate synthetic resin such as polyethylene resin, polypropylene resin, polyamide resin, acrylic resin, polystyrene resin, polyurethane resin, and other synthetic resins. Is formed. In addition, you may contain a filler, a filler, an aggregate, and other additives as needed. The support base main body 12 has a horizontally long and cylindrical peripheral side wall 14 and a horizontally long upper wall 16 that covers the upper side of the peripheral side wall 14. On the upper surface of the upper wall 16, five dowel pin insertion holes 18 are provided at intervals in the longitudinal direction. In a space 20 (see FIG. 4) formed inside the peripheral side wall 14, a cylindrical protrusion 22 extending downward from the lower surface of the upper wall 16 corresponding to each insertion hole 18 is provided. 18 is provided through the inside of the cylindrical protrusion 22. Each insertion hole 18 is an insertion hole having an inner wall shape into which the dowel pin can be fitted in accordance with the shape of the dowel pin 8 of the present invention to be used. The upper body portion and the lower portion of the dowel pin used in the present invention. A shape into which the main body part can be fitted, that is, an insertion hole having an inner wall shape that embodies the upper main body part and the lower main body part of the dowel pin, and follows the lower main body part 2 (see FIGS. 11 to 17) of the dowel pin described later. In this way, the cylindrical protrusion 22 is formed in a taper shape in which the inner diameter gradually decreases from the upper end portion where the lower body portion 2 of the dowel pin contacts the lower end portion. The length of the cylindrical projection 22 is such that the tip of the dowel pin protrudes slightly from the tip of the cylindrical projection 22, but the lower end of the dowel pin is pushed upward with a finger to fix the fixing plate 106 to which the tooth model 4 is fixed. It is convenient when removing from the support base 10, but is not particularly limited to this. The length of the dowel pin is the same as the tip of the cylindrical protrusion 22, or the tip of the dowel pin is a cylinder. The length which the front-end | tip of the shape-like protrusion 22 exceeds may be sufficient. However, it is usually desirable to prevent the tip of the dowel pin or the cylindrical protrusion 22 from protruding from the lower end of the peripheral side wall 14 of the support base body 12. In the present invention, the lower body portion of the dowel pin is expressed as an irregular substantially truncated cone shape, but the expression of the truncated cone shape is an accurate truncated cone with a flat tip, but in the present invention, the dowel pin has a flat surface. For example, even if the tip portion is rounded or sharp, it is included in the expression of an irregular substantially truncated cone shape as long as there is no particular problem with the combination of the dowel pin and the support base of the present invention.

  In this embodiment, one side edge on the upper surface of the upper wall 16 is provided with a recess or protrusion on the side as indicated by reference numeral 24 in FIG. 2 and FIG. The other side edge is provided with a locking projection 25 which is a kind of another type of locking projection. Each of the locking protrusions 24 and the locking protrusions 25 protrudes upward and extends in the longitudinal direction of the upper wall 16. The protrusion height H (see FIG. 4) from the upper wall 16 of the locking protrusion 24 and the locking protrusion 25 is set to about 1.5 mm in this example.

  Since the locking protrusion 24 is shown in FIGS. 3 and 4 of Patent Document 1 and described in detail, detailed description thereof is omitted here.

  Further, another portion is provided in a portion (in detail, a portion between the other side edge and the insertion hole 18 on the upper surface of the upper wall 16) that is separated from the other side edge on the upper surface of the upper wall 16. A plurality of locking small protrusions 33 which are a kind of the locking protrusions are provided. The plurality of locking small protrusions 33 are arranged substantially in parallel to the locking protrusions 25 at intervals. The protruding height of the locking small protrusion 33 is configured to be approximately the same as or slightly lower than the protruding height H of the locking protrusion 24. In the present embodiment, the locking small protrusion 33 is formed in a rectangular shape (three-dimensionally substantially rectangular parallelepiped shape) in a plan view, and has a length of, for example, about 3 mm. In addition, the arrangement interval (for example, about 4 mm) of the locking small protrusions 33 is configured to be shorter than the arrangement interval (for example, about 9 mm) of the insertion hole 18, and thereby, between the pair of adjacent insertion holes 18. Correspondingly, for example, 1 to 4 (preferably 2 to 3) locking small protrusions 33 are provided. The protruding height from the upper wall 16 of the locking small protrusion 33 is set to about 1.5 mm in this example.

  Further, on the outer peripheral surface of the peripheral side wall 14, a position identification protrusion 34 is provided corresponding to the insertion hole 18 (in other words, corresponding to the dowel pin 8 of the fixing plate 106). The position identification protrusions 34 are disposed on both sides of the insertion hole 18, respectively.

  The fixing plate 106 is made of plaster and has a horizontally long shape corresponding to the shape of the upper wall 16 of the support base body 12. Five dowel pins 8 are implanted in the fixing plate 106 corresponding to the insertion holes 18 of the support base body 12. Further, the fixing base end portion 4 fixed to the fixing plate of the dowel pin 8 implanted in the fixing plate 106 is knurled to increase the fixing strength with respect to the fixing plate 106. The dowel pins must be made of metal, and brass, stainless steel, etc. are preferably used. In the case of plastic dowel pins, if a large force is applied to the tooth profile model during work, the dowel pins are cut. There is a possibility that the fixing plate with the tooth profile model may wobble with respect to the support base, and stable work cannot be performed.

  In addition, as explained in FIG. 1, the plaster is used for the fixing plate, for example, by cutting along the cutting line 54 together with the tooth model 104 or by reference numeral 74 (cutting line) in FIG. This is to make it easy to cut when cutting, and the support base is formed of synthetic resin when the fixing plate is cut together with the tooth model 4 so that the support base is easily cut. This is for preventing, mass production, strength and reusability. These matters are the same in other embodiments.

  Further, one side edge of the lower surface of the fixing plate 106 (that is, the surface on which the dowel pin 8 protrudes) corresponds to the locking protrusion 24 of the support base body 12 and can be fitted to it. A recessed portion 36 is provided, and the other side edge corresponds to a locking protrusion 25 which is a type of locking protrusion of the support base body 12, and is a type of locking recess that can be fitted to the locking protrusion 25. A locking recess 37 is provided. Each of the locking recess 36 and the locking recess 37 is recessed inward of the fixing plate 106 and extends in the longitudinal direction of the fixing plate 106. Since the locking recess 36 is shown in FIG. 4 of Patent Document 1 and described in detail, detailed description thereof is omitted here.

  Further, a locking portion is provided on a portion of the lower surface of the fixing plate 106 that is further away from the other side edge (specifically, a portion between the other side edge of the lower surface of the fixing plate 106 and the dowel pin 8). A plurality of small locking recesses 45, which are a kind of recess, are provided. The plurality of locking small recesses 45 are substantially the same as the locking recesses 36 so as to correspond to the plurality of locking small protrusions 33 which are a kind of locking protrusions and can be fitted therewith. Parallel and spaced apart. In the present embodiment, the locking small recess 45 is formed in a rectangular shape (in a three-dimensional manner, a substantially rectangular parallelepiped shape) in plan view, and the length thereof is set to, for example, about 3 mm. Further, the arrangement interval (for example, about 4 mm) of the small locking recesses 45 is configured to be shorter than the arrangement interval (for example, about 9 mm) of the dowel pins 8, thereby correspondingly between a pair of adjacent dowel pins 8. For example, 1 to 4 (preferably 2 to 3) small locking recesses 45 are provided.

  On the upper surface of the fixing plate 106, a tooth model 104 (partial type in this embodiment) formed of gypsum is fixed. The fixing plate 106 is detachably supported on the upper surface of the upper wall 16 of the support base body 12 by inserting the dowel pins 8 into the corresponding insertion holes 18 in a detachable manner. In this support state, the tip of the dowel pin 8 protrudes somewhat downward from the lower end of the cylindrical protrusion 22 (see FIG. 4). Each of the locking projections 24 is detachably fitted to the locking recess 36. Further, the locking protrusion 25 and the locking recess 37 are detachably fitted to each other, and the plurality of locking small protrusions 33 and the plurality of locking small recesses 45 are mutually connected. It is detachably fitted.

  Next, with reference to FIGS. 5-7, the manufacturing method of the working model 102 for dental technicians mentioned above is demonstrated. First, plaster is poured into a negative tooth shape (not shown) engraved from the patient's teeth to produce the tooth model 104, and the support base body 12 is produced by injection molding with synthetic resin. Then, as shown in FIG. 5, the dowel pins 8 are detachably inserted into the respective insertion holes 18 of the support base body 12 from the distal end side (pin insertion process). When inserted in this manner, the fixing base end 4 of the dowel pin 8 protrudes upward by a predetermined length (for example, about 4 mm) from the upper wall 16 of the support base body 12 (see FIG. 6).

  Thereafter, as shown in FIGS. 6 and 7, the molding base frame 46 is detachably mounted on the upper portion of the support base body 12 (frame mounting step). Here, the molding base frame 46 used in the frame mounting step will be described. The molding base frame 46 has a substantially rectangular outer shape as a whole, and is formed of a rubber material such as silicon rubber or synthetic rubber. An opening 48 penetrating vertically is provided inside the molding base frame 46, and the opening 48 has a shape corresponding to the shape of the upper portion of the support base body 12.

  When the molding base frame 46 is mounted on the upper part of the support base body 12, the upper wall 16 and the upper end of the peripheral side wall 14 of the support base body 12 are inserted into the lower end of the opening 48. The peripheral surface comes into close contact with the outer peripheral surface of the peripheral side wall 14. At this time, the molding base frame 46 is positioned with respect to the support base body 12 by the lower end portion of the molding base frame 46 being supported by the position identification protrusion 34 of the support base body 12. In this mounted state, the molding base frame 46 protrudes upward from the upper wall 16 of the support base body 12 by a predetermined height (for example, about 8 mm). The injection space 50 is defined by the inner peripheral surface of the base frame 46.

  Thereafter, as shown in FIG. 7, gypsum 52 for molding the fixing plate 106 is poured into the injection space 50 (plate molding process). The gypsum 52 is poured until the fixing base end 4 of the dowel pin 8 is completely immersed in the gypsum 52. In this case, as described above, the cross-sectional shape of the upper main body portion in the direction perpendicular to the longitudinal direction of the dowel pin is a round cross section, and the insertion hole 18 of the support base to which the upper main body portion of the dowel pin is fitted. The shape of the part is also a round cross section that the upper body portion of the dowel pin 8 can fit into. Therefore, the plaster is poured to such an extent that the dowel pin is inserted into the insertion hole of the support base and the fixing end 4 of the dowel pin is buried. Even if the fixing plate is formed, the plaster does not flow into the insertion hole of the support base, and the problems caused by the gypsum flowing into the insertion hole of the support base can be solved.

  Then, the plaster 52 in the injection space 50 is hardened, so that the dowel pin 8 is implanted and the locking recess 36, the locking recess 37, and the plurality of locking small recesses 45 are formed. 106 is molded (see FIG. 3B). After that, the molding base frame 46 is removed from the upper part of the support base body 12, and the upper surface of the fixing plate 106 is processed to be flat by, for example, grinding (processing process). This processing is performed in a state where the fixing plate 106 is supported on the upper surface of the support base body 12 and is normally performed until the upper surface of the fixing base end portion of the dowel pin 8 is exposed to the outside.

  Thereafter, the tooth model 104 is fixed to the upper surface of the fixing plate 106 subjected to the grinding using an adhesive or the like (model fixing step). Alternatively, the tooth model 104 may be placed on the upper surface of the fixing plate 106 before solidifying, and the tooth model 104 may be joined to the upper surface of the fixing plate 106 without using an adhesive. After that, in a state where the fixing plate 106 on which the tooth model 104 is formed is supported on the upper surface of the support base body 12, a predetermined portion of the tooth model 104 (along a cutting line 54 shown by a one-dot chain line in FIG. That is, a part between adjacent pairs of dowel pins 8 is cut using a cutting tool (not shown) together with the fixing plate 106 (cutting step). By cutting in this way, the cut portion of the tooth model 104 can be taken out from the remaining portion together with the fixing plate 106 and the dowel pin 8. As described above, the support base body 12 is provided with the position identification protrusions 34 corresponding to the insertion holes 18, so that when the fixing plate 106 is cut together with the tooth profile model 104, this position is determined. Based on the identification protrusion 34, the location of the dowel pin 8 can be easily confirmed.

  The required work (for example, production of a crown prosthesis) using the cut fixing plate 106 with the tooth model 104 is performed by supporting the fixed plate 106 with the tooth model 104 on the upper surface of the support base body 12. It is carried out in the state. At this time, the dowel pin of the present invention has one or two side surfaces in which the longitudinal side surface of the lower main body portion is a flat surface, and the insertion hole into which the dowel pin is inserted can be inserted into the dowel pin. Since the hole is formed in the hole, the inner wall of the insertion hole corresponding to the flat surface of the side surface of the lower body portion of the dowel pin is also a flat surface, and the rotation of the cut fixing plate 106 with the tooth model 104 with respect to the support base body 12 is rotated. It is possible to sufficiently prevent wobble and the like.

  Furthermore, in the dental technician work model 102 of the present embodiment, as described above, the protrusions and recesses of the locking protrusions 24 and the recesses and protrusions of the locking recesses 36 are fitted into each other. At the same time, the locking protrusions 25 and the locking recesses 37 are fitted to each other, and the plurality of locking small protrusions 33 and the plurality of locking small recesses 45 are fitted to each other. Therefore, the horizontal fitting strength between the fixing plate 106 and the support base body 12 can be further increased, and the rotation and wobble of the cut fixing plate 106 with respect to the support base body 12 can be extremely reduced. It can be completely prevented.

  In the above embodiment, since the support base having the metal-made dowel pin of the present invention and the insertion hole that can be fitted to the metal is used, it is not always necessary to provide the locking protrusion on the upper wall of the support base. It is not necessary to provide a recess, and a locking recess or protrusion that can be fitted to the lower surface of the fixing plate at a position corresponding to the recess, and these locking protrusions and recesses are more preferably present, As in the above embodiment, the locking protrusion 24 which is a kind of locking protrusion on the upper wall of the support base, the locking protrusion 25 which is a kind of another locking protrusion, A plurality of locking small protrusions 33, which are a kind of locking protrusions of another form, and locking recesses and protrusions that can be fitted to these are provided on the lower surface of the fixing plate at positions corresponding to these. Although an example is shown, there is no need to use three types of locking projections and locking recesses in three rows in total. Preferably, by providing any one type of one row of locking projections and locking recesses, it is possible to sufficiently prevent rotation and wobble of the fixing plate 106 with the tooth model 104 with respect to the support base body 12. . The same applies to the following embodiments.

  In addition, in terms of the anti-rotation action of the cut tooth profile model, one row of the locking projections 1 row described above on the support base body, and correspondingly, on the lower surface of the fixing plate, It is sufficient to provide a row of locking recesses, but if only a row of locking projections and a row of locking recesses are provided, the dowel pin fixing plate with the tooth profile model is formed. When the dowel pin is inserted into the insertion hole of the support base, the support base is often placed with the support base on the upper side and the fixing plate on which the tooth model is formed on the lower side while the dental technician is working. It often happens that the table is held with fingers, but in such a case, the fixing plate with the tooth model with dowel pins falls off from the support base and falls, damaging the tooth model made of plaster. There is a fear, but as mentioned above By providing two or more rows of locking projections on the base and correspondingly two or more rows of locking recesses on the bottom surface of the fixing plate, the support base is on the upper side, and a tooth model is formed. Even if you hold the supporting base with your finger on the bottom with the fixing plate on the bottom, the fixing plate with the tooth model with dowel pins will come off from the supporting base and prevent the tooth model from being damaged This is preferable.

  In addition, the shapes of the locking recesses and protrusions described above are not limited to those shown in the above-described embodiments, but are disclosed in JP2009-100080A, JP2000-245749A, and JP2004. In addition, various locking projections and locking recesses proposed in the dental work model can be used in Japanese Patent Publication No. -283259 and Japanese Patent Application Laid-Open No. 2004-304528. The same applies to the following embodiments. In particular, when providing a locking projection or a locking recess, the combination of a plurality of locking projections or locking recesses as described above is particularly suitable.

[Second Embodiment (Whole working model for dental technician)]
As Embodiment 2, one type of one row of locking projections (in this case, one row of a plurality of locking small projections 33) is provided on the support base upper wall 16, and the corresponding position is fixed. 8 (a) and 8 (b), a specific example in which a row of locking recesses (in this case, a plurality of locking small recesses 45 in one row) that can be fitted to these plates is provided on the lower surface of the plate. It was shown to. FIG. 8A is a view showing the upper surface of the support base of the dental technician work model according to the second embodiment of the present invention (the whole dental technician work model), and FIG. 8B is the fixing plate thereof. FIG. In the present invention, the shape of the dowel pin and the shape of the insertion hole of the support base formed from the synthetic resin provided with the insertion hole into which the dowel pin is inserted are specific shapes defined in the present invention. As described above, these shapes are interpreted by applying the shapes defined in the present invention (for example, referring to the embodiment examples relating to the shape of the dowel pin and the shape of the insertion hole of the support base described later). That's fine. Therefore, in the description of FIG. 8, the shape of the dowel pin 8 and the shape of the insertion hole 18 of the support base made of synthetic resin provided with the insertion hole into which the dowel pin is inserted are the same as those of the dowel pin defined in the present invention. The shape and the shape of the insertion hole of the support base formed of a synthetic resin provided with the insertion hole for inserting the dowel pin may be replaced with the shape of the insertion hole of the support base, and the illustration in FIG. The shape of the insertion hole is a schematic diagram because it is small, and it is a drawing for explaining in an easy-to-understand manner how dowel pins and support bases are used and in what positional relationship The shape of the dowel pin and the shape of the insertion hole of the support base may be the shape defined in the present invention as described above. A plurality of locking small protrusions 33 are provided in a portion of the upper surface of the upper wall 16 of the support base main body 12 that is farther inward than one side edge. Each of the plurality of locking small protrusions 33 is disposed substantially parallel to and spaced from the arrangement direction of the plurality of insertion holes 18. In addition, the arrangement interval D1 ′ (for example, about 4 mm) of the plurality of locking small protrusions 33 is configured to be shorter than the arrangement interval D2 ′ (for example, about 10 mm) of the plurality of insertion holes 18, and is thereby adjacent. Correspondingly between the pair of insertion holes 18, for example, 1 to 4 (preferably 2 to 3) small locking projections 33 are arranged. The protruding height from the upper wall 16 of the locking small protrusion 33 is set to about 1.5 mm in this example. Note that the locking protrusions 24 and the locking protrusions 25 shown in the first embodiment are not provided on both side edges of the upper surface of the support base 10, and other configurations of the support base 10 are provided. Is the same as in the first embodiment.

  In addition, on the lower surface of the fixing plate 106, one row of rows of the plurality of dowel pins 8 is provided with a row of a plurality of locking small recesses 45 that are a kind of a plurality of locking recesses extending upward. The plurality of locking small recesses 45, which are a plurality of locking recesses, are disposed substantially parallel to and spaced from the arrangement direction of the plurality of dowel pins 8. Further, the arrangement interval D3 ′ (for example, about 4 mm) of the plurality of locking small recesses 45 is configured to be shorter than the arrangement interval D4 ′ (for example, about 10 mm) of the plurality of dowel pins 8, and thereby a pair of adjacent pairs Correspondingly between the dowel pins 8, for example, 1 to 4 (preferably 2 to 3) small locking recesses 45 are arranged. The locking recesses 36 and the locking recesses 37 described in the first embodiment are not provided on both side edges of the lower surface of the fixing plate 106. The configuration is the same as that of the first embodiment.

  When the fixing plate 106 is supported on the upper surface of the support base body 12, the locking small protrusions 33 and the locking small recesses 45 are provided with a plurality of locking small protrusions 33 and a plurality of locking small recesses. 45 are installed at positions where they can be fitted with each other.

  As described above, the shape defined in the present invention is applied to the shape of the dowel pin and the insertion hole of the support base (for example, the implementation of the dowel pin shape and the shape of the insertion hole of the support base described later). (Refer to an example of the form).

  Therefore, as described in the previous embodiment, the upper main body portion of the dowel pin has a cylindrical shape or a truncated cone shape whose outer diameter is slightly narrowed toward the tip of the dowel pin, and is made of a synthetic resin into which the dowel pin is inserted. The shape of the insertion hole of the formed support base is an insertion hole having a shape that allows the upper body portion of the dowel pin to fit in the portion corresponding to the upper body portion of the dowel pin. The cross-sectional shape of the upper main body portion in the direction perpendicular to the longitudinal direction of is a round cross section, and the shape of the portion of the insertion hole of the support base to which the upper main body portion of the dowel pin is fitted is also a round cross section, Therefore, even if the dowel pin is inserted into the insertion hole of the support base and the plaster is poured to such an extent that the fixing base end portion of the dowel pin is buried, the fixing plate is formed. Without flowing into the insertion hole of Jimotodai, gypsum can solve the aforementioned problems due to flow into the insertion hole of the support base. Further, a required operation using the cut tooth profile model (for example, production of a crown prosthesis) is performed with the cut fixing plate 106 supported on the upper surface of the support base body 12. Sometimes, the dowel pin has a flat side surface in a part of the longitudinal side surface of the lower main body, and has one or two side surfaces of the flat surface, and the dowel pin is inserted into the dowel pin. Since the insertion hole is also formed in a shape that can be fitted with the dowel pin, the inner wall of the hole corresponding to the flat surface of the side surface of the lower body portion of the dowel pin is also a flat surface. It is possible to sufficiently prevent the support base body 12 from rotating or wobbling. Moreover, a row of locking projections (in this case, a plurality of locking projections 33) are provided on the support base upper wall 16 and can be fitted to the lower surface of the fixing plate at the corresponding position. Since one row of locking recesses (in this case, a plurality of locking small recesses 45) are fitted, cutting is performed in combination with the shape of the dowel pin and the insertion hole having a shape that can be fitted therewith. The anti-rotation action of the formed tooth profile model can be further strengthened.

  Although not particularly illustrated, as an embodiment similar to the embodiment described in FIG. 8 above, as shown in FIG. 20 of Japanese Patent No. 5856664, on the upper surface of the upper wall 16K of the support base body 12K. A plurality of locking small protrusions are provided as 88K and 86K in a portion separated inward from both side edges, and corresponding to the two rows of locking small protrusions. On the lower surface of the fixing plate 6K, on both sides of the row of the plurality of dowel pins 8, a plurality of locking small recesses, which are a kind of a plurality of locking recesses extending upward, are provided in two rows as 90K and 92K. It is good also as an aspect. The small locking projections 88K and 86K and the small locking recesses 88K and 86K are provided with a plurality of small locking projections 88K and 86K when the fixing plate 6K is supported on the upper surface of the support base body 12K. And a plurality of locking small recesses 90K, 92K are installed at positions where they are fitted to each other.

  As described above, the shape defined in the present invention is applied to the shape of the dowel pin and the insertion hole of the support base (for example, the implementation of the dowel pin shape and the shape of the insertion hole of the support base described later). (Refer to an example of the form).

  In terms of the anti-rotation action of the cut tooth model, a plurality of small protrusions for locking on the support base body described in FIG. 8 and correspondingly on the lower surface of the fixing plate It is sufficient to provide a plurality of locking small recesses in a row, but if only a plurality of locking small protrusions in a row and a plurality of locking small recesses in a row are provided, dowel pins When the dowel pin is inserted into the insertion hole of the support base, the fixation plate with the tooth base model formed is often fixed while the dental technician is working. It often happens that the support plate is held down with the fingers, and in this case, the fixing plate with the tooth model with dowel pins falls off from the support plate and falls into the plaster. May damage the tooth model created in However, as described above, by providing a plurality of locking small protrusions on the support base and two rows of locking small recesses on the lower surface of the fixing plate corresponding thereto, Even if you hold the support base with your finger with the support base on the top, the fixing plate on which the tooth model is formed, and the finger on the support base, the fixing plate with the tooth model with dowel pins will come off from the support base. This is preferable because it can prevent the tooth model from falling and damaging the tooth model. In particular, when handling a tooth profile model cut into small pieces such as the cut tooth profile model described in FIGS. 1 and 10 and the cut tooth profile model 20 of FIG. Even when the support base is held with a finger, the fixing plate with the dowel pin with the dowel pin is detached from the support base and easily falls off. It is preferable that a plurality of locking small protrusions in a row and a plurality of locking small recesses in two rows are provided on the lower surface of the fixing plate correspondingly. This point is the same in other embodiments including the third embodiment.

[Third embodiment (whole dental technician work model)]
Next, FIGS. 9 and 10 show a working model for a dental technician according to a third embodiment using the dowel pin and the support base of the present invention. While the first and second embodiments of the entire dental technician work model are partial-type dental technician work models, this embodiment is an example of an all jaw type dental technician work model. .

  In the present invention, the shape of the dowel pin and the shape of the insertion hole of the support base formed from the synthetic resin provided with the insertion hole into which the dowel pin is inserted are specific shapes defined in the present invention. As described above, these shapes are interpreted by applying the shapes defined in the present invention (for example, referring to the embodiment examples relating to the shape of the dowel pin and the shape of the insertion hole of the support base described later). That's fine. Therefore, in the description of FIG. 9 and FIG. 10, the shape of the dowel pin and the shape of the insertion hole of the support base formed from the synthetic resin provided with the insertion hole into which the dowel pin is inserted are defined as the dowel pin defined in the present invention. 9 and the shape of the insertion hole of the support base formed of a synthetic resin provided with an insertion hole for inserting the dowel pin, and the illustration in FIGS. 9 to 10 is the shape of the dowel pin. The shape of the insertion holes of the support base and the support base is a schematic diagram because the figure is small, and it explains in an easy-to-understand manner how dowel pins and the support base are used and in what positional relationship As described above, the shape defined in the present invention may be applied to the shape of the dowel pin and the shape of the insertion hole of the support base.

  FIG. 9 is an exploded perspective view showing the whole dental work model using the shape of the dowel pin and the support base of the present invention, and FIG. 10A is a view showing the upper surface of the support base of FIG. FIG. 10B is a diagram showing the lower surface of the fixing plate.

  In the dental technician work model 102C of this embodiment, the tooth profile model 104C is composed of the whole upper tooth (or the whole lower tooth), that is, the whole jaw type. In this connection, the fixing plate 106 </ b> C is configured to extend in an arc shape, and 14 dowel pins 8 are implanted in the fixing plate 106 </ b> C at intervals with respect to the insertion holes 18. The upper wall 16C of the support base body 12C extends in an arc shape corresponding to the fixing plate 106C, and a substantially semi-elliptical support recess 70 is provided inside the upper wall 16C. On the outer peripheral surface of the peripheral side wall of the support base main body 12 </ b> C, a position identification protrusion 34 is provided corresponding to the insertion hole 18.

  As shown in FIG. 10 (a), 14 insertion holes 18 are provided at intervals on the upper surface of the upper wall 16C of the support base, and a part (specifically, a part spaced inward from the outer peripheral edge). (A portion between the outer peripheral edge of the upper surface of the upper wall 16C and the insertion hole 18) is provided with a plurality of locking small protrusions 33C which are a kind of locking protrusions. The plurality of locking small protrusions 33C are arranged substantially parallel to and spaced from the outer peripheral edge of the support base body 12C.

  Further, as shown in FIG. 10 (b), a portion separated inward from the outer peripheral edge on the lower surface of the fixing plate 106C (specifically, between the outer peripheral edge on the lower surface of the fixing plate 106C and the dowel pin 8). The part) is provided with a plurality of locking small recesses 45C, which are one type of locking recesses, corresponding to the plurality of locking small protrusions 33C. The plurality of locking small recesses 45C are disposed substantially parallel to and spaced from the outer peripheral edge of the fixing plate 106C. An arrangement interval D1 (for example, about 4 mm) of the plurality of locking small protrusions 33C is configured to be shorter than an arrangement interval D2 (for example, about 10 mm) of the plurality of insertion holes 18, and thereby a pair of adjacent insertion holes Corresponding to 18, for example, 1 to 4 (preferably 2 to 3) locking small protrusions 33 </ b> C are arranged. The protrusion height from the upper wall 16C of the locking small protrusion 33C is set to about 1.5 mm in this example. Further, the arrangement interval D3 (for example, about 4 mm) of the plurality of locking small recesses 45C is configured to be shorter than the arrangement interval D4 (for example, about 10 mm) of the plurality of dowel pins 8, and thereby a pair of adjacent dowel pins 8 is arranged. Correspondingly, for example, 1 to 4 (preferably 2 to 3) small locking recesses 45 are provided.

  As described above, the shape of the dowel pin 8 and the shape of the insertion hole 18 of the support base are in any form of the present invention.

  In the dental technician work model 102C of the present embodiment, the same operation and effect as described above are achieved. That is, when the fixing plate 106C to which the tooth model 104C is bonded is supported on the upper surface of the support base body 12C, the dowel pin 8 having a circular cross section on the upper body portion of the dowel pin 8 and a flat surface on the side surface of the lower body portion is fitted therewith. The plurality of locking small projections 33C and the plurality of locking small recesses 45C are fitted to each other, thereby achieving the following operational effects. The In the cutting step, when the fixing plate 106C is cut along the cutting line 74 shown by the one-dot chain line in FIG. 10B, a substantially fan-shaped plate portion 76 is formed. A part of the tooth model 104C shown in FIG. 9 is joined to the upper surface of the plate portion 76. Between the outer peripheral edge side of the substantially fan-shaped plate portion 76 and the dowel pin 8, the two small locking projections 33C and the two small locking recesses 45C are fitted to each other, and the dowel pin 8 Of the lower main body side surface and the flat surface of the insertion hole side surface of the support base that can be fitted to the dowel pin 8, and the substantially fan-shaped plate portion 76 with the tooth model and the support base body 12 </ b> C in the horizontal direction. Predetermined work (for example, work for creating a dental prosthesis) in which the strength can be kept high and the substantially fan-shaped plate portion 76 with the tooth model is mounted on the support base and the tooth model of the part is processed. Etc.) can be sufficiently prevented from wobbling such as rotation of the substantially fan-shaped plate portion with the tooth model.

  Further, the upper main body portion of the dowel pin has a columnar shape or a truncated cone shape whose outer diameter is slightly narrowed toward the tip of the dowel pin, and an insertion hole of a support base formed of a synthetic resin into which the dowel pin is inserted. In the portion corresponding to the upper body portion of the dowel pin, the upper portion in the direction perpendicular to the longitudinal direction of the dowel pin is formed because the upper body portion of the dowel pin can be fitted into the insertion hole. The cross-sectional shape of the main body portion is a round cross section, and the shape of the corresponding portion of the insertion hole of the support base to which the upper main body portion of the dowel pin is fitted is also a round cross-section, and accordingly, the dowel pin is inserted into the insertion hole of the support base. Even if the fixing plate is formed by pouring plaster to the extent that the fixing base end of the dowel pin is buried, the plaster may flow into the insertion hole of the support base. Ku, gypsum can solve the aforementioned problems due to flow into the insertion hole of the support base.

  Note that the shapes of the locking recesses and protrusions employed above are not limited to those shown in the above embodiment, but are the same as those described in the first embodiment of the dental work model. The locking protrusion 24, the locking protrusion 25, the locking recess 36 that can be fitted to the locking protrusion, the locking recess 37, and the like, Japanese Patent Application Laid-Open Nos. 2009-100080, 2000-245749, In addition, various locking protrusions and locking recesses proposed in a dental work model can be used as disclosed in Japanese Unexamined Patent Application Publication Nos. 2004-283259 and 2004-304528.

  In addition, using a fixing plate and a support base that do not have locking recesses and protrusions, support is also provided by a dental technician work model in the combination of a dowel pin having a prescribed shape of the present invention and an insertion hole of the support base. Is possible.

  Although not particularly illustrated, as an embodiment similar to the embodiment described in FIGS. 9 and 10, as shown in FIG. 19 of Japanese Patent No. 5856664, an upper wall 16J of the support base body 12J is provided. A plurality of locking small protrusions 86 and 88 are provided at portions spaced inward from both side edges on the upper surface of the upper surface of the upper surface of the upper surface of the two upper protrusions. Correspondingly, on the lower surface of the fixing plate 6J, on both sides of the row of the plurality of dowel pins 8, a plurality of locking small recesses 90, 92 which are a kind of a plurality of locking recesses extending upward are provided in two rows. It is good also as the aspect currently provided. The small locking protrusions 86 and 88 and the small locking recesses 90 and 92 are provided with a plurality of locking small protrusions 86 and 88 when the fixing plate 6J is supported on the upper surface of the support base body 12J. And the plurality of small locking recesses 90 and 92 are installed at positions where they are fitted to each other.

  As described above, the shape defined in the present invention is applied to the shape of the dowel pin and the insertion hole of the support base (for example, the implementation of the dowel pin shape and the shape of the insertion hole of the support base described later). (Refer to an example of the form).

  In terms of the anti-rotation action of the cut tooth model, a plurality of small protrusions for locking are fixed on the support base body described in FIGS. 9 and 10 of the present application, and correspondingly fixed. It is sufficient to provide a single row of a plurality of locking small recesses on the lower surface of the plate, but only when a single row of a plurality of locking small protrusions and a row of a plurality of locking small recesses are provided. When the dowel pin is inserted into the insertion hole of the support base and the dowel pin is inserted into the insertion hole of the support base, the dental technician often works with the support base up and the tooth model is It often happens that the support plate is held down with the finger on the support base, but in such a case, the support plate with the dowel pin and the tooth model is removed from the support base. Tooth profile model that is dropped and made of plaster Although there is a risk of breakage, as described above, a plurality of locking small protrusions in two rows on the support base and a plurality of locking small recesses in two rows on the lower surface of the fixing plate corresponding thereto are provided. When the support base is on the upper side, the fixing plate on which the tooth model is formed is on the lower side, and the support base is held with fingers, the dowel pin with the tooth model is fixed from the support base. This is preferable because it prevents the dental plate from falling off and damaging the tooth model. In particular, when handling a tooth profile model cut into small pieces such as the cut tooth profile model described in FIGS. 1 and 10 and the cut tooth profile model 20 of FIG. Even when the support base is held with a finger, the fixing plate with the dowel pin with the dowel pin is detached from the support base and easily falls off. It is preferable that a plurality of locking small protrusions in a row and a plurality of locking small recesses in two rows are provided on the lower surface of the fixing plate correspondingly.

  Next, embodiments of the dowel pins used in the present invention and the insertion holes provided in the support base into which the dowel pins are inserted will be described.

  The material of the dowel pin needs to be made of metal such as brass or stainless steel, and the length of the dowel pin is not particularly limited, and may be appropriately determined according to the height of the support base 10, but is generally common. A total of 18 mm to 25 mm is used for the fixing base end fixed to the fixing plate and the main body formed below the fixing base end. + Lower body portion) is generally about 13 mm to 20 mm. The length of the upper body portion of the dowel pin is preferably about 1.5 to 2.5 mm.

  A normal dowel pin with a round cross section (cross section perpendicular to the longitudinal direction) has a gradually decreasing outer diameter toward the tip of the dowel pin, except for the fixing base end. In general, the upper main body portion has a round cross section, but the lower main body portion has a flat surface portion so that the side surface of the lower main body portion is flattened to the distal end portion in the longitudinal direction. . One or two of such flat side surfaces are provided as side surfaces of the lower main body. One or two flat side surfaces are sufficient to prevent rotation, and if the number is too large, processing becomes troublesome and cost increases. According to the present invention, “the lower body portion of the dowel pin has an irregular substantially truncated cone shape in which a part of the side surface is a flat surface extending in the longitudinal direction to the tip portion of the dowel pin, and the flat surface The meaning of “having one or two side surfaces” means that the lower main body portion has a flat surface portion such that the side surface is flattened to the tip portion in the longitudinal direction. There are one or two side surfaces as the side surfaces of the lower main body. Among these “having one or two side surfaces of the flat surface”, in particular, two meanings are that the flat surface is provided in the lower body part halfway in the longitudinal direction (this is assumed to be the upper flat surface) once. The upper flat surface is extended as in the case where the flat surface is interrupted, and then a second flat surface (provided as the lower flat surface) is provided on the same plane as the upper flat surface at intervals. Assuming that it is assumed that there is no discontinuous portion, this means that it does not include a case where one flat surface is formed. “Two side surfaces of the flat surface” In other words, the meaning of having two flat side surfaces as the side surfaces of the lower main body portion means that one flat surface is assumed when one upper flat surface is extended as described above. This means that another flat surface is provided at a position where it does not become necessary. The dowel pin having a flat surface on the side surface is not particularly limited. For example, the side surface of a commercially available dowel pin in which at least a portion corresponding to the lower main body portion has a truncated cone shape is cut into a flat surface. Can be manufactured. The same applies to other embodiments.

[Fourth Embodiment (Dowel Pin and Support Base)]
FIG. 11 and FIG. 12 show an embodiment of a dowel pin used in the present invention.

  FIG. 11 is a side view of the dowel pin (positioned so that the flat surface 3 is substantially at the center of the drawing), and FIG. 12 (a) is an AA ′ view of the upper body portion 1 of the dowel pin of FIG. An end view of the cross section, FIG. 12B is an end view of the BB ′ cross section of the lower main body 2 slightly below the upper main body 1, and FIG. FIG. 12D is an end view of the DD ′ plane of the lower main body 2. Reference numeral 4 denotes a base end portion for fixing a dowel pin that has been knurled. In this embodiment, the upper main body portion 1 has a cylindrical shape, and the lower main body portion 2 has an outer diameter gradually decreasing from the upper main body portion toward the tip end portion of the dowel pin. In this case, it is an irregular substantially truncated cone shape in which a flat surface 3 extending in the longitudinal direction to the tip of the dowel pin is provided at a part of the side surface, and there is one side surface provided with the flat surface. Except for the portion of the flat surface 3, the cross-sectional shape in the direction perpendicular to the longitudinal direction of the dowel pins on the other side surface is a part of a circle (arc shape). In the present invention, such a dowel pin is formed as follows: “a fixing base end portion fixed to a fixing plate, an upper main body portion formed below the fixing base end portion, and a lower main body portion. The upper body portion of the dowel pin is cylindrical, and the lower body portion has an outer diameter gradually decreasing from the upper body portion toward the tip of the dowel pin, and the lower body portion This is referred to as a dowel pin having an irregular substantially truncated cone shape which is a flat surface extending in the longitudinal direction to the tip of the dowel pin and having one side surface of the flat surface. The reason for the “irregular substantially truncated cone shape” is that it has a flat surface and includes a case where the tip of the lower body portion is narrowed in a mountain shape. In the case of this embodiment, the shape of the flat surface 3 of the dowel pin is a mode in which the width is constant, but the shape of the flat surface 3 is not limited to this as long as the object of the present invention can be achieved, but it is not very complicated. Since the wall shape of the insertion hole of the corresponding support base becomes complicated if it is made to be a simple shape, the width is constant toward the tip of the dowel pin, both sides become linearly wider or gradually narrower, etc. A simple shape is preferable. Further, when the tip of the lower body portion of the dowel pin is narrowed in a mountain shape, the flat surface 3 may not be provided to the vicinity of the tip of the narrowed portion of the mountain shape. The case is also included in the present invention. These matters are the same for other example embodiments.

  The support base corresponding to this is not shown, but the shape of the insertion hole into which the dowel pin is inserted is an insertion hole in which the upper body portion and the lower body portion of the dowel pin can be fitted. Examples of the supporting base include the modes described in the description of FIGS. 1 to 10 and the like. In the dowel pin of this embodiment, the upper main body 1 has a cylindrical shape, and a part of the lower main body 2 has a side surface in the longitudinal direction that is a flat surface 3 extending in the longitudinal direction to the tip of the dowel pin. The insertion hole of the support base into which the dowel pin is inserted is also formed as an insertion hole having a shape that can be fitted into the dowel pin main body, so that the dowel pin is inserted into the insertion hole of the support base. Even if the fixing plate is formed by pouring gypsum to the extent that the fixing base end of the dowel pin is buried, the gypsum does not flow into the insertion hole of the support base, and the plaster does not flow into the insertion hole of the support base. The inner wall of the insertion hole corresponding to the flat surface of the side surface of the lower body portion of the dowel pin is also a flat surface, and the support base of the fixed fixing plate with the tooth model is cut. It is possible to sufficiently prevent the rotation or wobble, etc. relative to the body.

[Fifth Embodiment (Dowel Pin and Support Base)]
FIG. 13 and FIG. 14 show an embodiment in which the flat surface 3 has a flat surface whose width increases toward the tip of the dowel pin, and the side surface on which the flat surface is provided has one dowel pin. .

  FIG. 13 is a side view of the dowel pin (with the flat surface 3 positioned substantially at the center of the drawing), and FIG. 14A is an end view of the AA ′ cross section of the upper body 1. 14B is an end view of the lower main body 2 taken along the line BB ′, FIG. 14C is an end view of the lower main body 2 taken along the line CC ′, and FIG. 14D is shown. These are end views of the DD ′ plane of the lower main body 2.

  The same parts as those in FIGS. 11 and 12 are denoted by the same reference numerals, and redundant description is omitted. According to the present invention, the dowel pin of this embodiment also includes a “fixing base end portion fixed to the fixing plate, an upper main body portion formed below the fixing base end portion, and a lower portion of the upper main body portion. The upper body part of the dowel pin is cylindrical, and the lower body part has an outer diameter gradually decreasing from the upper body part toward the tip of the dowel pin, It is an example of what is called a dowel pin having an irregular substantially truncated cone shape in which a part of the side surface is a flat surface extending in the longitudinal direction to the tip of the dowel pin and having one side surface of the flat surface. .

  The support base corresponding to this is not shown, but the shape of the insertion hole into which the dowel pin is inserted is an insertion hole in which the upper body portion and the lower body portion of the dowel pin can be fitted. Examples of the supporting base include the modes described in the description of FIGS.

  In the example of the dowel pin of the fifth embodiment, the dowel pin has a shape in which the width of the flat surface 3 is widened from the boundary between the upper body portion 1 and the lower body portion 2 of the dowel pin toward the tip portion of the dowel pin. Alternatively, the dowel pin may have a shape in which the width of the flat surface 3 is narrowed from the boundary between the upper body portion 1 and the lower body portion 2 of the dowel pin toward the tip portion of the dowel pin. The support base corresponding to this is not shown, but the shape of the insertion hole into which the dowel pin is inserted is an insertion hole in which the upper body portion and the lower body portion of the dowel pin can be fitted. Examples of the supporting base include the modes described in the description of FIGS. 1 to 10 and the like.

  In the dowel pin of this embodiment, the upper main body 1 has a cylindrical shape, and the longitudinal side surface of the lower body 2 is a flat surface 3 extending in the longitudinal direction to the tip of the dowel pin. And the insertion hole of the support base into which the dowel pin is inserted is also formed in an insertion hole of a shape that can fit the dowel pin main body portion, so that the dowel pin is inserted into the insertion hole of the support base. Even if the fixing plate is formed by pouring plaster to the extent that the fixing base end is buried, the plaster does not flow into the insertion hole of the support base, but the plaster flows into the insertion hole of the support base. In addition to solving this problem, the inner wall of the insertion hole corresponding to the flat surface of the side surface of the lower body portion of the dowel pin is also a flat surface, which is opposed to the support base body of the fixing plate with the cut tooth profile model. The rotation or wobble, etc. can be sufficiently prevented that.

[Sixth Embodiment (Dowel Pin and Support Base)]
FIGS. 15 and 16 show another embodiment of the dowel pin used in the present invention.

  FIG. 15 is a side view of the dowel pin (positioned so that the flat surface 3 is substantially at the center of the drawing), and FIG. 16A is an end view of the AA ′ cross section of the upper body 1. 16B is an end view of the BB ′ cross section of the lower main body 2 slightly below the upper main body 1, and FIG. 16C is the CC ′ cross section of the lower main body 2. FIG. 16D is an end view of the DD ′ plane of the lower main body 2. The shape of the side view seen from the back side of the side view of the dowel pin of FIG. 15 is also the same as that of FIG.

  Reference numeral 4 denotes a base end portion for fixing a dowel pin that has been knurled. In this embodiment, the upper main body portion 1 has a cylindrical shape, and the lower main body portion 2 has an outer diameter larger than that of the upper main body portion 1 toward the tip end portion of the dowel pin. It is an irregular substantially truncated cone shape in which a flat surface 3, 3 'extending in the longitudinal direction to the tip of the dowel pin is provided at a part of the side surface, and the side surface on which the flat surface is provided is 3 This is a case of having two like 3 ′. Except for the flat surfaces 3 and 3 ', the cross-sectional shape in the direction perpendicular to the longitudinal direction of the dowel pins on the remaining side surfaces is a part of a circle (arc shape). In the present invention, such a dowel pin is formed as follows: “a fixing base end portion fixed to a fixing plate, an upper main body portion formed below the fixing base end portion, and a lower main body portion. The upper body portion of the dowel pin is cylindrical, and the lower body portion has an outer diameter gradually decreasing from the upper body portion toward the tip of the dowel pin, and a part of the lower body portion. This is an example of what is referred to as a dowel pin having an irregular substantially truncated cone shape whose side surface is a flat surface extending in the longitudinal direction to the tip of the dowel pin and having two side surfaces of the flat surface. In this case, the shape of the flat surface 3, 3 'of the dowel pin is a mode in which the width is constant, but the shape of the flat surface 3, 3' is not limited to this as long as the object of the present invention can be achieved, If the shape is too complex, the shape of the wall surface of the corresponding insertion hole of the support base will also be complicated. Therefore, a shape as simple as possible (flat surfaces with straight edges on both sides of the flat surface) is preferable. In addition, when the tip of the lower main body portion of the dowel pin is further narrowed in a mountain shape, the flat surface may not be provided up to the tip portion that is thin in the mountain shape. Further, in the sixth embodiment of the dowel pin, the positions of the flat surfaces 3 and 3 ′ will be described with reference to FIG. 16C, for example, in the position opposite to the flat surface 3 in FIG. 16C. The flat surface 3 'is located at a position where the positions of 3 and 3' are parallel to each other, but the positions of the flat surfaces 3 and 3 'may not be the opposite positions of the flat surfaces 3 and 3'. .

  The support base corresponding to this is not shown, but the shape of the insertion hole into which the dowel pin is inserted is an insertion hole in which the upper body portion and the lower body portion of the dowel pin can be fitted. Examples of the supporting base include the modes described in the description of FIGS. 1 to 10 and the like.

  In the dowel pin of the present embodiment, the upper main body portion 1 has a cylindrical shape, and a part of the longitudinal side surface of the lower main body portion 2 is a flat surface 3, 3 'extending in the longitudinal direction to the tip of the dowel pin. In this way, the insertion hole of the support base into which the dowel pin is inserted is also formed as an insertion hole having a shape that can be fitted into the dowel pin main body portion. Even if the fixing plate is formed by pouring gypsum into the insertion hole so that the fixing base end of the dowel pin is buried, the gypsum does not flow into the insertion hole of the supporting base, and the gypsum does not flow into the supporting base. In addition to solving the problems caused by flowing into the insertion hole, the inner wall of the insertion hole corresponding to the flat surface of the side surface of the lower body portion of the dowel pin is also a flat surface. The rotation or wobble like for Jimotodai body can be sufficiently prevented.

[Seventh Embodiment (Dowel Pin and Support Base)]
FIG. 17 and FIG. 18 show still another embodiment of the dowel pin used in the present invention).

  17 is a side view of the dowel pin (positioned so that the flat surface 3 is substantially at the center of the drawing), and FIG. 18 is a cross-sectional view of the upper main body 1 taken along the line AA ′. An end view of a cross section in a direction perpendicular to the length direction of the lower main body 2 is not shown.

  Reference numeral 4 denotes a base end portion for fixing a dowel pin that has been knurled. In this embodiment, the upper body portion 1 has a truncated cone shape whose outer diameter is slightly narrowed toward the tip of the dowel pin. Since the shape is the same as that of the dowel pins shown in FIGS. 11 and 12, the drawings corresponding to FIGS. 12B, 12C, and 12D are omitted.

  That is, in the example of the dowel pin shown in the seventh embodiment, the upper main body 1 has a truncated cone shape whose outer diameter is slightly narrowed toward the tip of the dowel pin. Is the same as the dowel pin shown in FIGS. The dowel pin shown in the seventh embodiment is as follows: “The upper body portion of the dowel pin has a truncated cone shape whose outer diameter is slightly narrowed toward the tip of the dowel pin, and the lower body portion has a tip portion of the dowel pin. The outer diameter is gradually reduced from the upper main body part, and a part of the side surface is an irregular substantially truncated cone shape that is a flat surface extending in the longitudinal direction to the tip of the dowel pin, and the side surface of the flat surface is This is an example of what is called a “dwell pin” having one.

  The ratio of the outer diameter of the upper body portion 1 being narrowed toward the tip of the dowel pin is such that the imaginary line 5 perpendicular to the upper surface 1 ′ of the upper body portion 1 and the side surface 1 ″ of the upper body portion 1 are Although it does not specifically limit by the angle (alpha) to make, about 0.5-3 degree is preferable, More preferably, it is about 1-2 degree. The angle formed between the side surface of the lower main body 2 and the imaginary line 5 is not particularly limited, but is preferably about 0.5 to 3 degrees, more preferably about 1 to 2 degrees. And the angle formed by the virtual line 5 is preferably equal to or larger than the angle formed by the virtual line 5 and the side surface 1 ″ of the upper main body 1. Here, the angle formed between the side surface of the lower main body portion 2 and the imaginary line 5 is based on the side surface where the side surface of the lower main body portion 2 is not a flat surface.

  In the example of the dowel pin of the seventh embodiment, the lower main body 2 shows the same embodiment as the dowel pin shown in FIGS. 11 and 12, but the shape of the lower main body 2 is, for example, FIG. 13, the same embodiment as the dowel pin shown in FIGS. 14 (b), 14 (c) and 14 (d), and the same dowel pin shown in FIGS. 15 and 16 (b), (c) and (d) It may be the same as in the embodiment.

  The support base corresponding to this is not shown, but the shape of the insertion hole into which the dowel pin is inserted is an insertion hole in which the upper body portion and the lower body portion of the dowel pin can be fitted. For example, the embodiment described in the description of FIGS. 1 to 10 can be given.

  In the dowel pin of this embodiment, the upper main body 1 is a truncated conical dowel pin whose outer diameter is slightly narrowed toward the tip of the dowel pin, and a part of the lower main body 2 in the longitudinal direction has a flat surface 3. The dowel pin has a flat side surface, and the insertion hole of the support base into which the dowel pin is inserted is also formed into an insertion hole having a shape into which the dowel pin main body portion can be fitted. Even if the fixing plate is formed by pouring gypsum to the extent that the fixing base end of the dowel pin is buried by inserting it into the insertion hole of the support base, the gypsum does not flow into the insertion hole of the support base. It is possible to sufficiently prevent the dowel pin from flowing into the insertion hole of the support base, and the length of the upper main body portion of the dowel pin is too long, so that the cut fixing plate can be inserted into and removed from the predetermined insertion hole of the support base It can be prevented from becoming too difficult to operate, and the inner wall of the insertion hole corresponding to the flat surface on the side surface of the lower body portion of the dowel pin is also a flat surface, and rotation and wobble of the cut fixing plate relative to the support base body Etc. can be sufficiently prevented.

  Next, an embodiment of the stopper for preventing gypsum from entering the insertion hole where the dowel pin is not inserted in the insertion hole for inserting the dowel pin of the support base used in the present invention will be described.

  2 to 5, FIG. 8, FIG. 9, and FIG. 10 exemplify a mode in which the dowel pins 8 are inserted into all the insertion holes 18 of the support base, the dowel pins are not necessarily all the insertion holes. In some cases, it may not be necessary to be inserted into the 18.

  For example, only a portion corresponding to one tooth of the tooth model is cut together with the fixing plate, and the cutting is performed in a state where the fixing plate to which the cut tooth model is bonded is supported on the upper surface of the support base. When a necessary work (for example, production of a crown prosthesis) is performed using a tooth model, dowel pins must be provided under the cut tooth model, and at least on both sides thereof. Although it is necessary to provide a dowel pin under the adjacent tooth model, it is not always necessary to provide a dowel pin under the tooth model at a position away from the tooth model to be operated. For example, when the fixing plate 106C is cut along a cutting line 74 indicated by a one-dot chain line in FIG. 10B, a substantially fan-shaped plate portion 76 is formed. One of the tooth shapes of the tooth model 104C shown in FIG. 9 is joined to the upper surface of the plate portion 76 (not shown in the figure because it is the back side of the drawing). In this way, if the tooth model that the dental technician or the like works is only the part cut along the cutting line 74, for example, the dowel pins 8 in FIG. There may be cases where dowel pins, for example, the first to third dowel pins from each end are not necessary. In such a case, there is no technical problem even if an unnecessary dowel pin is provided. However, since the dowel pin is expensive, if possible, do not provide a dowel pin in an unnecessary position. I want to do it. However, as described with reference to FIG. 7, when gypsum 52 is injected into the injection space 50 as described with reference to FIG. 7, the gypsum enters the insertion hole of the support base where the dowel pins are not inserted. When solidified, the solidified gypsum remains in the insertion hole of the support base, so that the support base made of synthetic resin cannot be reused.

  Therefore, in order to prevent gypsum from entering the insertion hole in which the dowel pin is not inserted in the insertion hole for inserting the dowel pin of the support base as described above, the stopper of the present invention is used.

  Hereinafter, various embodiments of the plug of the present invention for preventing gypsum intrusion into the insertion hole of the support base into which dowel pins are not inserted will be described with reference to the accompanying drawings. It is not limited to those described in the examples.

[Eighth embodiment (a stopper for preventing gypsum from entering the insertion hole of the support base into which dowel pins are not inserted)]
(Embodiment 8-1) FIG. 19 is a stopper according to an embodiment for preventing the gypsum from entering the insertion hole of the support base to which the dowel pin used in the present invention is not inserted (hereinafter simply referred to as “plug”). Is a side view (positioned so that the flat surface 3a is substantially at the center of the drawing), and shows the plug for the insertion hole of the support base described in the fourth embodiment. This shape and size are obtained from the upper body portion 1a and the lower body portion 2a having the same shape and the same dimensions as the dowel pin in which the fixing base end portion 4 of the dowel pin of the fourth embodiment shown in FIGS. This is a stopper 8a in which the lower main body 2a is provided with a flat surface 3a having the same shape and the same dimensions as the dowel pin of the fourth embodiment. Except for the fact that the fixing base end 4 does not exist, it has the same shape and the same dimensions as the dowel pin. Therefore, an end view of the upper main body 1a of the stopper taken along the line AA ′, and B- The end view of the B ′ cross section, the end view of the CC ′ cross section of the lower main body part 2a, and the end view of the DD ′ surface of the lower main body part 2a are respectively the same as (a) to (d) of FIG. Since it is, the illustration is omitted.

  As described above, the shape and dimensions of the stopper according to the present embodiment are the same shape and dimensions as those of the dowel pin without the fixing base end 4 of the dowel pin according to the fourth embodiment, and therefore will be described in the fourth embodiment. When inserted into the insertion hole of the support base, the size and shape of the upper body portion 1a are the same as the size and shape of the upper body portion 1 of the dowel pin of the fourth embodiment example, so that it has been described in the fourth embodiment example. For the same reason, it is possible to prevent gypsum from entering the insertion hole of the support base in which the stopper of the present case is applied.

  The material of the plug is not particularly limited as long as it is a material that can function as a plug. However, it does not need to be a high-cost metal because it does not require the strength of a dowel pin, for example, a cheaper synthetic material. Resin, not particularly limited, for example, polyethylene resin, polypropylene resin, polyamide resin, acrylic resin, polystyrene resin, polyurethane resin, other synthetic resins such as appropriate synthetic resins (calcium carbonate and other fillers, extenders, bones Including those containing materials and additives) are sufficient. Since this point is the same also in other embodiment examples, duplication description may be omitted in other embodiment examples.

  (Embodiment 8-2) Although not shown, in the case of the plug for the insertion hole of the support base of the fifth embodiment, its shape and dimensions are the same as those shown in FIGS. What is necessary is just to set it as the stopper which consists of an upper main-body part and a lower main-body part of the same shape and the same dimension as the dowel pin in which the base end part 4 for fixation of the dowel pin of the example embodiment does not exist. Except that the fixing base end 4 does not exist, it has the same shape and the same size as the dowel pin of the fifth embodiment, so that this stopper is inserted into the insertion hole of the support base described in the fifth embodiment. For the same reason as described in the fifth embodiment, it is possible to prevent gypsum from entering the insertion hole provided with the plug of the support base.

  (Embodiment 8-3) Although not shown in the same manner, in the case of the plug for the insertion hole of the support base of the sixth embodiment, its shape and dimensions are the same as those shown in FIGS. The stopper may be composed of an upper main body portion and a lower main body portion having the same shape and the same dimensions as the dowel pin in which the base end portion 4 for fixing the dowel pin of the embodiment example 6 does not exist. Except that the fixing base end 4 does not exist, it has the same shape and the same size as the dowel pin of the sixth embodiment, so that this stopper is inserted into the support base insertion hole described in the sixth embodiment. When inserted into the insertion hole, it is possible to prevent gypsum from entering the insertion hole provided with the plug of the present case of the support base for the same reason as described in the sixth embodiment.

    (Embodiment 8-4) Further, although not shown in the same manner, in the case of the plug for the insertion hole of the support base of the seventh embodiment, the shape and dimensions are shown in FIG. 17 and FIG. In addition, a plug composed of an upper main body portion and a lower main body portion having the same shape and the same dimensions as the dowel pin without the dowel pin fixing base end portion 4 described in the seventh embodiment may be used. Except that the fixing base end portion 4 does not exist, it has the same shape and the same size as the dowel pin of the seventh embodiment, so that this plug is inserted into the insertion hole of the support base described in the seventh embodiment. When inserted into the insertion hole, it is possible to prevent gypsum from entering the insertion hole of the support base in which the stopper of the present case is applied for the same reason as described in the seventh embodiment.

[Ninth embodiment (a stopper for preventing gypsum from entering the insertion hole of the support base into which dowel pins are not inserted)]
(Embodiment 9-1) FIG. 20 is a side view of a plug for preventing gypsum intrusion into an insertion hole of a support base where dowel pins used in the present invention are not inserted (the flat surface 3a is substantially in the center of the figure). Position). It is another aspect of the stopper for insertion holes of the support base explained in the fourth embodiment.

  This aspect is a plug having a shape obtained by cutting the lower main body 2a of the plug of Embodiment 8-1 described in FIG. Since this stopper also has the upper main body 1a, it is possible to prevent gypsum from entering the insertion hole of the support base where the present stopper is provided. The length of the lower main body 2a is shorter than that shown in FIG. 19, but may be longer than that shown in FIG. 20, or may be shorter than that shown in FIG. The same applies to the following Embodiments 9-2 to 9-4.) As described above, this aspect is a plug having a shape obtained by cutting the lower main body portion 2a of the plug of Embodiment 8-1 described in FIG. 19 in the middle thereof, except that the lower main body portion 2a is shortened. Since the shape, dimensions, and the like of the plug of Embodiment 8-1 described in FIG. 19 are the same, illustration of an end view of the cross section is omitted. 3a is a flat surface.

  (Embodiment 9-2) Although not shown, it is a plug for the insertion hole of the support base of the fifth embodiment, and its shape and size are the lower main body portion of the plug described in Embodiment 8-2 It is a plug of the shape cut | disconnected in the middle. Since this stopper also has an upper main body, it is possible to prevent gypsum from entering the insertion hole of the support base in which the present stopper is provided.

  (Embodiment 9-3) Although not shown, it is a plug for the insertion hole of the support base of the sixth embodiment, and its shape and size are the lower body part of the plug described in Embodiment 8-3 It is a plug of the shape cut | disconnected in the middle. Since this stopper also has an upper main body, it is possible to prevent gypsum from entering the insertion hole of the support base in which the present stopper is provided.

  (Embodiment 9-4) Although not shown, it is a plug for the insertion hole of the support base of the seventh embodiment, and its shape and size are the lower main body portion of the plug described in Embodiment 8-4 It is a plug of the shape cut | disconnected in the middle. Since this stopper also has an upper main body, it is possible to prevent gypsum from entering the insertion hole of the support base in which the present stopper is provided.

[Tenth embodiment example (a stopper for preventing gypsum from entering the insertion hole of the support base into which dowel pins are not inserted)]
(Embodiment 10-1) FIG. 21 shows a side view of an embodiment of a plug for preventing gypsum from entering the insertion hole of the support base into which dowel pins used in the present invention are not inserted. It is another aspect of the stopper for insertion holes of the support base explained in the fourth, fifth and sixth embodiments. Since the end view of the AA ′ cross section of this stopper is the same as that shown in FIGS. 12 (a), 14 (a), and 16 (a), the illustration is omitted. That is, it is cylindrical.

  That is, the stopper is composed only of the upper main body 1a of the embodiment 8-1 shown in FIG. Since this plug is also the same shape and size as the upper body portion 1 of the dowel pin described in the fourth to sixth embodiment examples, for the same reason as described in the fourth to sixth embodiment examples, It is possible to prevent gypsum from entering the insertion hole provided with the plug in this case.

  (Embodiment 10-2) Although not shown, it is a plug for the insertion hole of the support base of the seventh embodiment, and its shape and dimensions are shown in FIGS. 17 and 17 of the dowel pin of the seventh embodiment. 18 is a plug having the same shape and the same size as the upper main body 1. That is, it is a truncated cone shaped stopper. Since this plug also has the same shape as the upper body portion of the dowel pin of the seventh embodiment, it is possible to prevent gypsum from entering the insertion hole provided with the plug of the present embodiment in the support base of the seventh embodiment.

[Eleventh embodiment (a plug for preventing gypsum from entering the insertion hole of the support base into which dowel pins are not inserted and preventing the inclination of the tooth model)]
(Embodiment 11-1) FIG. 22 shows a plug (hereinafter simply referred to as “plug”) for preventing gypsum from entering the insertion hole of the support base to which dowel pins used in the present invention are not inserted and for preventing the inclination of the tooth model. Is a side view (positioned so that the flat surface 3a is substantially at the center of the lower main body portion 2a in the figure), and FIG. It is the top view seen from the head block upper part of the stopper, and shows the stopper for the insertion hole of the support base explained in the fourth embodiment. This stopper is a stopper having a shape in which a head block 5a further exists on the upper part of the upper main body 1a of the stopper shown in FIG. A plan view seen from the top of the head block 5a is shown in FIG. In FIG. 23, the position of the upper main body 1a is indicated by a dotted line 1b. The area of the plane seen from the top of the head block 5a is a head block having a larger plane area than the area of the plane of the upper end 1b of the upper main body 1a (see reference numeral 1ba). The head block is formed such that the height a1 from the upper end 1b of the upper main body 1a to the uppermost surface of the head block 5a is the same as the length of the fixing base end 4 of the dowel pin used.

  The stopper 8b having such a head block is used, for example, in the case described in FIG. 24, the dowel pin 8 is inserted into a part of the insertion hole 18 of the support base, the stopper 8a of the present invention having no head block is attached to a part of the other insertion hole 18, and the remaining insertion holes 18 are inserted. It is a disassembled perspective view for description at the time of mounting | wearing with the stopper 8b which has a head block. In FIG. 24, the same parts as those in FIGS. 9 and 10 are denoted by the same reference numerals, and description of the reference numerals is omitted.

  As shown in FIG. 24, for example, four dowel pins 8 are used in this figure and are inserted into the insertion holes 18 indicated by the arrows of the support base body 12C, and the plug 8a of the present invention is an insertion hole other than the insertion holes 18 on both sides. The case will be described assuming that the device is attached to the device. In such a case, if it is assumed that the plugs 8a are also installed in the insertion holes 18 on both sides, the upper surfaces of the plugs 8a are substantially flush with the upper wall 16C of the support base body. On the other hand, when the four dowel pins 8 are inserted into the insertion holes 18, the fixing base end 4 protrudes higher than the upper wall 16C of the support base body 12C and the upper surface of the plug 8a. In this state, as described with reference to FIGS. 5 to 7, the molding base frame 46 </ b> C is attached to the support base body 12 </ b> C, and a gypsum (not shown) is formed in the portion corresponding to the injection space 50 of FIG. 6 generated thereby. 7), and plaster is injected until the fixing base end 4 of the dowel pin 8 is completely immersed in the plaster. In the state where the plaster is not hardened, the tooth model 104C Is placed on the injected uncured fluid plaster, the fixing base ends 4 of the four dowel pins 8 protrude from the plug 8a, and the tooth model 104C may be inclined. is there. In order to prevent such inclination of the tooth model 104C, when the stopper 8b having the head block 5a of the present invention is used at an appropriate position (in the insertion holes 18 on both sides in FIG. 24), the upper part of the stopper is used. The height from the upper end 1b of the main body 1a to the uppermost surface of the head block 5a (a1 in FIG. 22) is the base end for fixing the dowel pin from the portion corresponding to the upper end of the upper main body 1 of the dowel pin 8. 4 and the top surface of the head block 5a has a larger plane area than the area of the upper surface 1b of the upper body 1a of the stopper (see 1b in FIG. 23). Since the head block includes the insertion hole 18 provided with the plugs 8a and 8b, the tooth shape model can be prevented from tilting even when the tooth shape model is placed on the uncured fluid plaster. Dowel pin 8 is inserted Gypsum can be prevented from entering the in which the insertion hole 18. Since this function is the same in other embodiments of the plug having the head block, the description of this function is omitted in the following embodiments. After the injected plaster has not hardened, do not place a tooth model on it, but once the injected plaster has been hardened into a fixing plate, fix the tooth model with an appropriate adhesive. In this case, the plug 8a without the head block described above may be used without using the plug 8b having the head block. This also applies to the plugs of the other embodiments.

  Moreover, the area of the plane seen from the upper part of the head block in the plug with the head block is larger than the area of the plane of the upper end 1b (shown by reference numeral 1b in FIG. 23) of the upper main body 1a of the plug. Having a flat area is necessary to support the lower surface of the tooth model. The area of the plane seen from the top of the head block is shown in FIG. 25 and FIG. 26 on the top view of the support base of the dental technician's work model shown in FIG. 8 (a) and FIG. 10 (a). Although the regions surrounded by dotted lines such as P1, P2, P3, P4 and P5, P6, P7, P8 are shown in FIG. The lines P1-P2, P3-P4, P5-P6, and P7-P8 are lines that equally divide between the adjacent insertion holes 18, and accordingly, between P2-P3 and between P1-P4, or P5- The width between P8 and P6-P7 (corresponding to length b1 in FIG. 23) may be larger, but if it is too large, a plug with a head block is inserted into the adjacent insertion hole 18 as well. When the head blocks are overlapped with each other, it is necessary to reduce a part of the overlapping portions of the head blocks to reduce the area. On the other hand, the length in the direction perpendicular to the above, the length between P1 and P2, between P3 and P4, between P5 and P6, and between P7 and P8 (corresponding to the length c1 in FIG. 23) is within the range shown in the figure. That is, it is within the range of the width of the support base. Within the above range, for example, in the manufacturing process shown in FIG. 24, the head block does not protrude from the molding base frame 46 </ b> C, which is preferable.

  That is, the area of the plane viewed from the top of the head block has a plane area larger than the area of the plane of the upper end 1b (shown by reference numeral 1b in FIG. 23) of the upper main body 1a of the stopper, and , P1, P2, P3, P4, P5, P6, P7, P8, and the like are preferably equal to or smaller than those surrounded by dotted lines. The same applies to other embodiments of the plug with head block. For example, if there is a locking protrusion (in this case, a locking small protrusion 33 or 33C, etc.) on the support base of the dental technician work model shown in FIGS. The size may be appropriately determined within the above range, such as a slightly smaller head block so that the partial blocks do not overlap. In addition, as described above, the planar shape of the head block is not limited to a quadrangular shape as long as the tooth shape model can be prevented from tilting even if the tooth shape model is placed. Polygons, indefinite shapes, etc. are arbitrary. This also applies to other embodiments of the head block stopper. In addition, when there is no locking projection or the like on the support base of the dental technician work model, or there is a locking recess, the head is placed on the locking projection as described above. There is no need to make the head block slightly smaller so that the partial blocks do not overlap, but a smaller head block may be used if it is the size necessary to prevent the tooth model from tilting. Of course.

  As described above, the shape and dimensions of the stopper of this embodiment are the same as those of the dowel pin without the dowel pin fixing base end 4 of the fourth embodiment except that the head block is formed. Since it is the same size or the same shape as the plug 8a of the embodiment 8-1 shown in FIG. 19, when it is inserted into the insertion hole of the support base described in the fourth embodiment, the dimensions of the upper main body 1a Since the shape is the same as the size and shape of the upper body portion 1 of the dowel pin of the fourth embodiment, the insertion of the support base with the plug of this case is performed for the same reason as described in the fourth embodiment. Intrusion of gypsum into the hole can be prevented. Moreover, it is preferable to prevent the inclination of the tooth profile model when a dental work model is prepared by placing the tooth profile model on an uncured fluid plaster.

  Further, the upper main body portion and the lower main body portion may have a shape in which the lower main body portion 2a of the plug of FIG. 22 is cut halfway as shown in FIG. As shown in the side view in FIG. 28, the stopper with a block may be in the form of a stopper with a head block 8b having only the upper body part 1a and the head block 5a without the lower body part in the stopper of FIG.

  In addition, the material of the plug with the head block is not particularly limited as long as it is a material that can exhibit the function as a plug, but it does not need to be a metal with high cost because it does not require strength like a dowel pin, for example, Cheaper synthetic resins, such as, but not limited to, polyethylene resins, polypropylene resins, polyamide resins, acrylic resins, polystyrene resins, polyurethane resins, other synthetic resins, and other suitable synthetic resins (calcium carbonate and other fillers) , Including those containing bulking agents, aggregates, additives, etc.). Since this point is the same also in other embodiment examples, duplication description may be omitted in other embodiment examples.

  (Embodiment 11-2) Although not shown, in the case of a stopper with a head block for the insertion hole of the support base of the fifth embodiment, the shape and dimensions of the upper body part and the lower body part May be a plug composed of an upper main body portion and a lower main body portion having the same shape and the same dimensions as the dowel pin in which the fixing base end portion 4 of the dowel pin of the fifth embodiment shown in FIGS. 13 and 14 is not present. . The shape of the head block can be the same as that described in Embodiment 11-1. When this stopper is inserted into the insertion hole of the support base described in the fifth embodiment, the same function as described in the above embodiment 11-1 can be exhibited.

  Similarly to the case of FIGS. 27 and 28, the upper main body portion and the lower main body portion may have a shape obtained by cutting the lower main body portion in the middle thereof, or there is no lower main body portion and only the upper main body portion and the head block. It is good also as a form of the stopper with a head block which consists of.

  (Embodiment 11-3) Although not shown in the same manner, in the case of a plug with a head block for the insertion hole of the support base of the sixth embodiment, the shape of the upper body part and the lower body part 15 and FIG. 16, the stopper is composed of an upper main body portion and a lower main body portion having the same shape and the same dimensions as the dowel pin in which the dowel pin fixing base end portion 4 of the sixth embodiment shown in FIGS. That's fine. The shape of the head block can be the same as that described in Embodiment 11-1. When this stopper is inserted into the insertion hole of the support base described in the sixth embodiment, the same function as described in the above embodiment 11-1 can be exhibited.

  Similarly to the case of FIGS. 27 and 28, the upper main body portion and the lower main body portion may have a shape obtained by cutting the lower main body portion in the middle thereof, or there is no lower main body portion and only the upper main body portion and the head block. It is good also as a form of the stopper with a head block which consists of.

  (Embodiment 11-4) Further, although not shown in the same manner, in the case of a stopper with a head block for the insertion hole of the support base of the seventh embodiment, its upper body part and lower body part The shape and dimensions of the upper body portion and the lower body portion are the same shape and the same dimensions as the dowel pins without the dowel pin fixing base end portion 4 described in the seventh embodiment shown in FIGS. The plug should be The shape of the head block can be the same as that described in Embodiment 11-1. When this plug is inserted into the insertion hole of the support base described in the seventh embodiment, the same function as described in the above embodiment 11-1 can be exhibited.

  Similarly to the case of FIGS. 27 and 28, the upper main body portion and the lower main body portion may have a shape obtained by cutting the lower main body portion in the middle thereof, or there is no lower main body portion and only the upper main body portion and the head block. It is good also as a form of the stopper with a head block which consists of.

[Twelfth embodiment example (a stopper for preventing gypsum from entering the insertion hole of the support base into which dowel pins are not inserted and preventing the inclination of the tooth model)]
(Embodiment 12-1) FIG. 29 shows a plug (hereinafter simply referred to as “plug” for preventing gypsum from entering the insertion hole of the support base to which the dowel pin used in the present invention is not inserted and for preventing the inclination of the tooth model. FIG. 30 is a side view of an embodiment of the present invention (which is positioned so that the flat surface 3a is substantially at the center of the lower main body 2a in the drawing). It is the top view seen from the head block upper part of the stopper, and shows the stopper for the insertion hole of the support base explained in the fourth embodiment. This plug is the same as the plug with head block shown in FIG. 22 except that the shape of the head block is different. Therefore, the same reference numerals as those in FIG. In addition, duplicate explanation is omitted.

  29 and 30, the head block 5 a is configured such that the bottom surface of the stopper head block 5 a comes into contact with the locking protrusion even when the supporting base on which the locking protrusion is present is plugged. The head block of the aspect which provided the notch part 5b higher than the height of a latching protrusion in the position corresponding to the position where the protrusion for latching of a support base exists so that a part block may not incline. It is a stopper. The height e1 of the notch may be set to be higher than the height of the locking projection of the support base to be used. The width f1 of the cutout may be a width from the position where the locking protrusion of the support base is present to the position where it enters the upper main body 1a side.

  This plug with a head block can also be used as a plug for a support base having a locking protrusion on the support base, but there is no locking protrusion or there is a locking recess. It can also be used for supporting bases.

  When this plug is inserted into the insertion hole of the support base described in the fourth embodiment, the same function as described in the above embodiment 11-1 can be exhibited.

  Further, the upper main body portion and the lower main body portion may have a shape in which the lower main body portion 2a of the plug of FIG. 29 is cut in the middle thereof, as shown in the side view of the stopper with plug 8b in FIG. As shown in the side view in FIG. 32, the stopper with a block may have a form of a stopper 8b with a head block which is not provided with a lower main body portion but includes only an upper main body portion 1a and a head block 5a. For example, when these plugs are also inserted into the insertion holes of the support base described in the fourth embodiment, the same functions as described in the above embodiment 11-1 can be exhibited.

  (Embodiment 12-2) Although not shown, in the case of a plug with a head block for the insertion hole of the support base of the fifth embodiment, the shape and dimensions of the upper body part and the lower body part May be a plug composed of an upper main body portion and a lower main body portion having the same shape and the same dimensions as the dowel pin in which the fixing base end portion 4 of the dowel pin of the fifth embodiment shown in FIGS. 13 and 14 is not present. . The shape of the head block can be the same as that described in Embodiment 12-1. When this plug is inserted into the insertion hole of the support base described in the fifth embodiment, the same function as described in the above embodiment 12-1 can be exhibited.

  Further, the upper main body part and the lower main body part may have a shape obtained by cutting the lower main body part in the middle thereof as in the case of FIGS. 31 and 32, or there is no lower main body part and only the upper main body part and the head block. It is good also as a form of the stopper with a head block which consists of (it becomes the same as the stopper of FIG. 32 in this case).

  (Embodiment 12-3) Although not shown in the same manner, in the case of a stopper with a head block for the insertion hole of the support base of the sixth embodiment, the shape of the upper body part and the lower body part 15 and FIG. 16, the stopper is composed of an upper main body portion and a lower main body portion having the same shape and the same dimensions as the dowel pin in which the dowel pin fixing base end portion 4 of the sixth embodiment shown in FIGS. That's fine. The shape of the head block can be the same as that described in Embodiment 12-1. When this stopper is inserted into the insertion hole of the support base described in the sixth embodiment, the same function as described in the above embodiment 12-1 can be exhibited.

  Further, the upper main body part and the lower main body part may have a shape obtained by cutting the lower main body part in the middle thereof as in the case of FIGS. 31 and 32, or there is no lower main body part and only the upper main body part and the head block. It is good also as a form of the stopper with a head block which consists of (it becomes the same as the stopper of FIG. 32 in this case).

  (Embodiment 12-4) Further, although not shown in the same manner, in the case of a stopper with a head block for the insertion hole of the support base of the seventh embodiment, the upper main body portion and the lower main body portion The shape and dimensions of the upper body portion and the lower body portion are the same shape and the same dimensions as the dowel pins without the dowel pin fixing base end portion 4 described in the seventh embodiment shown in FIGS. The plug should be The shape of the head block can be the same as that described in Embodiment 12-1. When this plug is inserted into the insertion hole of the support base described in the seventh embodiment, the same function as described in the above embodiment 12-1 can be exhibited.

  Further, the upper main body part and the lower main body part may have a shape obtained by cutting the lower main body part in the middle thereof as in the case of FIGS. 31 and 32, or there is no lower main body part and only the upper main body part and the head block. It is good also as a form of the stopper with a head block which consists of.

[Thirteenth embodiment (plug for preventing gypsum from entering the insertion hole of the support base into which dowel pins are not inserted and for preventing the inclination of the tooth model)]
(Embodiment 13-1) FIG. 33 shows a plug (hereinafter simply referred to as “plug”) for preventing gypsum from entering the insertion hole of the support base to which dowel pins used in the present invention are not inserted and for preventing the inclination of the tooth model. Is a side view (positioned so that the flat surface 3a is substantially at the center of the lower main body 2a in the figure), and FIG. It is the top view seen from the head block upper part of the stopper, and shows the stopper for the insertion hole of the support base explained in the fourth embodiment. This plug is the same as the plug with head block shown in FIG. 22 except that the shape of the head block is different. Therefore, the same reference numerals as those in FIG. In addition, duplicate explanation is omitted.

  In FIGS. 33 and 34, the head block 5a is configured such that the bottom surface of the head block of the stopper comes into contact with the locking protrusion even when the support base having the locking protrusion is plugged. In order to prevent the block from tilting, the stopper 6a is provided with a base 6a higher than the height of the locking projection, and the lower surface of the head block 5a is kept at a height that does not contact the locking projection. . The base portion 6a is not particularly limited, but is preferably a plug having a head block having a shape substantially the same as that of the upper main body portion 1a and provided on the upper main body portion 1a. . The planar shape of the upper end portion 6b of the base portion 6a is indicated by a dotted line in FIG. The height h1 of the base part 6a may be higher than the height of the locking projection of the supporting base used. However, the height a1 from the upper end 1b of the upper main body 1a to the uppermost surface of the head block 5a is the dimension from the portion corresponding to the upper end 1b of the upper main body 1a to the base end for fixing the dowel pin ( It is a stopper with a head block that is the same as the length.

  Briefly described, the upper main body 1a extends further upward as a base 6a by a height h1, but the height from the upper end 1b of the upper main body 1a to the top surface of the head block 5a. For example, a1 is the same as the height a1 from the upper end 1b of the upper main body 1a shown in FIG. 22 to the uppermost surface of the head block 5a, so that the thickness of the head block 5a is equal to the head shown in FIG. This is a mode in which the thickness is reduced by h1 from the thickness a1 of the block 5a.

  When this plug is inserted into the insertion hole of the support base described in the fourth embodiment, only the lower main body portion 2a and the upper main body portion 1a enter the insertion hole 18 of the support base into the insertion hole. The head block 5a including 6a is positioned above the upper wall 16C of the support base. Accordingly, the presence of the upper body portion 1a of the stopper can prevent gypsum from entering the insertion hole of the support base in which the present stopper is provided. The height from the upper wall 16C of the support base to the uppermost surface of the head block 5a is a1, and a1 is the same as the length of the fixing base end 4 of the dowel pin to be used. It is possible to prevent the inclination of the tooth profile model when a dental technician work model is created by placing the tooth profile model on a plaster. In addition, since the head block is a stopper with a head block formed so that the lower surface of the head block does not come into contact with the locking protrusion, this stopper with the head block has a locking protrusion or the like. Even when the supporting base is plugged, the bottom surface of the head block of the plug does not come into contact with the locking projection and the head block does not tilt. Since this function is the same in the following embodiments, description of this function is omitted in the following embodiments. Although not particularly limited, the lower main body 2a, the upper main body portion 1a, the base portion 6a, and the head block 5a of the plug 8b are usually integrally formed as a plug 8b.

  The stopper with a head block of this aspect can be used as a stopper for a support base having a locking protrusion on the support base, but there is no locking protrusion or the locking recess. Can also be used for support bases with This point is the same in the head block stopper of the subsequent embodiment, and therefore, a duplicate description of this point is omitted in the subsequent embodiment.

  Further, in the plug of the above aspect, the upper main body portion and the lower main body portion are formed by cutting the lower main body portion 2a of the plug shown in FIG. Alternatively, as shown in the side view of the stopper with the block in FIG. 36, the stopper in FIG. 33 does not have the lower main body, and is composed only of the upper main body 1a, the base 6a, and the head block 5a. It is good also as a form of the attached stopper 8b. For example, when these plugs are also inserted into the insertion holes of the support base described in the fourth embodiment, the same functions as described above can be exhibited.

  (Embodiment 13-2) Although not shown, in the case of a plug with a head block for the insertion hole of the support base of the fifth embodiment, the shape and dimensions of the upper body part and the lower body part May be a plug composed of an upper main body portion and a lower main body portion having the same shape and the same dimensions as the dowel pin in which the fixing base end portion 4 of the dowel pin of the fifth embodiment shown in FIGS. 13 and 14 is not present. . The shapes of the head block 5a and the base 6a can be the same as those described in the embodiment 13-1. When this plug is inserted into the insertion hole of the support base described in the fifth embodiment, the same function as described in the above embodiment 13-1 can be exhibited.

  Further, the upper main body part and the lower main body part may have a shape obtained by cutting the lower main body part in the middle thereof as in the case of FIG. 35 or FIG. It is good also as a form of the stopper with a head block which consists of (it becomes the same as the stopper of FIG. 36 in this case).

  (Embodiment 13-3) Although not shown in the same manner, in the case of a stopper with a head block for the insertion hole of the support base of the sixth embodiment, the shape of the upper body part and the lower body part 15 and FIG. 16, the stopper is composed of an upper main body portion and a lower main body portion having the same shape and the same dimensions as the dowel pin in which the dowel pin fixing base end portion 4 of the sixth embodiment shown in FIGS. That's fine. The shapes of the head block and the pedestal can be the same as those described in Embodiment 13-1. When this stopper is inserted into the insertion hole of the support base described in the sixth embodiment, the same function as described in the above embodiment 13-1 can be exhibited.

  Further, the upper main body part and the lower main body part may have a shape obtained by cutting the lower main body part in the middle thereof as in the case of FIG. 35 and FIG. 362, or there is no lower main body part and only the upper main body part and the head block. It is good also as the form of the stopper with a head block which consists of (it becomes the same as the stopper of FIG. 36 in this case).

  (Embodiment 13-4) Further, although not shown in the same manner, in the case of a stopper with a head block for the insertion hole of the support base of the seventh embodiment, its upper main body and lower main body The shape and dimensions of the upper body portion and the lower body portion are the same shape and the same dimensions as the dowel pins without the dowel pin fixing base end portion 4 described in the seventh embodiment shown in FIGS. The plug should be The shape of the head block can be the same as that described in Embodiment 13-1. Moreover, the shape of a base part is a column shape which has the same planar shape as the upper surface 1 'of the upper main body part 1 of FIG. 17, for example, and has the height of h1 demonstrated in the said Embodiment 13-1. It can be.

  When this plug is inserted into the insertion hole of the support base described in the seventh embodiment, the same function as described in the above embodiment 13-1 can be exhibited.

  Further, the upper main body part and the lower main body part may have a shape obtained by cutting the lower main body part in the middle thereof as in the case of FIGS. 35 and 36, or there is no lower main body part and only the upper main body part and the head block. It is good also as a form of the stopper with a head block which consists of.

  INDUSTRIAL APPLICABILITY The present invention is useful as a support base having a dowel pin of a dental technician work model and its insertion hole, and as a stopper used to prevent gypsum from entering the insertion hole, and a dental technician work model using these It can be usefully used to create

DESCRIPTION OF SYMBOLS 1 Upper body part of dowel pin 2 Lower body part of dowel pin 3, 3 'Flat surface of dowel pin 4 Base end part for fixing of dowel pin 1' Upper surface of upper body part 1 of dowel pin 1 "of upper body part 1 of dowel pin Side surface 5 Virtual line 102, 102 C dental work model 104, 104 C dental model 106, 106 C fixing plate 8 dowel pin 10, 10 C support base 12, imaginary line perpendicular to upper surface 1 ′ of upper body portion 1 of dowel pin 12C Support base body 14 Peripheral side wall 16 Upper wall 18 Insertion hole 20 Space 22 Cylindrical protrusion 24 Locking protrusion 25 Locking protrusion 33, 33C Locking small protrusion 34 Position identification protrusion 36 Stop recess 37 Locking recess 45, 45C Locking recess 46, 46C Molding base frame 50 Injection space 52 Gypsum 1a Upper body 1b The upper end of the upper portion 2a lower body portion 3a flat surface 8a stopper 8b stopper 5a head block 5b cut out portions 6a stand portion 6b base part having a head block of the main body portion

Claims (7)

A support base made of a synthetic resin provided with a metal dowel pin to be planted on a fixing plate formed of gypsum to which the tooth model is fixed, and an insertion hole into which the dowel pin is inserted. Because
The dowel pin includes a fixing base end fixed to the fixing plate, an upper main body formed below the fixing base end, and a lower main body formed below the upper main body. The upper body portion of the dowel pin is a columnar shape or a truncated cone shape whose outer diameter is slightly narrowed toward the tip of the dowel pin, and the lower body portion has an outer diameter upward toward the tip of the dowel pin. It is gradually reduced from the main body, and a part of the side surface of the lower main body has an irregular substantially truncated cone shape that is a flat surface extending in the longitudinal direction to the tip of the dowel pin, and has one side surface that is the flat surface. Or have two,
The support base formed of the synthetic resin has an insertion hole in which the dowel pin is inserted into an insertion hole in which the upper body portion and the lower body portion of the dowel pin can be fitted. A dowel pin used in a dental dental work model and a support base into which the dowel pin is inserted.   The length of the upper body portion of the dowel pin is 1.5 to 2.5 mm, and the support base has an insertion hole shape into which the dowel pin is inserted, and the upper body portion and the lower body portion of the dowel pin are fitted. The dowel pin used for the dental technician working model according to claim 1, and a support base into which the dowel pin is inserted.   The dowel pin is a dowel pin whose upper body part is a truncated cone shape whose outer diameter is slightly narrowed toward the tip of the dowel pin, and the degree to which the outer diameter is narrowed is 0.5-3 in terms of the angle toward the tip. The support base is a support base having an insertion hole in which the shape of the insertion hole into which the dowel pin is inserted can be fitted into the upper main body portion and the lower main body portion of the dowel pin. A dowel pin used in the working model for dental technician according to any one of 1 and 2, and a support base into which the dowel pin is inserted.   When using a fixing plate in which a locking recess or protrusion is provided on the opposite surface of the support base in the fixing plate, the support base is provided with a locking recess or protrusion on the fixing plate. A locking projection or recess that can be fitted into the locking recess or projection provided on the surface facing the fixing plate is provided on the surface side of the support base at a position corresponding to the position where it is positioned. The dowel pin used for the working model for dental technicians according to any one of claims 1 to 3, and a support base into which the dowel pin is inserted. A stopper for preventing gypsum from entering an insertion hole into which the dowel pin is not inserted in the insertion hole for inserting the dowel pin of the support base according to any one of claims 1 to 4, Is
A stopper (A) comprising an upper main body portion and a lower main body portion having the same shape and dimensions as those of the dowel pin without a fixing end portion for fixing the dowel pin according to any one of claims 1 to 3.
Or, the plug (B) comprising the upper main body portion and the lower main body portion of the shape in which the lower main body portion of the plug (A) is cut and shortened in the middle of the length direction,
Or the plug (C) consisting only of the upper main body of the plug (A)
Alternatively, a plug in which a head block is further formed following the upper end portion of the upper body portion of any one of the plugs (A) to (C), and is a plane viewed from the top of the head block. The area is a head block having a plane area larger than the plane area of the upper end portion of the upper body portion of the stopper, and the top surface of the head block from the portion corresponding to the upper end portion of the upper body portion of the stopper. The head block stopper with the same dimensions as the length of the base end for fixing the dowel pin (D)
A stopper for preventing gypsum from entering an insertion hole into which a dowel pin is not inserted in the insertion hole for inserting a dowel pin in a support base, which is any of the above.   The plug with head block (D) according to claim 5 is applicable to a case where a support base having a locking projection provided on the surface of the support base is used. When a stopper is attached to the insertion hole, a notch is formed on the lower surface of the head block at least in a portion where the locking projection is present so that the lower surface of the head block does not contact the locking projection. The head block plug (D) is provided, or is a head block stopper (D) formed by maintaining the lower surface of the head block at a height that does not contact the locking projection. 5. A stopper for preventing gypsum from entering according to 5.   The plug for preventing gypsum intrusion according to any one of claims 5 and 6, wherein the stopper is a stopper made of a synthetic resin.

Images