JP2012213668A - Fitting device for dental working model, and manufacturing method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting device for a dental working model by which the area of a joint surface with a working base can sufficiently be ensured, and a prosthesis object of high precision can be manufactured, and to provide a manufacturing method for the fitting device, and also, to provide the fitting device which can simply be removed from a dental articulation device in a short period of time after the completion of the manufacture of the prosthesis object by minimizing the using amount of gypsum when the prosthesis object is fitted on the dental articulation device.SOLUTION: The fitting device 100 for dental working model includes: a divided plate 102 on which an impression model 101 is mounted; a supporting base 103 which is connected with the divided plate; and a fitting base 140 including a fitting protruding section 142 which is fitted in a recess section 135 being formed on the lower surface of the supporting base 103. The supporting base 103 includes a hole 106 for pin insertion in which the pin 114 of the divided plate is freely removably inserted. The divided plate 102 is connected with a determined location of the supporting base by placing the pin in the hole for pin insertion. Also, the fitting base 140 is connected with the supporting base 103 by fitting the fitting protruding section 142 of the fitting base 140 in the recess section 135 which is formed on the lower surface of the supporting base to constitute the fitting device for dental working model.

Description

  The present invention relates to a dental work model fitting device used for dental work such as production of a dental prosthesis and the like, and a method of manufacturing the same.

When part or most of the tooth quality of a human tooth is missing due to caries or other causes, the crown to be treated is cut on all sides and coated with cast metal, It is necessary to restore mastication and other physiological functions. For this purpose, the restoration has a complicated form and must satisfy various requirements, so that the restoration cannot be produced directly in the oral cavity. For this reason, the restoration must be manufactured outside the oral cavity, and in order to manufacture the restoration, a working model that reproduces the state in the oral cavity outside the oral cavity is required. The working model must accurately reproduce the abutment tooth, dentition, missing part, and other oral forms.
Conventionally, when producing a dental prosthesis, as shown in FIG. 33 and FIG. 34, (1) pouring gypsum based on the denture shape taken from the patient's oral cavity, and flattening the bottom surface after curing, to make a composite for dental work. (2) After forming anti-rotation grooves 1013 on the base surface 1012 as necessary, (3) drilling holes in the base surface to place the dowel pins 1011 in parallel with each other on the base surface. Each hole is planted with an adhesive or the like, and a release agent (for example, a surfactant) is applied to the base surface and the dowel pins 1011. (4) Thereafter, gypsum (secondary gypsum) is poured into a base silicone rubber mold or the like (not shown), and the work base portion 1003 is made by a method such as burying the portion of the dowel pin 1011. ) After the secondary gypsum is cured, the periphery is shaved until the joint surface 1012 of the double model 1001 and the working base 1003 can be confirmed. (6) After that, as shown in FIG. 34, perpendicularly to the joint surface 1012 from above the double model 1001 so that both sides of the abutment tooth C of the double model 1001 are parallel to the dowel pin 1011. Cutting is performed by the plaster saw 9 shown in FIG.
Through the above operation steps, the abutment tooth C can be extracted and returned to a fixed position with respect to the double model 1001, and the abutment tooth C can be inserted and removed from the support base 1003. Make a model.
The said work process is a work process of the impression model preparation for dental work implemented in the case where a prosthesis preparation is required.
In addition to this method, as in the newly-developed patent No. 4405931, the work process is performed by laminating a plate called a land in which dowel pins are planted on a plastic base instead of secondary plaster. (3) A method of manufacturing by a process that omits (4) has been devised.

Japanese Patent No. 4127732 Japanese Patent Laid-Open No. 5-96676 Japanese Patent No. 4405931

  However, in the cutting method for cutting out the abutment tooth C, as shown in FIG. 33, both sides of the abutment tooth C are parallel to the dowel pin 1011 and perpendicular to the joint surface 1012 by a saw 9 from above. The dental work model was manufactured by cutting and securing the area of the basal plane 1012. However, as shown in FIG. 33, the cutting method in one step of cutting along the line D from the top as described above is suitable for the case of a normal dentition with few irregularities as described above. However, in the case of an incorrect dentition having irregularities in the dentition as shown in FIG. 34, which is particularly a case prone to tooth decay and a prosthesis, both sides of the abutment tooth C are connected to the joint surface. In many cases, up to 1012 must be cut obliquely by a saw 9 as shown by line B in FIG. 34. As shown in FIG. 35E and FIG. In the work process, the vicinity of the dowel pin 1011 must be cut, and the abutment tooth C and the dowel pin standing on the adjacent tooth are damaged. Or in the conventional cutting method which cut | disconnects in 1 process, it is inevitable that the area of the base face of the double model 1001 will become small as shown to FIG. 35A and FIG. 35B.

  In order to ensure the area of the joint surface 1012 as wide as possible, there is only a method of cutting down by changing the direction using the stress of the saw 9 during the cutting, and cutting is performed in the same manner as the line B shown in FIG. As a result, it is inevitable that the area of the base surface 1012 of the abutment tooth C is extremely small as shown in FIG. 35A. In particular, as shown in FIG. 35C including FIG. 35B and the adjacent surface of FIG. 35D which is a cut surface in line B, the area of the basal plane 1012 of the abutment tooth C is much wider than that in FIG. 35C. It is difficult to ensure a sufficient area of the basal plane 1012 necessary during the dental work while being narrow, and it is difficult to return the abutment teeth to a stable position.

  The double model 1001 is made of gypsum that may crack, chip, or collapse, and it is difficult to ensure a sufficient base surface 1012 in a stable manner. In order to produce a high prosthesis 7, there is a problem that it is a dental technician work requiring skill. In addition, there are problems such as cracking, chipping, and breaking during the prosthesis manufacturing operation, and there is also a problem that waste waste is generated after the prosthesis is manufactured.

  In preparing the dental work model, the abutment tooth C described in FIG. 33 (normal dentition) and FIG. 34 (unusual dentition) can be easily inserted and removed, and the abutment tooth C is positioned at the fixed position of the double model 1001. It is indispensable to be able to return to a stable state in the work process for producing the dental prosthesis 7. This is because the prosthesis 7 produced with a highly accurate dental work model leads to the production of a highly accurate prosthesis that does not require adjustment at the medical site when set in the oral cavity. At the same time, since the impression model is used for fine adjustment and finishing in the medical field, particularly in the case of an irregular dentition having irregularities as shown in FIG. 34, the above-mentioned defects are caused by the produced prosthesis. It becomes a big obstacle about conformity.

The working model for producing the prosthesis must be a reproduction of the abutment teeth, dentition, missing part and other oral forms. However, manufacturing a working model using the conventional manufacturing method tends to cause the positional relationship between the tooth profile and the dentition model to be confused, increasing the number of complicated manufacturing procedures and operations, and the occlusal relationship between the dentition model and the opposite dentition model. In order to reproduce accurately, there are many disadvantages that many manual operations that require skill and time are required, and workability is poor.
In addition, the work model for prosthesis fabrication is attached to the articulator with plaster to reproduce the jaw engagement due to jaw movement during prosthesis fabrication, but it is removed from the articulator after the prosthesis fabrication is complete. Dispose of gypsum as industrial waste. There is a disadvantage that the burden of working time and processing costs at this time is large.

The present invention solves the problems as described above, and can secure a sufficient area of the joint surface with the work base without damaging the pins even in the case of an incorrect dentition, thereby producing a highly accurate prosthesis. It is an object of the present invention to provide a dental work model and its manufacturing method, and a dental work model fitting device and its manufacturing method.
In addition, by minimizing the amount of gypsum used when the prosthesis is installed, the fitting device can be removed from the articulator in a short time after the prosthesis has been manufactured. It is an object of the present invention to provide a fitting device that can reduce costs.

A dental work model fitting device according to the present invention includes a split plate on which an impression model is placed, a support base connected to the split plate, and a recess formed on a lower surface of the support base. A fitting base having a fitting convex portion to be fitted is provided, and the split plate is provided with a plurality of pins on a surface joined to the support base, and the support base is inserted so that the pins can be inserted and removed. A pin insertion hole, a pin is inserted into the pin insertion hole, the dividing plate is connected to a fixed position of the support base, and the fitting base is fitted into a recess formed on the lower surface of the support base. It is a dental work model fitting device configured to fit a mating convex portion and connect the fitting base to a support base.
According to a second aspect of the present invention, there is provided a dental work model fitting device comprising: a resin support base; and a resin split having a plurality of pins connected to a fixed position of the support base so as to be detachable at a lower position. A plate, an impression model placed on the divided plate, and a fitting base having a fitting convex part closely fitted in a concave part on the lower surface of the supporting base, the supporting base including the pin Is provided with a pin insertion hole to be inserted and removed, and a pin is inserted into the pin insertion hole to connect the divided plate to a fixed position of the support base, and a recess formed on the lower surface of the support base. It is the fitting apparatus of the dental work model comprised so that the fitting convex part of a fitting base may be fitted to a part, and a fitting base may be connected with a support base.
A fitting apparatus for a dental work model according to claim 3 of the present invention includes a resin-made support base, and a divided plate having a plurality of pins at the lower part thereof connected so as to be detachable from a fixed position of the support base, An impression model placed on the divided plate, and a fitting base having a plurality of fitting pinching portions for fixing firmly to the four corners of the supporting base, the supporting base can be inserted and removed pins It has a pin insertion hole to be inserted, a pin is inserted into this pin insertion hole, the divided plate is connected to a fixed position of the support base, and the corner of the support base is connected to the fitting clamp part of the fitting base. It is a dental work model fitting device configured to fit and fix the fitting base to the support base.
According to a fourth aspect of the present invention, there is provided a dental work model fitting device having an upper surface that is slightly larger than the lower surface of the support base, and holding convex portions extending across both ends of the short end at both ends of the bottom surface. 4. The apparatus according to claim 1, further comprising an adhesive convex portion provided on the lower surface, and further comprising a separation plate made of a flexible material to be fitted to the adhesive convex portion. This is a fitting device for a dental work model.
In the dental work model fitting device according to claim 5 of the present invention, the fitting base is fitted and clamped for fitting the corner of the support base to the upper surface thereof to fix the support base. The dental work model fitting device according to any one of claims 1 to 4, wherein a protruding portion is provided.
According to a sixth aspect of the present invention, there is provided the dental work model fitting device, wherein a convex portion is provided on either the upper surface of the support base or the lower surface of the split plate, and the upper surface of the support base and the split plate The dental work model fitting device according to any one of claims 1 to 5, wherein a concave portion corresponding to the convex portion is provided on any of the lower surface.
In a dental work model fitting device according to a seventh aspect of the present invention, the support base is provided with a plurality of saw standby grooves on a surface joined to the divided plate. A dental work model fitting device according to any one of the above.
In the dental work model fitting device according to claim 8 of the present invention, the dividing plate is provided with a plurality of saw guide grooves on the surface joined to the support base, and / or the support base is A plurality of saw standby grooves are provided on a surface joined to the split plate, and the saw guide groove of the split plate and the saw standby groove of the support base are opposed to each other. It is a fitting apparatus of the dental work model in any one of Claim thru | or 7.
According to a ninth aspect of the present invention, there is provided a dental work model manufacturing method comprising: inserting a pin into a pin insertion hole that is inserted so that the pin can be inserted and removed; and arranging the divided plate at a fixed position of the support base. Step and fixing the impression model to the divided plate with the adhesive, the second step, and placing the saw along the groove for standby of the support base, facing both sides of the impression model abutment tooth, sawing the divided plate Rounding up from the guide groove to the split transition part near the neck of the impression model, the third process, and cutting down from the upper part on both sides of the abutment tooth of the impression model to the split transition part of the third process, rounding up in the third process A method for manufacturing a dental work model, comprising a fourth step of connecting to a cut portion.
According to a tenth aspect of the present invention, there is provided a dental work model manufacturing method comprising: inserting a pin into a pin insertion hole that is inserted so that the pin can be inserted and removed; and placing the divided plate at a fixed position on the support base. Process, fixing the impression model to the split plate with the adhesive, the second process, along the saw standby groove of the support base, facing both sides of the abutment tooth of the impression model, Rounding up from the saw standby groove to the split transition near the tooth neck of the impression model, and rounding up from the upper part of both sides of the abutment tooth of the impression model to the split transition in the third step and rounding up in the third step It is a manufacturing method of the dental work model which has a 4th process connected with the cut part made.
In the method for manufacturing a dental work model according to claim 11 of the present invention, the divided plate is provided with a plurality of saw guide grooves on the surface joined to the support base, and / or the support base is The dental according to claim 9 or 10, wherein a plurality of saw standby grooves are provided on a surface joined to the divided plate, and the divided plate and the support base are closely fitted to each other. It is a manufacturing method of a work model.

The present invention provides a base plate for an impression model by using a divided plate provided with pins parallel to the lower part and a support base having a hole for fitting the pins as a base for a dental technician work model. Omitting the work process of drilling holes and planting pins one by one in parallel with adhesive etc., eliminating the work process of the support base that was made by pouring gypsum into the mold etc. It is possible to prepare an impression model for dental work in a very short time without requiring skill because it is possible to start abutment tooth cutting work simply by pasting an impression model. .
Further, a groove is provided between the pins of the split plate, and a groove corresponding to the groove is also provided on the support base to be fitted, so that the split is made to stand by the saw in the groove of the support base. The process of fitting the plates and rounding them up toward the impression model above was made possible. By the above process, it is possible to secure a certain area of the basal plane in the cutting of the abutment tooth in the case of an irregular dentition that was very difficult, so that the abutment tooth can be easily inserted and removed from the support base and is accurate. It was possible to return to a high fixed position.
Since the support base is provided with a groove on the upper part, when it is used for a normal dentition, even when it is cut from the upper part to the joint surface in one step, it is difficult to be damaged by a saw. For this reason, the support base itself can be repeatedly used as a base for a dental work model only by exchanging only the dividing plate, and all can be recycled after use, and no waste gypsum is generated. .
In the present invention, the divided plate is made of resin and mixed with gypsum / talc or an inorganic material having a hardness of about 1 so that the resin is of the same degree as the gypsum hardness 1 while compensating for the brittleness of the conventional gypsum. Therefore, in the laminated structure in which the impression model of gypsum is pasted on the upper part of the dividing plate, when the abutment tooth is cut by a saw (for example, the plaster part of the dividing plate and the abutment tooth) Can be cut as one piece.
The dental work model fitting device according to the present invention can be easily and easily manufactured in large quantities at low cost.
Conventionally, in addition to labor, time, and cost, molding required skill, but it can be easily and easily produced in large quantities at a low cost. Furthermore, since gypsum is not used except when the articulator is mounted, it is possible to minimize damage and damage as a tough structure while neatly forming an impression model for dental work.
The dental model fitting device of the present invention can secure a reliable area of the basal plane, which was very difficult in the division of the abutment tooth in the case of an irregular dentition, and prevents errors due to dimensional changes in the model. This made it possible to produce a highly accurate prosthesis.
In the present invention, a split plate provided with a plurality of grooves and a pin provided between the grooves and a support base provided with a pin insertion hole that fits into the pin are prepared, and the pin insertion The pin is fitted into the hole, and the base is formed by joining the split plate and the support base. The first step, and the impression model is pasted on the split plate with an adhesive. And a third step of cutting both sides of the abutment tooth of the impression model affixed to the upper portion by a surface passing through the groove, the bottom surface of the abutment tooth can be obtained even in the case of an incorrect dentition. A sufficient area can be secured, and a highly accurate impression model for dental work can be produced.
The dental model fitting device according to the present invention is provided with a support base having a plurality of grooves and a split plate having pins provided between the grooves and a pin insertion hole that fits into the pins. A first step of fitting the pin into the pin insertion hole and joining the divided plate and the support base to form a base, and affixing an impression model on the divided plate with an adhesive And a second step, a third step of cutting up both sides of the abutment tooth of the impression model affixed to the upper part from the groove, and a fourth step of cutting down from the upper part of both sides of the abutment tooth. For example, a support base that was made by drilling a hole in the base of the impression model and planting the pins one by one with an adhesive, etc., and pouring gypsum into the formwork etc. The work process is also omitted and the impression model is pasted on the dividing plate Only in, from the fact that it is possible to get down to the cutting operation of the abutment tooth, without requiring a skilled, very simple, made it possible to prepare the impression model of dental work in a short period of time. Moreover, the area of the base face of the abutment tooth of the irregular dentition which was very difficult can be ensured.
The dental model fitting device according to the present invention is provided with an inclination on the side surface of the support base, and the upper surface of the support base has a fitting surface that is slightly smaller than the bottom surface of the split plate, so that the support base and the split By making a step in the fitting transition part with the plate, it is possible to facilitate the repeated operation while inserting and removing the abutment tooth.
In the dental model fitting device of the present invention, the support base can be used repeatedly because the groove for saw standby on the upper surface of the support base does not damage the cut-off of the divided plate completely.

  The above-described object, other objects, features, and advantages of the present invention will become more apparent from the following description of embodiments for carrying out the invention with reference to the drawings.

It is a disassembled perspective view which shows an example of the base for dental work which concerns on this invention. It is a perspective view solution figure which shows the support base which concerns on this invention. It is a top view solution figure which shows the manufacturing method of the dental model which concerns on this invention. It is a front view which shows the manufacturing method of the dental model which concerns on this invention. It is a top view solution figure which shows the manufacturing method of the dental model which concerns on this invention. It is a front view which shows the manufacturing method of the dental model which concerns on this invention. It is a top view which shows the abutment tooth cut-separated by the method of this invention. It is a bottom view which shows the abutment tooth cut-separated by the method of this invention. It is a front view which shows the abutment tooth cut-separated by the method of this invention. It is a rear view which shows the abutment tooth cut-separated by the method of this invention. It is a right view which shows the abutment tooth cut-separated by the method of this invention. It is a left view which shows the abutment tooth cut-separated by the method of this invention. It is a perspective view which shows the example of a support base. It is a perspective view which shows the example of a support base. It is a perspective view which shows the example of a support base. It is a top view which shows an example of the division | segmentation plate in the embodiment of this invention. It is a perspective view which shows 1 process of a dental work. It is a perspective view which shows 1 process of a dental work. It is a disassembled perspective view solution figure which shows an example of the fitting apparatus of the dental model of this invention. It is the upper side figure and saw preparation state of the support base of the fitting apparatus of the dental model of this invention. It is a disassembled perspective view solution figure of the support base of the fitting apparatus of the dental model of this invention, and a fitting base. It is the lamination implementation process shown in FIG.1, FIG.2, FIG.3 of the fitting apparatus of the dental model of this invention. It is a completion figure of lamination | stacking implementation of the fitting apparatus of the dental model of this invention. It is an example of mounting implementation to the articulator of the fitting apparatus of the dental model of this invention. It is a top view of the division | segmentation Example from the support base of this invention. It is a front view of the division | segmentation Example from the support base of this invention. It is a front view of the Example of the completion of the abutment tooth division of the present invention.・ It is a top view of the division | segmentation Example from the upper surface of the abutment tooth of this invention. It is a top view which shows the cut | disconnected anchor tooth. It is a bottom view which shows the cut abutment tooth. It is a front view which shows the cut | disconnected anchor tooth. It is a rear view which shows the cut | disconnected anchor tooth. It is a left view which shows the cut abutment tooth. It is a right view which shows the cut | disconnected anchor tooth. It is an illustration figure which shows the manufacturing method of the dental model which concerns on this invention, (A) is a bottom view solution figure, (B) is a top view solution figure. It is the arrow direction solution figure of FIG. 21 illustration X direction which shows the manufacturing method of the dental model which concerns on this invention, (A) shows the process of the first half, (B) is the solution figure which shows the process of the second half. It is an illustration figure of a division | segmentation plate, (A) is a top view solution figure, (B) is a side view solution figure. It is an illustration of a support base, (A) is a bottom view solution figure, (B) is a cross-sectional view solution figure. It is a perspective view solution figure which shows the modification of a division | segmentation plate and a support base. It is a perspective view solution figure which shows the modification of a division | segmentation plate and a support base. FIG. 26A is an illustrative plan view in a state where the divided plate and the support base to which the impression model of the modified example shown in FIG. 26A is fixed are combined. It is a perspective view solution figure which shows the modification of a division | segmentation plate. It is a perspective view solution figure which shows the modification of a division | segmentation plate. It is a perspective view solution figure which shows the modification of a division | segmentation plate. It is a perspective view solution figure which shows the modification of a division | segmentation plate and a support base. It is a perspective view solution figure which shows the modification of a division | segmentation plate. It is a perspective view solution figure which shows the modification of a division | segmentation plate. It is a front view which shows the conventional base. It is a top view which shows the conventional manufacturing method. It is a top view which shows the abutment tooth cut | disconnected by the conventional method. It is a bottom view which shows the abutment tooth cut | disconnected by the conventional method. It is a front view which shows the abutment tooth cut | disconnected by the conventional method. It is a rear view which shows the abutment tooth cut | disconnected by the conventional method. It is a left view which shows the abutment tooth cut | disconnected by the conventional method. It is a right view which shows the abutment tooth cut | disconnected by the conventional method.

  Hereinafter, specific examples of the present invention will be described in detail. The dental work model base according to the first embodiment of the present invention includes a split plate 2 and a support base 3. The divided plate 2 and the support base 3 have a length and a width along the teeth, which are arranged in an arc shape so that two or more teeth are positioned in substantially the same row in the same direction. The working model according to the embodiment of the present invention corresponds to the dentition from the canine to the back.

  The split plate 2 has a plurality of pins 14 planted on the bottom surface in parallel with each other at a constant interval toward the bottom, and a saw guide groove between adjacent pins 14 on the bottom surface. 5 is provided. The saw guide groove 5 is formed in a straight line continuously from one end to the other end in the direction intersecting with the tooth row of the impression model 1 formed in the upper portion, that is, in the width direction of the divided plate 2. Yes. The saw guide grooves 5 are formed intermittently such that the interval between the plurality of saw guide grooves 5 arranged in parallel is, for example, approximately corresponding to the interval between the back teeth of an adult. Has a depth that can guide the blade in the direction in which the saw guide groove 5 extends. Two anti-rotation grooves 10 are formed in parallel on the bottom surface of the dividing plate 2 so as to be orthogonal to the saw guide grooves 5.

On the other hand, the support base 3 is provided with a pin insertion hole 6 for mating with the pin 14 and is on standby at a position facing the saw guide groove 5 between the adjacent pin insertion holes 6. A working groove 4 is provided.
When the split plate 2 and the support base 3 are fitted together, the saw standby groove 4 faces the saw guide groove 5 to form a gap having a circular cross section.
Further, the support base 3 is formed with two ridges 13 that fit into the rotation prevention grooves 10 of the divided plate 2.
The pins 14 are arranged so that the pins 14 exist in each of the abutment teeth C divided when the dividing plate 2 is divided by the saw guide groove 5 and substantially orthogonal to the upper surface of the dividing plate 2. It is formed so as to project vertically below the abutment tooth C.

The pins 14 and the rotation prevention grooves 10 of the divided plate 2 are fitted into the pin insertion holes 6 and the ridges 13 of the support base 3, respectively. In this way, the divided plate 2 and the support base 3 are integrated.
At this time, the positions of the saw guide groove 5 and the saw standby groove 4 are such that the saw guide groove 5 of the dividing plate 2 and the saw standby groove 4 of the support base 3 are just aligned and opposed to each other. Is stipulated.
At this time, since the strength of fitting between the divided plate 2 and the support base 3 requires an appropriate strength for performing dental work, the divided plate 2 and the support base 3 are made of different materials. It is a product molded with synthetic resin, and it is easy to adjust the fitting strength to an appropriate value by selecting different synthetic resins such that one is hard and one is flexible. As a result, it is possible to produce a stable and highly accurate dental prosthesis 7.

  As the material of the dividing plate 2, it is desirable to use a synthetic resin capable of obtaining sufficient strength as a whole even if relatively thin pins 14 are integrally formed and the saw guide groove 5 is provided. Since the split plate 2 is used by attaching the impression model 1 to the upper part thereof as shown in the figure, 30 weight of an inorganic material having a hardness of about 1 if possible, such as gypsum, talc, oyster shell powder, etc. It is preferable to mix about%. The dividing plate 2 can also be made by injection-molding a low-foamed resin, and a plaster impression model 1 is attached to the dividing plate 2 with an adhesive or the like. Is configured so that it can be cut as a single piece without a sense of incongruity.

The dividing plate 2 is positioned between the pins 14 provided on the lower surface of the dividing plate 2 which is a boundary surface with the support base 3 so as to be orthogonal to the long end edge and parallel to the short end edge ( A saw guide groove 5 having a width and a depth of about several millimeters is provided between both long end edges before the tooth surface side and after the tooth inside.
On the other hand, the support base 3 corresponds to the saw guide groove 5 and is orthogonal to the long end edge and short end edge between each of the pin insertion holes 6 on the upper surface (of the support base 3). A saw-waiting groove 4 having a width and a depth of about several millimeters is provided to extend between both long front and rear edges (front of the tooth and front of the tooth). It has been.
The pins 14 extend downward in the lower surface of the divided plate 2 at appropriate intervals from the long edge and the short edge, and the saw guide groove 5 is between the pins 14 and the lower surface of the divided plate 2. In FIG. 1, the lengths extend continuously in the front-rear direction at appropriate intervals.
Further, the pin insertion hole 6 extends downward in the upper surface side of the support base 3 with an appropriate distance from the long end edge and the short end edge, and the saw standby groove 4 is formed in the pin insertion hole. 6, the upper surface of the support base 3 extends continuously in the front-rear direction (front side of the tooth surface and rear side of the tooth) at an appropriate interval.
By preparing a gypsum dedicated saw 9 along the saw standby groove 4, laminating the divided plates 2, and cutting up to the saw guide groove 5 of the divided plate 2 (along line A), the abutment tooth C comprising a basal plane C ₁ and dividing method can be reliably ensured.

The saw guide groove 5 provided in the lower part of the dividing plate 2 is for guiding the teeth of the gypsum dedicated saw 9 in an optimum direction when the dividing plate 2 is cut along the saw guide groove 5. A shallow notch of about 0.5 to 1 mm provided so as to extend in the front-rear direction of the divided plate 2.
The saw standby groove 4 provided on the upper portion of the support base 3 so as to correspond to the saw guide groove 5 causes the teeth of the gypsum dedicated saw 9 to wait upward, and the gypsum dedicated saw 9 is inserted into the saw guide groove 5. It is preferable that the width is about 1 mm and the depth is about 1.5 to 2 mm based on the thickness of the saw blade.
As the gypsum dedicated saw 9, a thread saw having a long and slender tooth portion is used.

In this embodiment, the base is composed of two members as the split plate 2 and the support base 3, and the split plate 2 and the support base 3 are each formed of a synthetic resin. The dividing plate 2 is configured so that an impression model 1 produced by pouring gypsum into a denture mold taken from the oral cavity is attached to the upper surface with an adhesive or the like, and is fitted to the support base 3.
In order to make the adhesion with the bottom surface of the impression model 1 stronger, it is preferable that the upper surface of the dividing plate 2 is formed with a large number of fine irregularities such as linear scratches.

When the preparation of the dental work model base is completed, the cutting process for dividing the abutment tooth C is started.
For preparation of cutting of the abutment tooth C, as shown in FIG. 2, the fitted divided plate 2 is extracted from the support base 3, and the saw standby groove 4 provided on the upper surface of the support base 3 is used exclusively for gypsum. Set the saw 9 with its teeth facing up. In this state, the split plate 2 having the saw guide groove 5 provided to guide the gypsum dedicated saw 9 is fitted to the support base 3, and the joint surface between the split plate 2 and the support base 3 is fitted. The preparation for cutting the abutment tooth C is completed in a state where the gypsum dedicated saw 9 is sandwiched between the formed saw standby groove 4 and saw guide groove 5.

The cutting process of the abutment tooth C is assumed to be cut along the line A shown in FIG. The split plate 2 with the impression model 1 affixed to the upper surface of the saw stand groove 4 provided on the upper surface of the support base 3 with the saw blade 9 facing upward as described above From the saw guide groove 5 provided for guiding the gypsum dedicated saw 9, it is rounded up along the line A vertically upward toward the base surface C ₁ of the impression model 1.

FIG. 4 shows the first half of the cutting process of the abutment tooth C.
In the first half of the cutting process of the abutment tooth C, as described above, in order to cut the two saw standby grooves 4 located between or adjacent to the adjacent teeth on both sides of the abutment tooth C to be divided, as described above. Impression of a case having an incorrect dentition from the saw guide groove 5 of the divided plate 2 by the gypsum dedicated saw 9 set in one of the two saw standby grooves 4 of the support base 3 perpendicular to the basal plane C ₁ of the left and right sides of the abutment tooth C of the model 1, rounded up and saw standby groove 4 of the left and right both sides of the abutment C and the saw stand groove 4 parallel to one another, stop in the middle By the way, finish.
At this time, the upper end 8 of the cut surface of the abutment tooth C is set at substantially the same height.
The upper end 8 is as high as possible in order to secure the area of the base surface C ₁ of the abutment tooth C and the strength sufficient to withstand the use for fine adjustment during dental technician operation and intraoral setting. It is preferable to do so.

  FIG. 5 shows a cutting process in the latter half of cutting down from the upper left and right of the abutment tooth C of the irregular dentition. In the second half of cutting down the upper part of the abutment tooth C of the irregular tooth row from between the left and right adjacent teeth, the left and right sides of the abutment tooth C are cut down along the line B. The lower end of the cut-down cut surface is made to coincide with the upper end 8 of the cut-up surface cut up in the first half step so that both cut surfaces are connected.

  In this case, the cutting when the left and right widths of the abutment tooth C are extremely wide, as shown in FIG. 6, becomes wider gradually as it goes down, particularly using the stress and elasticity of the gypsum dedicated saw 9. In such a manner, the upper end 8 of the cut surface cut from below is made to coincide.

As described in detail above, the cutting step of dividing and cutting the abutment tooth C includes the first half step of cutting from the dividing plate 2 side to the middle of the gypsum part constituting the gum portion of the impression model 1, and the impression model 1. It is divided into two stages including the latter half of the process of cutting from the upper part of the gypsum part up to the middle of the gypsum part constituting the gum part between the teeth of the same level.
In the first half of the process, the saw plate groove 9 provided on the upper part of the support base 3 is set so that the gypsum dedicated saw 9 faces upward as shown in FIG. In the combined state, as shown in FIG. 4, it is a step of cutting upward from the saw guide groove 5 vertically to the joint surface. And the latter half of the process is a process of cutting down along the line B from both upper sides of the abutment tooth C as shown in FIG. As shown in FIG. 6, if the abutment tooth C is cut by the two steps as shown in FIG. 6, the area of the base surface C ₁ can be surely secured as shown in FIGS. 7A to 7F. This is because the abutment tooth C capable of high-precision dental work can be manufactured.

  Hereinafter, the abutment tooth C separated by cutting will be described in detail with reference to FIGS. 7A to 7F. As shown in the top view (shown in FIG. 7A), the abutment tooth C after cutting according to the present invention is abutment tooth C from both sides of the upper surface of the impression model 1 (the adjacent teeth side on both sides of the abutment tooth C). Even if the shape after cutting is very small, regardless of the shape of the upper part of the abutment tooth C by the cutting method according to the present invention in the first half of the process of cutting up from the saw guide groove 5 at the lower part of the dividing plate 2, The bottom area can be reliably secured by the width of the dividing plate 2 (between adjacent saw guide grooves 5 and saw guide grooves 5).

As shown in FIG. 7B illustrating the width and shape of the front and rear left and right of the base surface C ₁ of the abutment tooth C, basal plane C ₁ of the abutment tooth C was cut by the cutting method according to the present invention, the cutting method Thus, the shape of the base surface C ₁ of the abutment tooth C that is cut up from the saw guide groove 5 on the bottom surface of the split plate 2 can be ensured as shown in the figure, so that the area of the base surface C ₁ can be ensured.
As shown in FIG. 7C (front view), FIG. 7D (rear view), FIG. 7E (left side view), and FIG. 7F (right side view), the position of the upper end 8 of the cut surface is on the front side compared to the rear side. The boundary line of the cut surface which becomes lower and connects the front side and the rear side becomes an oblique line.

  In the above-described embodiment, several pins 14 parallel to the lower part are provided and integrated as the dividing plate 2, so that the bottom surface hole of the impression model 1 is opened as in the prior art, and the pins 14 are parallel to each other. This eliminates the need for planting the base plate in the bottom hole, completes the dental work model only with a simple process, and reduces the time and process for producing a complex dental work model.

  As shown in FIGS. 8A to 8C, the shape of the support base 3 can be variously devised so that it can be easily gripped at the time of preparation of the prosthesis 7 (of a dental technician), less fatigued, and operability is improved. it can. For example, the support base 3 illustrated in FIG. 8A has a bowl-shaped recess L formed around the support base 3. The support base 3 in the description example of FIG. 8B is provided with a circular indentation M that matches the fingertip. The support base 3 in the example shown in FIG. 8C is formed with a large number of linear grooves N in order to prevent slipping.

  FIG. 9A shows another embodiment of the dividing plate 2, and this dividing plate 2 has a chamfered portion F formed at the front and back edges thereof. In the chamfered portion F, the front end and the rear end of the upper part of the divided plate 2 are obstructed during the trimming operation of the abutment tooth C by a handpiece or the like. And it is preferable to provide in the edge part of the both sides of a rear end. The chamfered portion F is not limited to the described shape, but a chamfered width and height range of about 1 to 2 mm is preferable.

FIG. 9B is a diagram for explaining the significance of the chamfered portion F. FIG.
As shown in FIG. 9B, when the abutment tooth C is trimmed by the handpiece E or the like, the front and rear edge portions of the upper part of the divided plate 2 are obstructed. By forming the chamfered portion F at the edge portion at the rear end, the trimming operation can be performed without any obstacle.

FIG. 9C is a diagram showing a part of a process for producing a dental prosthesis 7 using the base of the present invention.
After completing the dental technician model by cutting the abutment tooth C of the impression model 1 affixed to the dividing plate 2 of the dental work base in the first half and the second half, the procedure is as follows. A model of the prosthesis 7 is made by engraving the wax on the dentition C with wax or the like and engraving it. Next, this is buried in a casting ring for metal casting, cast, polished, and finished to complete the restored prosthesis 7 and then set on the abutment tooth C to produce the prosthesis 7 Ends.

The present invention cuts the abutment tooth C of the case of a normal dentition with few irregularities of each tooth shown in FIG. 33 along the curve (line D) drawn by the dentition in one step from the upper part of the impression model 1. It can adapt well to doing.
Further, since the divided plate 2 and the support base 3 are made of synthetic resin, the fitting accuracy of both the divided plate 2 and the support base 3 is good. Further, since the support base 3 can be used without damaging the support base 3 by providing the saw standby groove 4, the support base 3 itself can be replaced by simply replacing the dividing plate 2 for each operation. It can be used many times.

  The base according to the present invention uses a synthetic resin for the dividing plate 2 and the supporting base 3 to finely express the impression model 1 (dihydrate gypsum) made of gypsum pasted on the upper part of the dividing plate 2. It can be pulverized (finely) and mixed into the synthetic resin. And the base concerning this invention implement | achieved making all recyclable without taking out gypsum disposal waste.

[Example 1]
The dividing plate 2 is mainly made of a synthetic resin. In this embodiment, about 30 to 40% by weight of gypsum is mixed in polystyrene resin, and azodicarbonamide (ADCA) cell microphone (CE) is added in an amount of 0.7% by weight as an organic foaming agent. The resulting mixture is melt-kneaded (200 to 210 ° C.) in an injection molding machine, and then manufactured by low foaming injection molding. Gypsum (calcium sulfate 1/2 hydrate, also called calcined gypsum = calcined gypsum) mixed during the molding of the divided plate 2 is pasted on the divided plate 2 with the impression model 1 made of gypsum. In the dental work process to be performed, the divided plate 2 and the impression model 1 are integrated so as to be easily cut by the gypsum dedicated saw 9 without a sense of incongruity.
The support base 3 is manufactured by injection molding after melt-kneading polystyrene resin in an injection molding machine. The support base 3 is different from the split plate 2 because it requires an appropriate fitting adjustment in the dental technical work process in which the split plate 2 and the support base 3 are fitted and used. It is desirable to use the material, and it was formed of a synthetic resin that does not contain contaminants such as gypsum.
As a material of the support base 3, by using a resin of a material different from that of the divided plate, an appropriate fitting adjustment between the support base and the divided plate (by the pin portion and the rotation prevention groove portion) is performed. This makes it possible to produce a highly accurate prosthesis 7 because the stability of the accuracy in the dental technician work process while inserting and removing the divided plate many times is very good.

  In the above embodiment, the dividing plate 2 is used by mixing gypsum into synthetic resin. However, the dividing plate 2 is mixed with an inorganic material having a hardness of about 1 such as talc and shell powder instead of gypsum. Is possible.

  Moreover, in the said Example, since it attaches importance to adjustment of fitting with the division | segmentation plate 2 and the support base 3, although the support base 3 was used without foaming the polystyrene resin without a contamination, it was not necessarily. The support base 3 is not necessarily foamed, and it is also possible to make the support base 3 low foamed. In this case, as the foaming agent, it is possible to use the foaming agent by appropriately selecting from known physical foaming agents or chemical foaming agents as the foaming agent for the polystyrene resin. However, when the foaming rate is increased, the precision decreases, so it is preferable to keep the foaming low.

[Example 2]
Instead of the gypsum of the dividing plate 2 of the first embodiment, the dividing plate 2 is formed by using about 30 to 40% by weight of wood powder (sawdust) mixed therein.
The split plate 2 to which the plaster impression model 1 is attached is suitable for mixing a synthetic resin with an inorganic material for the purpose of cutting with a gypsum saw 9 without a sense of incongruity. If there is no concern about dirt generated during the operation process, it is possible to mix up to 30 to 50% by weight of organic materials such as wood powder (sawdust) and substitute for inorganic materials. In this case, the feeling at the time of cutting as when the inorganic material is mixed is not required.
Moreover, when organic materials such as wood powder (sawdust) and inorganic materials are combined and mixed in synthetic resin, the feeling when the divided plate 2 is cut by the gypsum saw 9 can be smoothly cut. It becomes a sense.

  Next, another embodiment of the present invention will be described with reference to FIGS. However, the embodiment described below exemplifies a dental model fitting device 100 for embodying the technical idea of the present invention, and the present invention describes the dental model fitting device 100 as follows. Not specific.

  The dental model fitting device 100 shown in FIG. 10 is a resin split plate having a support base 103 and a plurality of pins 114 that are connected to a fixed position of the support base 103 so as to be attached to and detached from each other. 102 and an impression model 101 fixed to the divided plate 102.

The plurality of pins 114 are extended vertically downward and parallel to the bottom surface of the dividing plate 102, and have an elliptical columnar shape, that is, the bottom surface is an ellipse and the angle between the bottom surface and the side surface is not 90 degrees, but reaches the tip. This is a tapered prismatic body that gradually becomes thinner. The pins 114 are injection-molded in a lump with a molding die and formed integrally with the divided plate 102.
The split plate 102 is formed to have a laminated structure in which the support base 103 is connected to a fixed position by pins 114, is formed to be slightly larger than the support base 103, and outward from the upper surface of the support base 103. It is configured to protrude.
The pin 114 is formed at a position corresponding to the tooth portion of the impression model 101.

The support base 103 of the dental model fitting device 100 has a truncated quadrangular pyramid shape as a whole, has a hollow portion therein, and has a substantially flat upper surface so that the pin 114 can be inserted and removed from above the upper surface. It is the shape provided with the hole 106 for pin insertion inserted in.
The support base 103 includes an upper wall 130 and a side wall 131, and the front base 132 surrounds the pin insertion hole 106 around the pin insertion hole 106 between the front wall 132 and the rear wall 133 constituting the side wall 131. A plurality of partition walls 134 formed across the wall 132 and the rear wall 133 are provided. The plurality of partition walls 134 constitute an insertion portion for the pins 114 and are formed intermittently at appropriate intervals corresponding to the arrangement of the pin insertion holes 106.
The recessed portion 135 between the plurality of partition walls 134 has a rectangular cross section and is opened toward the upper wall 130 from the opening on the bottom surface of the support base 103. The recessed portion 135 has a fitting base 140 described later. The fitting projection 142 is fitted.
The pin insertion hole 106 is provided with an opening having an elliptical shape in plan view corresponding to the cross-sectional shape of the pin 114 in the upper wall 130, and is opened downward from the opening of the upper wall 130. The taper is narrower.
In the support base 103, an upper wall 130, a side wall 131, and an inner partition wall 134 are injection-molded by a molding die using a synthetic resin.

The split plate 102 is positioned between the pins 114 provided on the lower surface of the split plate 102, which is a boundary surface with the support base 103, so that it is perpendicular to the long end edge and parallel to the short end edge. A saw guide groove 105 having a width and a depth of about several millimeters is provided between both long end edges (before the front side of the tooth and after the inside of the tooth).
On the other hand, the support base 103 is perpendicular to the long end edge and short end edge between each of the pin insertion holes 106 on the upper surface (of the support base 103) corresponding to the saw guide groove 105. A saw-waiting groove 104 having a width and depth of about several millimeters is provided extending between both front and rear long edges (front side of the tooth and front side of the tooth). It has been.
The pin 114 extends in the front-rear direction (front side of the tooth side and rear side of the tooth side) so as to be orthogonal (or obliquely) to the long end edge on the lower surface of the split plate 102, and the saw guide groove 105. Are extended continuously in the front-rear direction at an appropriate distance from the long edge on the lower surface of the split plate 102 between the pins 114.
Further, the pin insertion hole 106 extends in the front-rear direction (front side of the tooth surface and rear side of the tooth) so as to be orthogonal (or obliquely) to the long edge on the upper surface of the support base 103. The saw standby groove 104 is located between the pin insertion holes 106 at an appropriate distance from the long end edge on the upper surface of the support base 103 (front side of the tooth surface and rear side of the tooth). Extends continuously in the direction.
The gypsum dedicated saw 9 is prepared along the saw standby groove 104, the divided plates 102 are stacked, and the divided plate 102 is cut up to the saw guide groove 105 (along line A), whereby the abutment tooth C comprising a base surface C ₁ of the division method can be reliably ensured.

  The support base 103 has an inclined side surface, and the upper surface of the support base 103 has a joint surface that is slightly smaller than the bottom surface of the divided plate 102. The step is added to the split plate 102 and the support base 103 because the pin 114 is inserted into the pin insertion hole 106 so that the pin 114 can be inserted and removed, and the support base 103 and the split plate 102 are laminated. The operability is taken into consideration so that the structure work can be performed while repeating the repetitive operation of pulling the separation plate 160 straight up and inserting it straight down while being in a fitted state. .

The support base 103 and the dividing plate 102 are formed of a synthetic resin mixed with an inorganic material. In this embodiment, the compatibility between a resin containing about 35% by weight of gypsum and a styrene resin containing about 35% by weight of calcium carbonate among inorganic materials is very good in terms of strength.
In particular, the divided plate 102 is preferably made of other resin containing gypsum or containing an inorganic material similar to gypsum so that the fixed impression model 101 and the divided plate 102 can be divided without a sense of incongruity.
Moreover, if it suppresses to low foaming, an inorganic material can be mixed and a foamed resin can also be used. By mixing the inorganic material, although the divided plate 102 is a synthetic resin, it has an effect of preventing static electricity due to friction generated when the divided plate 102 and the impression model 101 are divided in technical operation.
However, considering the adjustment of the degree of fitting of the undercut surface of the convex part 136 and the inclination of the concave part, the combination is not limited to this.

The fitting base 140 is fixed to the lower part of the side wall 131 of the support base 103.
The fitting base 140 has a rectangular plate shape in plan view and has a top surface that is slightly larger than the bottom surface of the support base 103. The fitting base 140 is fixed to the bottom surface of the support base 103 in order to be fixed to the bottom surface of the support base 103. Column-shaped fitting convex portions 142 are provided to be fitted into several concave portions 135 between the partition walls 134 constituting the insertion portion of the 103 pin 114.
The fitting protrusion 142 has a comb-teeth shape in which prismatic protrusions extending in the front-rear direction are arranged in parallel at an appropriate interval.
The fitting base 140 is provided with two clog-like holding convex portions 144a and holding convex portions 144b provided at both ends of the bottom surface and extending to both ends of the front and rear short ends. A columnar bonding convex portion 146 is provided. The fitting base 140 is a flexible material separation that is fitted between the holding convex portion 144a and the holding convex portion 144b separated to the left and right and fitted into the adhesive convex portion 146. The plate 160 is configured to have a laminated structure.

The fitting base 140 is formed with several columnar fitting convex portions 142 that project into a plurality of partition walls 134 between the insertion portions of the pins 114 of the support base 103 with a precisely fixed length. ing.
The fitting base 140 is formed by projecting upwardly on the four corners of the upper surface, fitting pinching portions 148 for fitting the four corners of the supporting base 103 and fixing the supporting base 103 tightly. ing. The fitting sandwiching portion 148 has elasticity.
The fitting base 140 has a top surface that is slightly larger than the bottom surface of the support base 103, so that when the mounting and dismounting operations to and from the articulator 190 are performed, the fitting base 140 is simply inserted and pulled out by simple repeated operations. It is configured to be able to.

The separation plate 160 has a shape in plan view, and has the same thickness as the heights of the two holding convex portions 144a and the holding convex portions 144b of the fitting base 140, and a fitting hole 162 is formed at the center thereof. It has been drilled.
Separation plate 160 is formed of a relatively soft rubber or the like.
The separation plate 160 can be made flexible by being made of a flexible material such as resin or rubber.

  The separating plate 160 made of a flexible material can reduce the amount of plaster used when the dental plate articulator 190 is attached to the minimum amount. In addition, in the operation of removing the dental model from the articulator 190 after the prosthesis 7 is manufactured by providing the separation plate 160 with flexibility, the mounting portion with the plaster is a columnar shape provided at the center of the bottom surface of the fitting base 140. Separation of flexible material because it is attached to the articulator 190 via a flexible material separating plate 160 which is adhered to the adhesive projection 146 but is closely fitted. By removing the plate 160 by hand or the like, the mating base 140 can be quickly and simply removed from the articulator 190.

The fitting device 100 is used by being fixed to an articulator 190 for fixing an impression model 101 of a dentition in a dental technician.
As for the articulator 190, various articulators 190 have been conventionally used as a articulator 190 for fixing the impression model 101 of the dentition in a dental technician. There is an articulator 190 to be called.
As shown in FIG. 15, the articulator 190 bends the open side of the lower jaw support portion 191 formed by bending a metal wire into a wide U-shape vertically upward and a spring 192 at the middle portion. A support hole 194 is provided at the upper end of the support column 193a and the support column 193b. The upper end of the support hole 194 has a U-shape substantially the same as the support portion 191 for the lower jaw, and the open end portion 195 is slightly bent. The support portion 196 is rotatably attached, and is configured symmetrically as a whole.

The articulator 190 is generally used for producing a partial prosthesis 7 such as an inlay crown or a crown bridge. As the impression model 101 fixed to both the upper and lower support parts, the entire dentition is also used. It can also be used on only one side.
When mounting on a denture articulator for making a denture or the like, as shown in FIG. 23, a pin 114 is also applied to the tongue and palate of the impression model 101 of the upper and lower jaws. Can be used for cases with full dentition.

Next, a method for fixing the impression model 101 using the articulator 190 will be described.
First, the fitting base 140 and the separation plate 160 of the fitting device 100 are fixed so as to cover the lower jaw support portion 191, and the lower jaw support portion 191 is covered with gypsum and adhered to the fitting base 140 and the separation plate 160. The mating base 140 and the separation plate 160 are fixed to the lower jaw support 191 by hardening with plaster.
The same applies when the fitting device 100 is fixed to the upper jaw support 196.

Next, a method for dividing the abutment tooth C from the dentition model side will be described.
As a dividing method, the dividing plate 102 is disposed at a fixed position of the support base 103, the first step, the impression model 101 is fixed to the dividing plate 102 with an adhesive, the second step, and the second step, After the fitting device 100 is fixed to the articulator 190 at the fitting base 140 and the separation plate 160, the third step is performed by dividing the both sides of the abutment tooth C on the surface passing through the saw guide groove 105 of the dividing plate 102; Have
Further, a dedicated gypsum saw 9 is prepared in the saw standby groove 104 of the support base 103, facing both sides of the abutment tooth C of the impression model 101, from the saw guide groove 105 of the divided plate 102 to the vicinity of the tooth neck. The third step, which is cut up perpendicularly to the basal plane C ₁ , is connected to the cut portion cut up in the third step by cutting down from the upper part on both sides of the abutment tooth of the impression model 101 to the split transition part of the third step. And a fourth step.

The first step is a step of fitting the support base 103 and the divided plate 102 of the dental model fitting device together so as to be laminated.
The support base 103 is provided with a pin insertion hole 106, and can be connected to a fixed position in order to insert the pins 114 provided in a lump in the lower part of the dividing plate 102 into the pin insertion hole 106. .
In order to place the divided plate 102 in a fixed position on the upper surface of the support base 103 and in a fixed position during the technical work while inserting / removing the divided plate 102 many times, the support base 103 waits on the upper surface of the support base 103. Protrusions 136 are provided on both sides in the vicinity of the pin insertion hole 106 between the groove 104 and the convex part 136 has an undercut surface below it as an adjustment surface for precise fitting without lifting. Has been granted.
The split plate 102 has recesses 122 on both sides near the pins 114 between the saw guide grooves 105 on the bottom surface, and the recesses 122 correspond to the undercut surfaces of the protrusions 136 on the top surface of the support base 103. A taper (inclination) is applied to the vicinity of the bottom surface of the recess 122.
Further, the convex portion 136 provided on either the bottom surface of the resin-made divided plate 102 or the support base 103 is provided with an undercut, while the concave portion 122 is a taper (corresponding to the convex portion 136 ( (Inclination) is provided, and furthermore, by changing the hardness (strength) between the support base 103 and the divided plate 102, it is configured to fit precisely.
Therefore, in the first step, the divided plate 102 and the support base 103 can be fitted to each other according to the intended purpose to form a laminated structure.

The second step is a step of placing and fixing the impression model 101 which is a dental model including a tooth mold formed of gypsum on the upper surface of the dividing plate 102.
Impression model 101, the base plane C ₁ opposite to the tooth form is shaped substantially in the plane, it is tightly fixed to the planar upper surface of the dividing plate 102.

  The third step is the same as in the first embodiment.

Next, a base of a dental work model for dentures according to a third embodiment of the present invention will be described with reference to FIGS.
Since the denture and local denture are manufactured outside the oral cavity, it is necessary to reproduce the state in the oral cavity as an accurate model.
Therefore, an accurate impression is necessary, and an accurate plaster model is necessary.
If there is no sub-model, dentures will be tried in the patient's mouth, but the time of increasing chair time in the examination room is a problem.
If the remaining sub-model can check the compatibility of the clasp, bar and mucous membrane with the remaining teeth, and confirm all the dentures on the lingual side, palate, and bottom of the jaw, Convenient.
According to the base of this embodiment, when confirming the conformity state of the denture, it can be cut by dental sawing while confirming the remaining teeth, and the conformity state of the denture on the lingual side, palate and bottom of the jaw This is useful when checking.
At that time, if there are a pin, a support part and a maintenance part at the remaining tooth part, lingual part, palate part and chin bottom part, the gypsum submodel can be freely cut and divided, and the division plan can be freely set. It is possible to select.
The confirmation of the mounting direction of the denture in the oral cavity, the compatibility check and the occlusal state check can be performed without damaging the submodel by cutting and dividing the remaining tooth portion.

  A dental work model base 200 according to the third embodiment of the present invention includes a split plate 202 and a support base 203. The dividing plate 202 and the support base 203 correspond to the shape of the impression model 201, and are larger than the impression model 201 and are arranged in an arc shape so that two or more teeth are located in substantially the same direction in the same direction. And length and width along the teeth, gums and maxilla. The working model according to the embodiment of the present invention has a rice ball shape that is approximately square or arcuate around.

  The divided plate 202 has a plurality of pins 214 planted on the bottom surface in parallel to each other at a constant interval toward the lower portion, and a saw guide groove between adjacent pins 214 on the bottom surface. 205 is provided.

  The pins 214 are arranged at positions corresponding to the tooth portions of the impression model 201 and are irregularly arranged at appropriate intervals over the upper jaw portion. The pins 214 are arranged so that the pins 214 exist on each of the abutment teeth C divided when the dividing plate 202 is divided by the saw guide groove 205 and substantially perpendicular to the upper surface of the dividing plate 202. It is formed so as to project vertically below the abutment tooth C.

  The saw guide groove 205 is formed in a straight line continuously from one end to the other end in the direction intersecting with the row of teeth of the impression model 201 formed in the upper portion, that is, in the width direction of the divided plate 202. Yes. The saw guide grooves 205 are formed intermittently such that the interval between the plurality of saw guide grooves 205 arranged in parallel is, for example, approximately corresponding to the interval between the back teeth of an adult. The blade has a depth that can guide the blade in the direction in which the saw guide groove 205 extends.

The dividing plate 202 is located at the front and rear end edges (the front end edge on the front teeth side and the rear end edge on the back teeth side) between each of the pins 214 provided on the lower surface of the division plate 202 that is a boundary surface with the support base 203. A width and depth of about several millimeters extending between the front and rear edges and between the front and rear edges and the left and right edges so as to cross obliquely and to the left and right edges. One saw guiding groove 205a, a second saw guiding groove 205b, and a third saw guiding groove 205c are provided.
On the other hand, the support base 203 corresponds to the first saw guide groove 205a, the second saw guide groove 205b, and the third saw guide groove 205c on the upper surface thereof (of the support base 203). Between each of the pin insertion holes 206, the front and rear edges are obliquely crossed with the front and rear edges (the front edge on the front teeth side and the rear edge on the back teeth side) and with the left and right edges. A first saw standby groove 204a, a second saw standby groove 204b, and a third saw standby groove 204a having a width and a depth of about several millimeters extending between the front and rear edges and the left and right edges. A saw standby groove 204c is provided.
The first saw guide groove 205a has a diagonal line that rises to the right so as to be positioned between the right end edge and the rear end edge and between the left end edge and the front end edge substantially between the teeth. .
The second saw guide groove 205b is a diagonal line that rises to the left so as to be located between the left end edge and the rear end edge and between the right end edge and the front end edge substantially between each tooth portion. .
The third saw guide groove 205c is shaped so as to straddle between the front tooth portion and the palate portion between the front edge and the rear edge.
The first saw guide groove 204a has a slanting line that rises to the right so as to be located between the right end edge and the rear end edge and between the left end edge and the front end edge substantially between the tooth portions. .
The second saw guide groove 204b has a diagonal line that rises to the left so as to be positioned between the left end edge and the rear end edge and between the right end edge and the front end edge substantially between the tooth portions. .
The third saw guide groove 204c is shaped so as to straddle between the front tooth portion and the palate portion between the front edge and the rear edge.

The pins 214 are formed on the lower surface of the divided plate 202 at appropriate intervals in the tooth position and palate portion of the gum portion, and the first saw guide groove 205a, the second saw guide groove 205b, and the third The saw guide grooves 205c extend continuously in the front-rear and left-right directions so as to intersect each other at an appropriate interval between the lower surface of the split plate 202 and the pins 214.
Further, the pin insertion hole 206 is formed on the upper surface side of the support base 203 at an appropriate interval in the tooth position of the gum part and the palate portion, and the first saw standby groove 204a and the second saw are provided. The standby groove 204b and the third saw standby groove 204c intersect each other at an appropriate interval corresponding to the position of the pin 214 between the pin insertion holes 206 on the upper surface of the support base 203. As described above, it extends continuously in the front-rear and left-right directions.
The gypsum dedicated saw 9 is prepared along the first saw standby groove 204a, the second saw standby groove 204b, and the third saw standby groove 204c, and the divided plates 202 are stacked. The base surface C ₁ of the abutment tooth C can be reliably secured by cutting up along the first saw guide groove 205a, the second saw guide groove 205b, and the third saw guide groove 205c (along line A). This is a division method that can be secured.

  Two anti-rotation grooves 210 are formed in parallel on the bottom surface of the dividing plate 202 so as to intersect with the saw guide groove 205 in front and rear.

On the other hand, the support base 203 is provided with a pin insertion hole 206 for fitting the pin 214, and waits at a position facing the saw guide groove 205 between the adjacent pin insertion holes 206. A groove 204 is provided.
When the split plate 202 and the support base 203 are fitted together, the saw standby groove 204 faces the saw guide groove 205 to form a circular gap having a circular cross section.
Further, the support base 203 is formed with two ridges 213 that fit into the rotation prevention grooves 210 of the divided plate 202.

The pins 214 and the rotation prevention grooves 210 of the divided plate 202 are fitted into the pin insertion holes 206 and the ridges 213 of the support base 203, respectively. In this way, the divided plate 202 and the support base 203 are integrated.
At this time, the saw guide groove 205 and the saw standby groove 204 of the split plate 202 and the saw standby groove 204 of the support base 203 are just aligned so that the respective groove edges are opposite to each other. The position of is determined.
At this time, since the strength of fitting between the divided plate 202 and the support base 203 requires an appropriate strength for performing dental work, the divided plate 202 and the support base 203 are made of different materials. It is a product molded with a synthetic resin, and by selecting a synthetic resin of a different material, it becomes easy to adjust the strength of the fitting to an appropriate value, and as a result, the stable and highly accurate dental prosthesis 7 Making it possible.

In order to place the divided plate 202 at a fixed position on the upper surface of the support base 203 and at a fixed position during the technical work while inserting / removing the divided plate 202 many times, the support base 203 waits for sawing on the upper surface. A convex portion 236 is provided between the groove 204 and in the vicinity of the pin insertion hole 206, and the convex portion 236 is provided with an undercut surface below as an adjustment surface to be precisely fitted without lifting. Yes.
The split plate 202 includes a recess 222 near the pin 214 between the saw guide grooves 205 on the bottom surface, and the recess 222 is a taper (inclined) corresponding to the undercut surface of the upper surface protrusion 236 of the support base 203. ) Is provided near the bottom surface of the recess 222.
Further, the convex portion 236 provided on either the bottom surface of the resin-made dividing plate 202 or the support base 203 is provided with an undercut, while the concave portion 222 has a taper corresponding to the convex portion 236 ( (Inclination) is provided, and furthermore, by changing the hardness (strength) between the support base 203 and the divided plate 202, it is configured to fit precisely.
Therefore, in the first step, the divided plate 202 and the support base 203 can be fitted into a laminated structure as intended.

When the preparation of the base for the dental work model is completed, the cutting process for dividing the abutment tooth C is started.
For preparation of cutting of the abutment tooth C, as shown in FIG. 21 to FIG. Set the plaster saw 9 with its teeth facing upward. In this state, the split plate 202 having the saw guide groove 205 provided to guide the gypsum dedicated saw 9 is fitted to the support base 203, and the joint surface between the split plate 202 and the support base 203 is fitted. The preparation for cutting the abutment tooth C is completed in a state where the gypsum dedicated saw 9 is sandwiched between the formed saw standby groove 204 and saw guide groove 205.

The cutting process of the abutment tooth C is assumed to be cut along the line A shown in FIGS. The split plate 202 with the impression model 201 attached to the upper surface thereof with the saw-tooth dedicated saw 9 set in the saw standby groove 204 provided on the upper surface of the support base 203 as described above, From the saw guide groove 205 provided to guide the gypsum dedicated saw 9, it is rounded vertically upward along the line A toward the base surface C ₁ of the impression model 201.

In the first half of the cutting process of the abutment tooth C, as shown in FIG. 22 (A), two saw standby grooves 204 located between or adjacent to the adjacent teeth on both sides of the abutment tooth C to be divided. Is cut by the gypsum dedicated saw 9 set in one of the two saw standby grooves 204 of the support base 203 as described above, so that the saw guide groove 205 of the divided plate 202 is cut. Then, the left and right saw standby grooves 204 and the saw standby grooves 204 are rounded up parallel to each other perpendicularly to the left and right basal planes C ₁ of the remaining teeth C to which the impression model 201 is clasped. End where you want to stop.
At this time, the upper end 208 of the cut surface of the remaining tooth C is set at substantially the same height.
The upper end 208 should be as high as possible in order to secure the area of the base surface C ₁ of the remaining tooth C and the strength sufficient to withstand the use in dental technician operation and fine adjustment during intraoral setting. It is preferable to make it.

  In the latter half of the cutting step in which the upper part of the remaining tooth C of the irregular tooth row is cut from between the left and right adjacent teeth, the left and right sides of the remaining tooth C are cut down along the line B as shown in FIG. . The lower end of the cut-down cut surface is made to coincide with the upper end 208 of the cut-up surface cut up in the first half step so that both cut surfaces are connected.

  When the left and right widths of the remaining teeth C are extremely wide at this time, as shown in FIG. 22 (B), the width is gradually widened as it goes down while using the stress and elasticity of the gypsum dedicated saw 9 in particular. It cuts so that it may become, and it may be made to correspond with the upper end 208 of the cut surface rounded up from the bottom.

As described above in detail, the cutting step of dividing and cutting the abutment tooth C or the remaining tooth C is the first half step of cutting from the dividing plate 202 side to the middle of the plaster portion constituting the gum portion of the impression model 201. The impression model 201 is divided into two stages including the latter half of the process of cutting from the upper part of the gypsum part up to the middle of the gypsum part that constitutes the gum part between the teeth of the same teeth.
In the first half of the process, the split plate 202 is fitted by setting the gypsum dedicated saw 9 upward as shown in the figure and extending along the saw standby groove 204 in the saw standby groove 204 provided on the upper side of the support base 203. In the combined state, as shown in FIG. 22 (A), it is a step of cutting up from the saw guide groove 205 vertically to the joint surface. The latter half of the process is a process of cutting down along the line B from both upper sides of the abutment tooth C as shown in FIG.
Dividing into two stages as described above, if the abutment tooth C is cut by the above-described two steps, the area of the basal plane C ₁ can be surely secured, and the abutment tooth C capable of performing highly accurate dental work can be manufactured. Because.

The abutment tooth C in the state of a torsion tooth or an irregular dentition according to the present invention is a shape after cutting of the abutment tooth C from both sides of the upper surface of the impression model 201 (the adjacent tooth side on both sides of the abutment tooth C). Even when the width of the split plate 202 is very small, the cutting method according to the present invention in the first half of the process of cutting up from the saw guide groove 205 at the bottom of the split plate 202 is independent of the shape of the upper portion of the abutment tooth C. Therefore, the bottom area can be reliably secured by the amount (between the adjacent saw guide grooves 205 and the saw guide grooves 205).
At that time, if there are a pin, a support part and a maintenance part on the remaining tooth part, lingual part, palate part and chin bottom part, confirmation of the mounting direction of the denture in the oral cavity, compatibility check and occlusion state check In addition, it can be easily ensured so as to be in close contact with the attachment site in the human oral cavity such as the tooth part, gum part and palate part of the denture.

  The base of the dental work model for dentures according to the present invention is not limited to the above embodiment, and various modifications can be made. A modification will be described with reference to FIGS.

  A dental work model base 300 as a modification includes a split plate 302 and a support base 303. The dividing plate 302 and the support base 303 correspond to the shape of the impression model 301, and are larger than the impression model 301, and are arranged in an arc shape so that two or more teeth are oriented in the same direction in the same direction. And length and width along the teeth, gums and maxilla. The modified working model has a half-moon shape with a circular arc around the periphery.

  The split plate 302 has a plurality of pins 314 planted on the bottom surface in parallel with each other at a constant interval toward the lower portion, and a saw guide groove between adjacent pins 314 on the bottom surface. 305 is provided.

  The pins 314 are arranged at positions corresponding to the tooth portions of the impression model 301 and are irregularly arranged at appropriate intervals over the upper jaw portion. The pins 314 are arranged so that the pins 314 exist in each of the abutment teeth C divided when the dividing plate 302 is divided by the saw guide groove 305 and are substantially orthogonal to the upper surface of the dividing plate 302. It is formed so as to project vertically below the abutment tooth C.

  The saw guide groove 305 is formed in a straight line continuously from one end to the other end in the direction intersecting with the tooth row of the impression model 301 formed in the upper portion, that is, in the width direction of the divided plate 302. Yes. The saw guide grooves 305 are formed intermittently with intervals between the plurality of saw guide grooves 305 arranged in parallel, for example, at intervals approximately corresponding to the intervals between the back teeth of adults. The blade has a depth capable of guiding the blade in the direction in which the saw guide groove 305 extends.

On the other hand, the support base 303 is provided with a pin insertion hole 306 for fitting the pin 314 and is in a standby state at a position facing the saw guide groove 305 between adjacent pin insertion holes 306. A groove 304 is provided.
When the split plate 302 and the support base 303 are fitted together, the saw standby groove 304 faces the saw guide groove 305, and a gap having a circular cross section is formed.

The pins 314 of the divided plate 302 are fitted in the pin insertion holes 306 of the support base 303, respectively. In this way, the divided plate 302 and the support base 303 are integrated.
At this time, the saw guide groove 305 of the split plate 302 and the saw standby groove 304 of the support base 303 are just aligned with each other so that the groove edges of the saw guide groove 305 and the saw standby groove 304 face each other. The position is fixed.
At this time, since the strength of fitting between the divided plate 302 and the support base 303 requires an appropriate strength for performing dental work, the divided plate 302 and the support base 303 are made of different materials. It is a product molded with a synthetic resin, and by selecting a synthetic resin of a different material, it becomes easy to adjust the strength of the fitting to an appropriate value, and as a result, the stable and highly accurate dental prosthesis 7 Making it possible.
25 is an integral type, the divided plate 302 shown in FIG. 26 is divided into a horseshoe-shaped divided plate 302A in the gum part and a half-moon shaped divided plate 302B in the palate. Only the dividing plate 302A is configured to be easily cut by the plaster saw 9.
The divided plate 302 and the support base 303 shown in FIG. 25 have a flat surface with a smooth mating surface, but the support base 303 shown in FIG. 26 has a horseshoe shape with a slightly higher gum portion 303A and a slightly palatal portion 303B. It is a low half moon type, and a step is provided between the two, and when the saw standby groove 304 formed in the gum portion 303A is cut by the gypsum dedicated saw 9, the thickness of the palate portion 303B to be cut is reduced. The gum part 303A is easy to cut.
When the divided plate 302 and the support base 303 are combined, the upper surface of the horseshoe-shaped divided plate 302A of the divided plate 302 and the upper surface of the half-moon shaped divided plate 302B are aligned in a planar shape.

The horseshoe-shaped dividing plate 302A shown in FIG. 26 is obliquely crossed at the outer edge and at the inner edge between each of the pins 314 provided on the lower surface of the horseshoe-shaped dividing plate 302A that is a boundary surface with the support base 303. For the first saw guide that extends between the outer edge and the inner edge of the front and rear (front side of the tooth and the rear side of the tooth) so as to be obliquely crossed and having a width and depth of several millimeters. A groove 305a is provided.
The half-moon shaped dividing plate 302B has a plurality of third saw guide grooves 305c formed from the front tooth side (hard palate side) to the back tooth side (soft palate side). In the horseshoe-shaped divided plate 302A, the third saw guide groove is not formed so as to be continuous with the third saw guide groove 305c, but may be formed.
On the other hand, the support base 303 corresponds to the first saw guide groove 305a and the third saw guide groove 305c, and between the pin insertion holes 306 on the upper surface thereof (of the support base 303), Between the outer edge and the inner edge of the front and rear (front side of the tooth and the rear side of the tooth) so as to be oblique to the outer edge of the gum part 303A and obliquely to the inner edge of the gum part 303A A first saw standby groove 304a having a width and a depth of about several millimeters is provided.
The palate portion 303B of the support base 303 is formed with a plurality of third saw standby grooves 304c from the front tooth side (hard palate side) to the back tooth side (soft palate side), and the gum portion of the support base 303 In 303A, a plurality of second saw standby grooves 304b are formed so as to be continuous with the third saw standby grooves 304c.

The pins 314 are formed on the lower surface of the dividing plate 302 at appropriate intervals between the tooth positions of the gums and the palate, and the first saw guide groove 305a and the third saw guide groove 305c are located between the pins 314. In FIG. 4, the lower surface of the dividing plate 302 extends continuously in the front-rear direction and in a radial manner at appropriate intervals.
Further, the pin insertion hole 306 is formed on the upper surface side of the support base 303 with an appropriate interval between the tooth position of the gum and the palate portion, and the first saw standby groove 304a and the second saw standby groove. 304b and the third saw standby groove 304c are arranged between the pin insertion holes 306 in the front-rear direction and the radial direction at appropriate intervals on the upper surface of the support base 303 corresponding to the positions of the pins 314. It extends continuously for a long time.
The third saw standby groove 304c and the third saw guide groove 305c are formed to be used when the palate portion and the front tooth portion of the impression model 301 are cut.
The gypsum dedicated saw 9 is prepared along the first saw standby groove 304a, the second saw standby groove 304b, and the third saw standby groove 304c, and the divided plates 302 are laminated, and the first saw guide of the divided plates 302 is performed. It rounded up to use grooves 305a and the third saw guiding grooves 305c (along the line a) that is, the dividing method which can reliably secure a basal plane C ₁ of the abutment tooth C.

Although the base for the dental technician work model according to the present invention has mainly described the case of a deviated jaw, it can be sufficiently applied to the entire jaw case.
Until now, in all jaw cases, it has been difficult to visually check the tongue and palate by applying pins 14 to the lower part of the dividing plate 2, but the base of the dental technician work model according to the present invention is It was possible to confirm the fit of the oral contact portion with the edge of the denture and the denture base.

As shown in FIG. 27, the modified divided plate 102 is formed with a position mark 102M for confirming the position of the pin 114 when the gypsum tooth mold of the patient is attached to the upper portion with an adhesive. .
The position mark 102M is selected from shapes such as a circle, a double circle, letters, numbers, and symbols.
In addition, even when a large amount of adhesive is applied to the divided plate 102 when the gypsum tooth mold is attached to the upper portion thereof with an adhesive, the adhesive does not leak to the lower support base 103. Further, as shown in FIG. 27, an annular or square annular recess 102r is formed. The concave line 102r is formed by carving with a round rail-shaped object.
As shown in FIG. 28, the divided plate 102 as a modification is finely formed with a dimple hole 102d as shown in FIG. The hole 102d is formed to prevent leakage of the adhesive when the gypsum tooth mold is attached with an adhesive.
The position mark 102M cannot be confirmed when the position mark 102M of the pin 114 is overlapped with the patient's plaster model when the divided plate 102 is cut by the plaster saw 9. Therefore, as shown in FIG. 29, the modified divided plate 102 is formed by piercing the parallel mark 102L on one side or both sides from the position mark 102M of the pin 114, and confirming the position of the river. it can.
When the line mark 102L is formed on one side, as shown in FIG. 30, the support base 103 has the line mark 103L formed in a groove shape on the front wall on the extension of the line mark 102L. It is formed.
The line mark 102L and the line mark 103L are configured so that regular directionality (orientation of the surface) can be confirmed in the operation of dividing the upper divided plate 102 with the plaster saw 9 and then returning it to the support base 103. Has been.

The dividing plate 102 is divided by the plaster saw 9 after the patient's plaster tooth mold is attached to the dividing plate 102 with an adhesive.
Then, the patient's plaster mold and the dividing plate 102 are cleaned with hot water or the like at the time of the dental technical work, and may be mixed by a plurality of persons during the work.
At this time, it is convenient if the reference number of the divided plate 102 is written on a part of the plate.
For example, if four divided plates 102 are formed by a mold, it can be determined as A plate, B plate, C plate, and D plate by the symbols A, B, C, and D, so that work efficiency is improved. be able to.
As shown in FIGS. 21 and 22, the division plate 102 may have the reference number 102N stamped on the flat portion at the tip of the pin 114 or the reference number 102N stamped on the side surface of the pin 114.
In addition, the reference number 102N may be formed at a place where the side edge of the divided plate 102, the upper surface portion, the back surface portion, etc. of the divided plate 102 are easy to see.
The description method of the reference number 102N may be formed so as to be engraved when the divided plate 102 is molded.

  INDUSTRIAL APPLICABILITY The present invention can be widely used for dental work as a base for a dental technician work model for the production of dental prostheses and the production of dentures.

A Abutment cutting line from the bottom with a saw for an incorrect dentition case B B Abutment cutting line from the top with a saw for an incorrect dentition case C Abutment tooth, remaining tooth C ₁ Base surface D Saw for a normal dentition case Cutting line in one step from above E handpiece F chamfered portion of upper cheek tongue side of split plate L bowl-shaped dent M circular recess N linear groove 1 impression model 2 split plate 3 support base 4 Saw standby groove 5 Saw guide groove 6 Pin insertion hole 7 Prosthesis 8 Upper end 9 Gypsum dedicated saw 10 Anti-rotation groove 13 Projection 14 Pin 100 Fitting device 101 Impression model 102 Dividing plate 102d Hole 102L Line mark 102M Position mark 102N Serial number 102r Concave 103 Support base 103L Line mark 104 Saw standby groove 105 Saw guide groove 106 Pin insertion hole 114 Pin 122 Concave 130 upper wall 131 side wall 132 front wall 133 rear wall 134 partition wall 135 recessed portion 136 convex portion 140 fitting base 142 fitting convex portion 144a, 144b holding convex portion 146 bonding convex portion 148 fitting sandwiching portion 160 separating plate 162 fitting Joint hole 190 Articulator 191 Lower jaw support part 192 Spring 193a, 193b Post 194 Support hole 195 Open end 196 Upper jaw support part 200 Base 201 Impression model 202 Divided plate 203 Support base 204 Saw standby groove 204a First Saw standby groove 204b Second saw standby groove 204c Third saw standby groove 205 Saw guide groove 205a First saw guide groove 205b Second saw guide groove 205c Third saw guide groove 206 Pin insertion hole 208 Upper end 210 Anti-rotation groove 213 Convex strip 214 Pin 222 Concave portion 236 Convex portion 3 00 base 301 impression model 302 divided plate 302A horseshoe-shaped divided plate 302B half-moon shaped divided plate 303 support base 303A gum part 303B palate part 304 saw standby groove 304a first saw standby groove 304b second saw standby groove 304c second 3 saw standby groove 305a first saw guide groove 305c third saw guide groove 305 saw guide groove 306 pin insertion hole 314 pin

Claims (11)

A fitting base having a split plate on which an impression model is placed, a support base coupled to the split plate, and a fitting convex part to be fitted into a recess formed on the lower surface of the support base. Prepared,
The split plate is provided with a plurality of pins on a surface to be joined to the support base,
The support base includes a pin insertion hole for inserting the pin so that the pin can be inserted and removed, and a pin is inserted into the pin insertion hole to connect the divided plate to a fixed position of the support base. A dental work model fitting device configured to fit a fitting convex portion of a fitting base into a concave portion formed on a lower surface of the fitting base and connect the fitting base to a support base. A resin-made support base, a resin-made split plate having a plurality of pins that are connected to a fixed position of the support base, and an impression model placed on the split plate; a support base; A fitting base having a fitting convex part that is closely fitted to the concave part of the lower surface of the base,
The support base includes a pin insertion hole for inserting the pin so that the pin can be inserted and removed, the pin is inserted into the pin insertion hole, the divided plate is connected to a fixed position of the support base, and the support base A dental work model fitting device configured to fit a fitting convex portion of a fitting table into a recess formed on a lower surface of the table, and to connect the fitting table to a support base. A support base made of resin, a split plate having a plurality of pins connected to be fixed at a fixed position of the support base, an impression model placed on the split plate, and four corners of the support base Including a fitting base having a plurality of fitting pinching portions for tightly fixing to
The support base includes a pin insertion hole for inserting a pin so that the pin can be inserted and removed, and a pin is inserted into the pin insertion hole to connect the divided plate to a fixed position of the support base. A dental work model fitting device configured to fit corners at fitting pinching portions of a fitting table and fix the fitting table to a support base.   A holding convex portion having an upper surface that is slightly larger than the lower surface of the support base and extending across both ends of the short end at both ends of the bottom surface, and an adhesive convex portion provided on the lower surface; The dental work model fitting device according to any one of claims 1 to 3, further comprising a separation plate made of a flexible material to be fitted to the bonding convex portion.   5. The fitting base according to claim 1, wherein a fitting pinching portion for fitting a corner portion of the support base to fix the support base is projected on the upper surface of the fitting base. The dental work model fitting device described.   A convex portion is provided on either the upper surface of the support base or the lower surface of the split plate, and a concave portion corresponding to the convex portion is provided on either the upper surface of the support base or the lower surface of the split plate. The dental work model fitting device according to any one of claims 1 to 5.   The dental work model fitting device according to any one of claims 1 to 6, wherein the support base is provided with a plurality of saw standby grooves on a surface joined to the divided plate. The dividing plate is provided with a plurality of saw guide grooves on the surface joined to the support base,
And / or
The support base is provided with a plurality of saw standby grooves on the surface joined to the divided plate,
The dental work model fitting device according to any one of claims 1 to 7, wherein a saw guide groove of the divided plate and a saw standby groove of the support base are opposed to each other. A first step of inserting a pin into a pin insertion hole to be inserted so that the pin can be inserted and removed, and arranging the divided plate at a fixed position of the support base;
A second step of fixing the impression model to the divided plate with an adhesive; and
The saw is placed along the saw standby groove on the support base, and the both sides of the impression model abutment teeth are turned up from the saw guide groove on the divided plate to the split transition near the neck of the impression model. Process,
A method for producing a dental work model, comprising: a fourth step of cutting down from both upper sides of the abutment tooth of the impression model to a split transition portion of the third step and connecting with the cut portion rounded up in the third step. A first step of inserting a pin into a pin insertion hole to be inserted so that the pin can be inserted and removed, and arranging the divided plate at a fixed position of the support base;
A second step of fixing the impression model to the divided plate with an adhesive; and
Along the saw with the saw stand groove on the support base, facing the both sides of the impression model abutment teeth, round up from the saw stand groove on the support base to the split transition near the neck of the impression model. 3 steps,
A method for producing a dental work model, comprising: a fourth step of cutting down from both upper sides of the abutment tooth of the impression model to a split transition portion of the third step and connecting with the cut portion rounded up in the third step. The dividing plate is provided with a plurality of saw guide grooves on the surface joined to the support base,
And / or
The support base is provided with a plurality of saw standby grooves on the surface joined to the divided plate,
The method for manufacturing a dental work model according to claim 9 or 10, wherein the divided plate and the support base are configured to be closely fitted.

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