JP2020116177A - Dental work model - Google Patents

Abstract

To provide a dental work model reducing cut-off of dowel pins when cutting a dental cast and, when the dental cast is turned upside down, capable of suppressing falling of the cut dental cast.SOLUTION: A dental work model includes a fixing plate 6 to which a dental cast 4 is fixed, a plurality of dowel pins 8 driven in the fixing plate 6, and a support base 10 for supporting the fixing plate 6. The support base 10 includes a plurality of insertion holes 20 at support area 18 thereof, and the support holes 20 are disposed at a specific lateral part side with respect to a width-direction center line of the support area 18. The support base 10 further includes a first engagement projecting strip 26 and a second engagement projecting strip 28 at the specific lateral part side and the other lateral side respectively. The second engagement projecting strip 28 includes, at an inside face thereof, a plurality of auxiliary engagement projection strips 30 extending toward the specific lateral part side, and the plurality of auxiliary engagement projection strips 30 are so configured that 1.5 to 5 auxiliary engagement projection strips are provided between adjacent insertion holes 20.SELECTED DRAWING: Figure 2

Description

The present invention relates to a work model for dental technics used in dental treatment and the like.

Generally, a working model for dental technique used in dental treatment includes a fixing plate to which a tooth profile model is fixed, a plurality of dowel pins implanted in the fixing plate, and a support base for supporting the fixing plate. And (for example, see Patent Document 1). The support base is made of synthetic resin, and a support region for supporting the fixing plate is provided on the upper surface of the support base, and a plurality of insertion holes are provided at intervals in the support region. At the same time, a one-side engaging protrusion and another-side engaging protrusion are provided on the one side portion and the other side portion. Further, in this support region, a plurality of engagement assisting protrusions are arranged at intervals between the one-sided engagement protrusions and the plurality of insertion holes, and these engagement assisting protrusions are provided in the support region. It is provided along the longitudinal direction. Further, the fixing plate is formed of gypsum, and on the lower surface thereof, one side engaging concave line and the other side engaging concave line corresponding to the one side engaging protrusion line and the other side engaging protrusion line on the support base side. In addition to being provided, a plurality of engagement auxiliary recesses are provided corresponding to the plurality of engagement auxiliary protrusions on the support base side.

In this work model for dental technics, when the dowel pins implanted in the fixing plate are inserted into the insertion holes of the supporting base, the fixing plate is supported by the supporting region of the supporting base. In this supporting state, the one-side engaging projection and the other-side engaging projection on the support base side and the one-side engaging recess and the other-side engaging recess on the fixing plate side are disengageably engaged with each other. At the same time, the plurality of engagement auxiliary projections on the support base side and the plurality of engagement auxiliary recesses on the fixing plate side are engageably and disengageably engaged.

Then, in the state where the fixing plate is thus mounted, the tooth profile model is fixed to the upper surface of the fixing plate by an adhesive or the like, and the predetermined portion of the tooth profile model is cut together with the fixing plate in the thus fixed state, A required dental technical work (for example, production of a dental prosthesis) is performed using the cut tooth profile model. At this time, the one-side engaging concave line and the other-side engaging concave line on the fixing plate side and the one-side engaging ridge line and the other-side engaging ridge line on the support base side that have been cut are engaged with each other and fixed. Since the engagement assisting concave portion on the working plate side and the engagement assisting protrusion on the support base side are engaged with each other, rotation of the cut fixing plate with respect to the support base is suppressed, and thus, the dental technician Work (for example, production of a dental prosthesis) can be performed with high accuracy and reliability.

JP, 2005-24157, A

However, in the conventional dental work model as described above, a plurality of insertion holes are provided along the longitudinal direction at the widthwise central portion of the support region of the support base (in other words, these insertion holes). Since the dowel pin on the side of the fixing plate is inserted into the above), there is a risk that the dowel pin may be cut at the time of cutting in the dental technical work.

Particularly, when the tooth profile model is a full-jaw type, the fixing plate is provided with 14 dowel pins corresponding to the number of teeth, and the support base is provided with 14 insertion holes corresponding to the dowel pins. In connection with this, in the longitudinal center and in the vicinity of the supporting area of this support base, the distance between the adjacent dowel pins becomes narrow, and therefore, due to a working error during cutting, May disconnect. If the dowel pin is cut during the cutting operation, this dental technical work must be restarted from the beginning, and the tooth profile model will be re-acquired.

Moreover, the working model for dental technicians that has been cut may be moved during the dental technician work, and may be turned over and moved during this movement. In the conventional dental work model, as described above, since a plurality of insertion holes are provided in the center portion in the width direction of the support region of the support base, when the dental work model is turned over. , The dowel pin of the cut tooth profile model may fall off the insertion hole on the support base side, and if dropped, the cut tooth profile model may be damaged.

The object of the present invention is to reduce the cutting of the dowel pin when cutting the tooth profile model, and to prevent the cut tooth profile model from dropping when the dental model tooth profile model is turned over. It is to provide a model.

In the first aspect of the present invention, a dental technician including a fixing plate to which the tooth profile model is fixed, a plurality of dowel pins implanted in the fixing plate, and a support base for supporting the fixing plate. A working model,
The support region provided on the upper surface of the support base is provided with a plurality of insertion holes into which the plurality of dowel pins are inserted, and the plurality of insertion holes are formed in a width direction of the support region of the support base. It is located on the specific side from the center line,
Further, the specific side portion of the support region of the support base and the other side portion facing the specific side portion are provided with a first engagement protrusion and a second engagement protrusion that protrude upward. A plurality of auxiliary engagement ridges extending toward the specific side portion are provided on an inner surface of the second engagement ridge, and the plurality of auxiliary engagement ridges are provided between adjacent insertion holes. .5 to 5 are provided,
A first engaging groove and a second engaging groove are provided on the lower surface of the fixing plate in correspondence with the first engaging ridge and the second engaging ridge of the support region. In addition, there is provided a working model for dental technician characterized in that a plurality of auxiliary engagement recesses are provided corresponding to the plurality of auxiliary engagement ridges of the support region.

Further, according to the second aspect of the present invention, there is provided a fixing plate to which the tooth profile model is fixed, a plurality of dowel pins implanted in the fixing plate, and a support base for supporting the fixing plate. A working model for dental technicians,
The support region provided on the upper surface of the support base is provided with a plurality of insertion holes into which the plurality of dowel pins are inserted, and the plurality of insertion holes are formed in a width direction of the support region of the support base. It is located on the specific side from the center line,
Further, the specific side portion of the support region of the support base and the other side portion facing the specific side portion are provided with a first engagement protrusion and a second engagement protrusion that protrude upward. A plurality of auxiliary engagement ridges extending toward the specific side portion are provided on the inner side surface of the second engagement ridge, and each of the tip ends of the plurality of auxiliary engagement ridges is provided with an upward direction. A protruding tip is provided,
A first engaging groove and a second engaging groove are provided on the lower surface of the fixing plate in correspondence with the first engaging ridge and the second engaging ridge of the support region. In addition, a plurality of auxiliary engagement ridges are provided corresponding to the plurality of auxiliary engagement ridges in the support area, and the support base is provided at each of the tip end portions of the plurality of auxiliary engagement ridges. A working model for dental technician is provided, in which a tip recess is provided corresponding to the tip projection on the table side.

Further, in the third aspect of the invention, a fixing plate to which the tooth profile model is fixed, a plurality of dowel pins implanted in the fixing plate, and a support base for supporting the fixing plate are provided. A working model for dental technicians,
The support region provided on the upper surface of the support base is provided with a plurality of insertion holes into which the plurality of dowel pins are inserted, and the plurality of insertion holes are formed in a width direction of the support region of the support base. It is located on the specific side from the center line,
Further, the specific side portion of the support region of the support base and the other side portion facing the specific side portion are provided with a first engagement protrusion and a second engagement protrusion that protrude upward. A plurality of auxiliary engagement ridges extending toward the specific side portion are provided on an inner surface of the second engagement ridge, and tip ends of the plurality of auxiliary engagement ridges are formed in the support region. Extends to the specific side portion side to the center line in the width direction or beyond the center line,
A first engaging groove and a second engaging groove are provided on the lower surface of the fixing plate in correspondence with the first engaging ridge and the second engaging ridge of the support region. In addition, a plurality of auxiliary engagement ridges are provided corresponding to the plurality of auxiliary engagement ridges of the support region, and the plurality of auxiliary engagement ridges are formed in the center of the fixing plate in the width direction. There is provided a dental technician working model, characterized in that it extends to a line or beyond said central line.

According to the work model for dental technique of the first aspect of the present invention, the support region of the support base is provided with a plurality of insertion holes into which a plurality of dowel pins on the fixing plate side are inserted, and these insertion holes are provided in the support region. Since it is arranged on the specific side side with respect to the center line in the width direction, the width of the supporting area on the specific side side (that is, the width from the specific side end to the insertion hole) is the other side side. Is smaller than the width (that is, the width from the other end to the insertion hole). When cutting the working model, the specific side of the support base is positioned on the operator side, and the working model is cut in such a state that the tooth profile fixed to the fixing plate is cut. It is possible to reduce the cutting of the dowel pin when cutting the model.

Further, in such a working model, the center of gravity in the width direction of the fixing plate to which the tooth profile model is fixed is located substantially on the center line in the width direction, while a plurality of dowel pins on the fixing plate side are inserted. Since the insertion hole is located on one side of the support area, the center of gravity of the fixing plate to which the tooth model is fixed is displaced from the dowel pin in the width direction. When the support base is turned upside down with the mounting plate attached, the force acting on the center of gravity of the fixing plate in the width direction acts to press the dowel pin against the inner peripheral surface of the insertion hole. It is possible to effectively prevent the dowel pin from coming off from the insertion hole.

In addition, a first engaging protrusion and a second engaging protrusion are provided on a specific side portion and the other side portion on the support base side, and a first engaging concave line and a second engaging concave line on the fixing plate side. In addition, a plurality of auxiliary engagement ridges are provided on the inner surface of the second engagement ridge on the support base side, and a plurality of auxiliary engagement ridges are provided on the fixing plate side. When the plurality of dowel pins on the fixing plate side are inserted into the plurality of insertion holes on the supporting base side and mounted, the first engaging ridges and the second engaging protruding ridges on the supporting base side and the fixing plate side The first engaging groove and the second engaging groove are engaged with each other in a disengageable manner, and the plurality of auxiliary engaging protrusions on the support base side and the plurality of auxiliary engaging recesses on the fixing plate side. Since the and are engaged with each other in a detachable manner, the support base and the fixing plate are surely engaged with each other, and even when the dental model fixed to the fixing plate is cut, the looseness of the cut fixing plate And rotation (rotation around the dowel pin) can be suppressed.

Furthermore, since the plurality of auxiliary engagement protrusions on the support base side are provided between 1.5 to 5 between the adjacent insertion holes (that is, between the centers of the adjacent insertion holes), the dental model is cut. Then, the cut piece now includes at least one auxiliary engagement ridge, which more securely engages the support base and the fixing plate, and fixes the fixing plate to the fixing plate. Even when the dental model is cut, rattling and rotation (rotation around the dowel pin) of the cut fixing plate can be further suppressed.

Further, according to the working model for dental technique of the second aspect of the present invention, the basic configuration thereof is the same as that of the first aspect of the present invention, and therefore, the same operational effect as described above can be obtained. In addition, a plurality of auxiliary engagement ridges extending toward the specific side portion are provided on the inner side surface of the second engagement ridges on the support base side, and the tip portions of the plurality of auxiliary engagement ridges are provided. Each of them is provided with a tip projection protruding upward, and a plurality of auxiliary engagement recesses corresponding to the plurality of auxiliary engagement projections on the support base side are provided on the lower surface of the fixed plate. Since each of the tip portions of the plurality of auxiliary engaging groove portions is provided with a tip concave portion corresponding to the tip projection portion on the support base side, the fixing plate is provided in the plurality of insertion holes on the support base side. When a plurality of dowel pins on the side are inserted and mounted, a plurality of auxiliary engaging protrusions on the support base side and a plurality of auxiliary engaging concave lines on the fixing plate side are detachably engaged, and The tip projections of the auxiliary engagement projections are engaged so as to bite into the tip recesses of the plurality of engagement assist recesses so as to engage and disengage freely, thereby reliably engaging the support base and the fixing plate, Even when the dental model fixed to the fixing plate is cut, rattling and rotation (rotation around the dowel pin) of the cut fixing plate can be suppressed.

Further, according to the dental work working model of the third aspect of the invention, the basic configuration thereof is the same as that of the first aspect of the invention, so that the same operational effect as described above can be obtained. In addition, a plurality of auxiliary engagement ridges extending toward the specific side portion are provided on the inner side surface of the second engagement ridges on the support base side. A plurality of auxiliary engagements corresponding to the plurality of auxiliary engagement ridges of the support region, which extend to a specific side portion to the center line in the width direction of the support region or beyond the center line. Since the plurality of auxiliary engaging groove portions are provided to the center line in the width direction of the fixing plate or beyond the center line, the plurality of auxiliary engaging groove portions are used for fixing to the plurality of insertion holes on the support base side. When the plurality of dowel pins on the plate side are inserted and mounted, the plurality of auxiliary engaging protrusions on the support base side and the plurality of auxiliary engaging concave lines on the fixing plate side are disengageably engaged. The engagement state of the auxiliary engagement protrusions and the plurality of auxiliary engagement recesses extends to the center line of the support region in the width direction or beyond the center line. Even when the dental model fixed to the fixing plate is securely engaged with the plate, the rattling and rotation of the cut fixing plate (rotation around the dowel pin) can be suppressed.

1 is a perspective view showing a first embodiment of a dental technician work model according to the present invention. The perspective view which shows the state before attaching a fixing plate in the working model of FIG. Sectional drawing by the III-III line in FIG. The figure for demonstrating the effect|action of the force when the working model of FIG. 1 is turned to the opposite. FIG. 2 is an exploded perspective view showing a state before the working model of FIG. 1 is manufactured. Sectional drawing which shows the state which injected the gypsum in the molding base frame with which the support base was equipped. The top view which shows the upper surface of the support base in 2nd Embodiment of the working model for dental labor according to this invention. Sectional drawing which shows the state which mounted the fixing plate to which the dental model was fixed to the support base of FIG. Sectional drawing which shows 3rd Embodiment of the working model for dental technicians according to this invention. The top view which shows the support base in 4th Embodiment of the working model for dental technicians according to this invention. The top view which shows the support base in 5th Embodiment of the working model for dental technicians according to this invention. Sectional drawing by the XII-XII line in FIG. The top view which shows the support base in 6th Embodiment of the working model for dental labor according to this invention. The top view which shows the support base in 7th Embodiment of the working model for dental technicians according to this invention.

Hereinafter, various embodiments of a working model for dental technique according to the present invention will be described with reference to the accompanying drawings.

<First Embodiment>
First, with reference to FIGS. 1 to 6, a working model for dental technique of the first embodiment will be described. 1 to 3, the illustrated dental technician working model 2 includes a fixing plate 6 to which the tooth profile model 4 is fixed, five dowel pins 8 planted in the fixing plate 6, and a fixing plate 6. And a support base 10 for supporting.

The support base 10 includes a support base body 12, and the support base body 12 is made of, for example, a synthetic resin such as polyethylene resin, polypropylene resin, nylon resin, or urethane resin. The support base body 12 has a laterally long and cylindrical peripheral side wall 14, and a laterally long upper wall 16 that covers an upper surface of the peripheral side wall 14. In this embodiment, the entire upper surface of the upper wall 16 (a portion defining the upper surface of the support base 10) functions as a support region 18 for supporting the fixing plate 6, as can be understood from FIG. 3. ..

In the support region 18 of the support base body 12, five insertion holes 20 are provided at intervals in the longitudinal direction (the direction from the lower left to the upper right in FIGS. 1 and 2 and the direction perpendicular to the paper surface in FIG. 3). It is provided. A cylindrical protrusion 24 extending downward from the lower surface of the upper wall 16 is provided in the internal space 22 formed inside the peripheral side wall 14 so as to correspond to each insertion hole 20, and each insertion hole 20 includes the upper wall 16 and It is provided so as to penetrate the cylindrical protrusion 22 (see FIG. 3 ). Each insertion hole 20 is formed in a taper shape in which the inner diameter gradually decreases from the upper end of the cylindrical protrusion 24 toward the lower end. In this embodiment, when the fixing plate 6 is mounted on the support base 10, the tip of the dowel pin 8 penetrates through the insertion hole 20 and projects somewhat downward.

In addition, a first side portion protruding upward is attached to a specific side portion (upper left side portion in FIGS. 1 and 2 and left side portion in FIG. 3) on the upper surface (that is, the support region 18) of the upper wall 16. The ridge 26 is provided, and the second engaging ridge 28 projecting upward is provided on the other side portion (the lower right side portion in FIGS. 1 and 2, the right side portion in FIG. 3). It is provided. The first engagement protrusions 26 and the second engagement protrusions 28 are arranged so as to face each other, and are provided over substantially the entire length in the longitudinal direction of the support base body 12, and the first engagement protrusions are provided at both ends thereof. The strip 26 and the second engagement protrusion 28 are omitted. The first engagement protrusions 26 and the second engagement protrusions 28 are formed, for example, at the same height from the surface of the upper wall 16, and the protrusion height H1 from the upper wall 16 (see FIG. 5) is It is set to about 1.0 to 3.0 mm.

In this embodiment, the plurality of insertion holes 20 (specifically, the center line P2 thereof) are located above the upper surface of the support base 10 (support base body 12), that is, the center line P1 in the width direction of the support region 18. In the case where the plurality of insertion holes 20 are arranged on the specific side portion side, that is, on the side of the first engagement protrusions 26, and the plurality of insertion holes 20 are arranged in a row (so-called single type), a plurality of insertion holes are provided. It means that the center line P1 of 20 is arranged on the specific side portion side of the center line P1, and it is preferable that the entire plurality of insertion holes 20 are arranged on the specific side portion side of the center line P1. .. The plurality of insertion holes 20 are provided along the upper surface (that is, the support area 18) of the support base body 12, and the width of the upper surface (that is, the support area 18) of the upper wall 16 of the support base body 12 is W. Then, the distance W1 from the specific side end (specifically, the distance to the center line P2 of the insertion hole 20) is, for example, in the range of (W/5)<W1<(W/2), Preferably, they are arranged in the range of W/4<W1<2W/5), for example.

Further, in connection with this, a plurality of auxiliary engagement ridges 30 are provided in the support region 18 of the support base 12. These auxiliary engagement ridges 30 linearly extend inward from the inner side surface of the second engagement ridges 28 of the support base 12 (that is, the side surface facing the first engagement ridges 26). In the embodiment, the support base 12 extends beyond the center line P1 in the width direction, but it may be configured to extend to the center line P1 or to extend to the vicinity of the center line P1. You may

As shown in FIG. 3, the height H1 of the plurality of auxiliary engagement protrusions 30 is, for example, about 1/20 to 3/5 of the height H of the second engagement protrusions 28 (H/20< It is set to H1<3H/5), and for example, it is preferable to set the height to about 1/10 to 2/5 (H/10<H1<2H/5).

Further, on the outer peripheral surface of the peripheral side wall 14, a positioning projection 32 is provided corresponding to each of the plurality of insertion holes 20 (in other words, corresponding to the dowel pin 8 of the fixing plate 6). The positioning protrusions 32 are arranged on both sides of the insertion hole 20 with the insertion hole 20 interposed therebetween.

The fixing plate 6 includes a plate body 34 made of gypsum, and the plate body 34 has a horizontally long shape corresponding to the shape of the upper wall 16 of the support base body 12. Five dowel pins 8 are planted in the fixing plate 6 so as to correspond to the respective insertion holes 18 of the support base body 12. The dowel pin 8 is formed in a taper shape in which the outer diameter gradually decreases from the base end portion to the tip end portion in correspondence with the insertion holes 18 formed in the taper shape as described above. The base end of the dowel pin 8 embedded in the fixing plate 6 is knurled to increase the fixing strength with respect to the fixing plate 6.

In addition, the lower surface of the fixing plate 6 (that is, the plate body 34) (that is, the surface on which the dowel pin 8 projects) is supported on one side (the side corresponding to the specific side of the support base 10). A first engagement groove 36 is provided corresponding to the first engagement protrusion 26 on the base 10 side, and the other side portion (side portion corresponding to the other side portion of the support base 10) A second engaging groove 38 is provided corresponding to the second engaging protrusion 28 of the support base 10. The first engaging groove 36 and the second engaging groove 38 extend upward and extend in the longitudinal direction of the fixing plate 6.

On the lower surface of the fixing plate 6 (plate body 34), a plurality of auxiliary engaging recesses 40 corresponding to the plurality of auxiliary engaging protrusions 30 on the support base 10 side are further provided. The auxiliary engagement groove 40 extends linearly inward from the inner surface of the second engagement groove 38.

The plurality of auxiliary engagement protrusions 30 (and the plurality of auxiliary engagement recesses 40) are provided between the pair of adjacent insertion holes 20, that is, from the center line P1 of one insertion hole 20 to the center line of the other insertion hole 20. About 1.5 to 5 pieces are provided in the space between P1 and P1, so that the tooth profile model piece cut as described later is engaged with at least one auxiliary engagement ridge 30. Therefore, it is preferable to provide 2 to 5 between the adjacent insertion holes 20, and by providing in this way, the cut tooth profile model piece is more likely to be engaged with at least two auxiliary engagement ridges 30. The engagement can be ensured.

A tooth profile model 4 (partial tooth type in this embodiment) made of gypsum is fixed to the upper surface of the fixing plate 6. The fixing plate 6 is detachably supported by the upper surface (that is, the support region 18) of the upper wall 16 of the support base body 12 by detachably inserting the dowel pins 8 into the corresponding insertion holes 20. In this supporting state, as shown in FIG. 3, the first engaging groove 36 and the second engaging groove 38 on the fixing plate 6 (plate body 34) side, the supporting base 10 (the supporting base body 12). ) Side first engaging ridges 26 and second engaging ridges 28 are detachably engaged with each other, and a plurality of auxiliary engaging recesses 40 on the fixed plate 6 side and the support base 10 are provided. The plurality of auxiliary engagement ridges 38 on the (support base body 12) side are detachably engaged with each other.

Next, with reference to mainly FIG. 3 and FIGS. To manufacture the working model 2, plaster is poured into a tooth model (not shown) to manufacture the tooth model 4, and the support base 12 is manufactured by, for example, injection molding using synthetic resin. Then, as shown in FIG. 5, the dowel pins 8 are detachably inserted into the respective insertion holes 20 of the support base 10 (support base body 12) from the tip end side (dowel pin insertion step). When inserted in this way, the base end portion of the dowel pin 8 projects a predetermined length (for example, about 3 to 4 mm) upward from the upper surface of the support base 10, that is, the upper wall 16 of the support base body 12. (See Figure 6).

Then, as shown in FIGS. 5 and 6, the molding base frame 42 is detachably mounted on the upper part of the support base body 12 (base frame mounting step). Here, the molding base frame 42 used in the base frame mounting step will be described. The molding base frame 42 has a substantially rectangular outer shape as a whole and is formed of a rubber material such as silicon rubber or synthetic rubber. .. A through-opening 44 that penetrates in the vertical direction is provided inside the molding base frame 42, and the through-opening 44 has a shape corresponding to the shape of the upper portion of the support base body 12.

When the molding base frame 42 is mounted on the upper portion of the support base body 12, the upper ends of the upper wall 16 and the peripheral side wall 14 of the support base body 12 are inserted into the lower ends of the through openings 44, as shown in FIG. The inner peripheral surface of the molding base frame 42 is attached so as to be in close contact with the outer peripheral surface of the peripheral side wall 14. At this time, the lower end of the molding base frame 42 is brought into contact with and supported by the positioning projection 32 of the support base body 12, whereby the molding base frame 42 is positioned with respect to the support base body 12. In this mounted state, the molding base frame 42 comes to protrude upward from the upper surface of the upper wall 16 of the support base main body 12 by a predetermined height (for example, about 7 to 10 mm). The injection space 46 is defined by the upper surface of 12 and the inner peripheral surface of the molding base frame 42.

Then, the plaster 48 for molding the fixing plate 6 is injected into the injection space 46 (plate forming step). The plaster 48 is poured until the base end of the dowel pin 8 is completely immersed in the plaster 48. At this time, since the first engaging protrusion 26 and the second engaging protrusion 28 do not exist at both ends (specific side and other side) of the upper wall 16 of the support base body 12, the injected plaster 48 is used. Will flow to both ends of the upper wall 16, and the gypsum 48 can be poured almost uniformly over the entire area of the upper wall 16.

By hardening the gypsum 46 injected into the injection space 46, the dowel pin 8 is implanted and the first engagement groove 36 (a groove corresponding to the first engagement projection 26 on the support base 10 side), The second engagement groove 38 (a groove corresponding to the second engagement protrusion 28 on the support base 10 side) and the plurality of auxiliary engagement grooves 40 (a plurality of auxiliary engagement protrusions on the support base 10 side). The fixing plate 6 in which a recessed line corresponding to 30 is formed is molded.

After that, the molding base frame 42 is removed from the upper portion of the support base body 12, and the upper surface of the fixing plate 6 is subjected to, for example, grinding to be processed to be flat (grinding process). This processing is performed with the fixing plate 6 attached to the upper surface of the support base body 12, and is performed until the base end surface of the dowel pin 8 is exposed to the outside.

After that, the tooth profile model 4 is fixed to the upper surface of the fixing plate 6 (plate body 34) that has been ground by using an adhesive or the like (tooth profile model fixing step), and as shown in FIGS. The working model 2 for dental technician can be manufactured. When the work model 2 is used for the work, the fixing plate 6 is supported by the support base 10 and a predetermined portion of the tooth profile model 4 (that is, adjacent to the tooth profile model 4 is indicated by a dashed line 52 in FIG. 1). The portion between the pair of dowel pins 8 to be cut is cut together with the fixing plate 6 using a cutting tool (not shown) (model cutting step).

At this time, the specific side portion of the support base 10 (the side portion provided with the first engagement protrusion 26) is positioned so as to be positioned on the front side of the operator, and the tooth profile model 4 is cut in such a position. By performing the cutting in this way, the dowel pin 8 is not damaged even if the cutting blade of the cutting tool is cut in a slightly inclined state, and damage to the dowel pin 8 can be avoided.

When the fixing plate 6 is cut in this way, the first engaging projection 26 and the second engaging projection 28 on the support base 10 side are also formed with the cut 54 by the cutting tool. By cutting in this manner, the cut portion of the tooth profile model 4 can be taken out from the remaining portion together with the fixing plate 6 and the dowel pin 8. As described above, since the positioning projection 32 is provided on the peripheral side wall 14 of the support base main body 12 in correspondence with the insertion hole 20, when the tooth profile model 4 is cut, this positioning projection 32 is provided. By visually observing the portion 32, the location of the dowel pin 8 can be easily confirmed.

In this dental work model 2, it is possible to prevent the cut tooth profile model piece 4A from falling from the support base 10. With reference to FIG. 4, in such a dental laboratory work model 2, the center of gravity G in the width direction of the fixing plate 6 (plate body 34) to which the tooth profile model 4 is fixed is approximately the center line P1 in the width direction. On the other hand, the dowel pin 8 on the side of the fixed plate 6 is inserted into the plurality of insertion holes 20 which are located on one side of the support region 16 on the side of the specific side (the first engaging protrusion 26). Therefore, the center line P2 of the insertion hole 20 (that is, the center line of the dowel pin 8) is located at a position displaced by the distance D in the width direction from the center of gravity G in the width direction of the fixing plate to which the tooth profile model is fixed. .. Therefore, when the support base 10 is turned upside down with the fixing plate 6 attached, the force acting on the center of gravity G in the width direction of the fixing plate 6 is centered on the point Q on the center line P2 of the dowel pin 8. The dowel pin 8 is pressed against the inner peripheral surface of the insertion hole 20 of the support base 10 by this moment force, and as a result, the dowel pin 8 does not come out of the insertion hole 20 when turned over. It can be effectively suppressed.

In the above-described embodiment, in the tooth profile model fixing step, the tooth model 4 is fixed to the upper surface of the fixing plate 6 using an adhesive or the like, but instead of such a configuration, the plaster 48 is placed in the injection space 46. After injecting, the tooth profile model 4 may be pressed before the injected plaster 48 is cured, and the tooth model 4 may be fixed to the upper surface of the fixing plate 6 by curing the gypsum 52.

The working model 2 for dental technique (support base 10) thus manufactured has the following features. First, the plurality of insertion holes 20 (specifically, the center line P2 of the insertion hole 20 and the axial center line P2 of the dowel pin 8 attached thereto) are located on a specific side portion (first side) of the support base 10. Since it is disposed on the side of the first engaging protrusion 26), the distance W1 from the first engaging protrusion 26 of the support base 10 to the insertion hole 20 (its center line P2) is the second of the support base 10. It is smaller than the distance W2 from the engagement protrusion 28 to the insertion hole 20 (its center line P2) (W1<W2). Therefore, when cutting the tooth profile model 4 from the specific side of the support base 10, the positioning projection 32 provided on the peripheral side wall 14 of the support base 10 and the corresponding insertion hole 20 (inserted into this). Since the distance between the dowel pin 8) and the dowel pin 8) becomes short, the dowel pin 8 is cut even if a cutting tool (not shown) is cut at a slight inclination when viewed from a specific side of the support base 10. The risk is reduced, and cutting mistakes in the cutting work of the tooth profile model 4 can be greatly reduced.

Further, as described above, the center of gravity G of the fixing plate 6 (plate body 34) in the width direction and the center line P2 of the insertion hole 20 (that is, the center line P2 of the dowel pin 8) are separated from each other in the width direction of the fixing plate. Since it is displaced by D, when the support base 10 is turned upside down with the fixing plate 6 attached, the force acting on the center of gravity G of the fixing plate 6 in the width direction is on the center line P2 of the dowel pin 8. Of the dowel pin 8 is pressed against the inner peripheral surface of the insertion hole 20 of the support base 10 by this moment force, and the dowel pin 8 is inserted when turned over The escape from the hole 20 can be effectively suppressed.

Further, the first engaging projections 26 and the second engaging projections 28 are provided on the support base 10 (support base body 12) side, and the first engagement projections 26 and the second engagement projections 28 are formed on the fixing plate 6 (plate body 34) side. Since the engagement groove 36 and the second engagement groove 38 are provided, when the fixing plate 6 is mounted on the upper surface (support region 18) of the support base 10, the first side of the support base 10 side. The 1st engaging ridge 26 and the 2nd engaging ridge 28, and the 1st engaging ridge 36 and the 2nd engaging ridge 38 on the side of the fixing plate 6 engage with each other in a disengageable manner.

In addition, in relation to the plurality of insertion holes 20 being arranged on the specific side portion side of the support base 10, each insertion hole is formed on the other side portion of the support base 10 (support base body 12). 20 is provided with a plurality of auxiliary engaging ridges 30 and a plurality of auxiliary engaging recesses 40 are provided on the fixing plate 6 (plate body 34) side so as to correspond to these auxiliary engaging ridges 30. When the fixing plate 6 is mounted on the upper surface (supporting region 18) of the support base 10, the plurality of auxiliary engagement protrusions 30 on the support base 10 side and the auxiliary engagement recesses 40 on the fixing plate 6 side. And engage each other.

Therefore, in the state where the fixing plate 6 is mounted on the support base 10, the engagement state between the support base 10 and the fixing plate 6 is reliably maintained, and the backlash of the fixing plate 6 is surely suppressed. Further, even when the tooth profile model 4 is cut and a part of the fixing plate 6 is repeatedly pulled out, the relative backlash and rotation with respect to the support base 10 can be surely suppressed.

<Second Embodiment>
Next, with reference to FIGS. 7 and 8, a second embodiment of the working model for dental technique according to the present invention will be described. In FIG. 7, only the support base of the working model for dental technique of the second embodiment is shown. In the following embodiments, substantially the same members as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the dental work work model 2A (see FIG. 8) of the second embodiment, as can be understood by comparing FIGS. 7 and 8 with FIGS. Modifications have been made to the configuration relating to the auxiliary engagement protrusions 30A and the plurality of auxiliary engagement recesses 40A on the fixing plate 6A side.

In FIG. 6 and FIG. 7, the plurality of auxiliary engagement protrusions 30A on the support base 10A side are the inner surface (specific side portion side) of the second engagement protrusion 28A of the support base 10A (support base body 12A). From a side surface opposite to the first engaging protrusion 26A) and extends linearly toward the first engaging protrusion 26A, and the tip protrusions 62 projecting upward are provided at the tip ends of these. The protrusion 62 is formed, for example, in a substantially rectangular shape.

In the second embodiment, assuming that the heights of the first and second engaging protrusions 26A and 28A are H, the height H1 of the plurality of auxiliary engaging protrusions 30A is, for example, as shown in FIG. The height H of the first and second engaging protrusions 28A is set to a height of about 1/20 to 2/5 (H/20<H1<2H/5), and the height H2 of the tip protrusion 62 (support The height from the upper surface of the upper wall 16A of the base 10A is, for example, about 2H/5 to H of the height H of the first and second engaging protrusions 26A and 28A (2H/5<H1< H).

Also in the second embodiment, the fixing plate 6A has a molding base frame (not shown) attached to the upper end portion of the support base 10A, as in the first embodiment described above. It is formed by pouring gypsum into the pouring space defined in the frame. In connection with this, a plurality of auxiliary engaging recesses 40A are provided on the lower surface of the fixing plate 6A so as to correspond to the plurality of auxiliary engaging protrusions 30A on the support base 10A side. The mating groove 40A extends linearly from the inner side surface (the side surface facing the first engaging groove 36A) of the second engaging groove 38A on the side of the fixing plate 6A toward the first engaging groove 36A. There is. Further, tip recesses 64 are provided at the tips of the plurality of auxiliary engagement recesses 40A so as to correspond to the tip protrusions 62 of the plurality of auxiliary engagement protrusions 30A. Corresponding to the shape of, for example, it is formed in a substantially rectangular shape. The rest of the configuration of the dental technical work model 2A is substantially the same as that of the first embodiment described above.

In the working model 2A for dental technique of the second embodiment, when the fixing plate 6A to which the tooth profile model 4 is fixed is attached to the support region 18A of the support base 10A, it is attached as shown in FIG. In this mounted state, the first engaging protrusions 26A on the specific side of the support base 10A, the second engaging protrusions 28A on the other side, and the first engaging recesses on the fixing plate 6A side. 36A and the second engagement groove 38A engages with each other in a disengageable manner. Further, the plurality of auxiliary engagement ridges 30A on the support base 10A side and the plurality of auxiliary engagement ridges 40A on the fixing plate 6A side are disengageably engaged, and further, the plurality of auxiliary engagement ridges 30A. Of the engaging auxiliary recesses 40A are engaged so as to bite into the distal end recesses 64 of the plurality of engaging auxiliary recesses 40A so as to be engageable and disengageable, whereby the support base and the fixing plate can be engaged more reliably. ..

<Third Embodiment>
Next, with reference to FIG. 9, a third embodiment of the dental work model according to the present invention will be described. In the dental engineering work model 2B of the third embodiment, the configuration relating to the plurality of auxiliary engagement protrusions 30B on the support base 10B side and the plurality of auxiliary engagement recesses 40B on the fixing plate 6B side is adopted. It has been modified.

In FIG. 9, the plurality of auxiliary engagement protrusions 30B on the side of the support base 10B are the inner side surfaces of the second engagement protrusions 28B of the support base 10B (support base body 12B) (first on the specific side portion side). From the side surface facing the engaging protrusion 26B), a linear protrusion linearly extends toward the first engaging protrusion 26B, and the tip protrusions 62B projecting upward are provided at the tip ends of the first engaging protrusions 26B. The upper surface of the protrusion 30B extends downward in a straight line toward the inside (that is, from the second engagement protrusion 28B toward the tip protrusion 62B).

Also in the third embodiment, the fixing plate 6B has a molding base frame (not shown) attached to the upper end portion of the support base 10B in the same manner as in the first embodiment described above. It is formed by injecting gypsum into the base frame. In connection with this, a plurality of auxiliary engaging recesses 40B are provided on the lower surface of the fixing plate 6B in correspondence with the plurality of auxiliary engaging protrusions 30B on the support base 10B side. A tip concave portion 64B is provided at a tip portion of the mating concave groove 40B so as to correspond to a tip protrusion 62B on the support base 10B side, and further, bottom surfaces of the plurality of auxiliary engaging groove portions 40B are directed inward (that is, , Extending from the second engaging groove 38B of the fixing plate 6B toward the tip recess 64B) in a linear manner in the direction of approaching the support base 10B. The rest of the configuration of the dental laboratory work model 2B of the third embodiment is substantially the same as that of the second embodiment described above.

In the dental work model 2B of the third embodiment, a plurality of dowel pins 8 on the fixing plate 6B side are inserted into the insertion holes 20 on the support base 10B side, and are inserted into the support region 18B of the support base 10B. When the fixing plate 6B to which the tooth profile model 4 is fixed is attached, it is attached as shown in FIG. In this mounted state, the first engaging protrusions 26B and the second engaging protrusions 28B on the support base 10B side, and the first engaging recesses 36B and the second engaging recesses 38B on the fixing plate 6B side are provided. Engagingly and disengageably engaging with each other, and the plurality of auxiliary engaging protrusions 30B on the support base 10B side and the plurality of auxiliary engaging recesses 40B on the fixing plate 6B side are disengageably engaged. The tip projections 62B of the plurality of auxiliary engagement projections 30B and the tip recesses 64B of the plurality of engagement auxiliary recesses 40B are disengageably engaged with each other, and the engagement state thereof is the plurality of auxiliary engagement projections 30B. Is in contact with the bottom surfaces of the plurality of auxiliary engagement recesses 40B. Therefore, also in the work model 2B for dental technique of the third embodiment, the same operational effect as that of the second embodiment can be obtained.

In the third embodiment, the tip projections 62B and the inclined surface structure on the side of the plurality of auxiliary engagement projections 30B (therefore, the tip recesses 64B and the inclined surface structure on the side of the plurality of auxiliary engagement recesses 40B). ) Is applied in combination, but instead of such a configuration, an inclined surface structure is provided on the side of the plurality of auxiliary engagement projections 30B (and accordingly, an inclined surface structure is provided on the side of the plurality of auxiliary engagement recesses 40B). You may make it apply only.

<Fourth Embodiment>
Next, with reference to FIG. 10, a fourth embodiment of the dental work model according to the present invention will be described. In the working model for dental technique of the fourth embodiment, the configuration and the support base related to the plurality of auxiliary engagement protrusions 30C on the support base 10C side and the plurality of auxiliary engagement recesses on the fixing plate side. Modifications have been made to the configuration associated with the first engaging projection 26C of 10C. In addition, in FIG. 10, only the support base 10C in the working model for dental technique of the fourth embodiment is shown.

10, in the fourth embodiment, a base-side inclined projection 72 is provided on the inner side surface of the first engagement projection 26C provided on the specific side of the support base 10C, and the base-side inclined projection 72 is provided. The inclined upper surface of the protrusion 72 extends inwardly (i.e., toward the insertion hole 20 side) while inclining downward. The base-side inclined projections 72 are further provided with a plurality of base-side engagement recesses 74 at intervals in the longitudinal direction thereof, and these base-side engagement recesses 74 are formed in the support base main body 12C. It extends to the upper surface of the upper wall 16C.

In the fourth embodiment, the plurality of auxiliary engagement ridges 30C are provided corresponding to the plurality of insertion holes 20 of the support base body 12C, and each auxiliary engagement ridge 30C includes the support base 10C. Linearly extending from the inner side surface of the second engaging protrusion 28C on the other side to the corresponding insertion hole 20, and the tip portion of each auxiliary engaging protrusion 30C has a substantially rectangular tip protrusion. The section 64C is provided. In the fourth embodiment, for example, in comparison with the first embodiment, the number of the auxiliary engaging protrusions 30C is reduced, and thus the width thereof (the horizontal direction in FIG. 10) is reduced. The width) is getting wider.

Also in the fourth embodiment, the fixing plate 6C has a molding base frame (not shown) attached to the upper end portion of the support base 10C in the same manner as in the first embodiment described above. It is formed by injecting gypsum into the base frame. In this regard, although not shown, the lower surface of the fixing plate has the following structure. That is, the first engaging groove is provided on one side of the fixing plate (plate body) corresponding to the first engaging protrusion 26C of the support base 10C (support base body 12C). A second engaging groove is provided on the other side of the fixing plate corresponding to the engaging protrusion 28C. Further, on the lower surface of the fixing plate, a plate-side inclined concave line is provided corresponding to the base-side inclined protrusion 72 on the support base 10C side, and the inclined lower surface of the plate-side inclined concave line is inward. It extends inclining toward the support base 10C side. Further, a plurality of plate-side engaging projections are provided in the plate-side slanting groove corresponding to the plurality of base-side engaging recesses 74 of the supporting base-side slanting projection 72. The engaging protrusions are provided at intervals in the longitudinal direction of the plate-side inclined concave line. Furthermore, on the lower surface of this fixing plate, a plurality of auxiliary engagement ridges corresponding to the plurality of auxiliary engagement ridges 30C on the support base 10C side are provided, and these auxiliary engagement ridges 30C are provided. A tip recess is provided at the tip of the auxiliary engagement recess corresponding to the tip protrusion 64C. The rest of the configuration of the dental technician working model of the fourth embodiment is substantially the same as that of the second embodiment described above.

In the working model for dental technique of the fourth embodiment, the first engaging protrusions 26C (first engaging recesses engaging with the first engaging protrusions) and the plurality of insertion holes are provided on the specific side of the support base 10C. 20 (the dowel pin inserted therein), the base-side inclined projection 72 and the base-side engagement recess 74 (the plate-side inclined recess and the plate-side engagement projection engaged with these) are arranged, and On the other side, the second engagement protrusion 28C (second engagement recess engaged with the second engagement protrusion), the plurality of auxiliary engagement protrusions 30C, and the tip protrusion 64C (the plurality of auxiliary engagement recesses engaged with these). By arranging the ridges and the tip recesses) and arranging in this way, it is possible to reliably suppress relative backlash and rotation with respect to the support base 10 even if the cut tooth profile model 4 is repeated or pulled out.

That is, in a supporting state in which the fixing plate is supported on the upper surface (supporting region 18) of the supporting base 10C (supporting base body 12C), the dowel pins on the fixing plate side are inserted into the insertion holes 20 on the supporting base 10C side. And the first engaging protrusions 26C and the second engaging protrusions 28C on the side of the support base body 12A and the first engaging recesses and the second engaging recesses on the fixing plate (plate body) side. Engage with each other, and the base-side inclined projection 72 and the base-side engagement recess 74 on the support base 10C side and the plate-side inclined recess and plate-side engagement projection on the fixing plate side mutually engage. Engage with. Further, the plurality of auxiliary engagement protrusions 30C and the tip protrusions 64C on the base body 10C side engage with the plurality of auxiliary engagement recesses and the tip recesses on the fixing plate side. Therefore, even with such a configuration, the support base 10C and the fixing plate (not shown) can be engaged with each other as required, and the same effect as described above can be obtained.

It should be noted that the base-side inclined projection 72 and the base-side engagement concave portion 74 on the base main body 10C side applied in the fourth embodiment, the plate-side inclined concave line on the fixing plate side, and the plate-side engagement projection portion. The configuration obtained by combining and can be similarly applied to the dental model work models of the first to third embodiments described above.

<Fifth Embodiment>
Next, with reference to FIGS. 11 to 12, a fifth embodiment of the working model for dental technic according to the present invention will be described. In the embodiments (first to fourth embodiments) shown in FIGS. 1 to 10, the tooth profile model is applied to the partial type, but in the fifth embodiment shown in FIGS. 11 to 12, , The tooth profile model is applied to all jaw type (all jaw/single pin type), that is, to all upper teeth (or all lower teeth).

11 and 12, the support base 10D in the dental work model according to the fifth embodiment includes a substantially semi-elliptical support base body 12D, and the upper end of the outer peripheral portion of the support base body 12D. A substantially U-shaped upper wall 16D is provided in the portion, the upper wall 16D extends in an arc shape, and the upper surface of the upper wall 16D functions as a support region 18D.

As can be understood by comparing FIGS. 11 and 12 with FIGS. 7 and 8 (second embodiment), the support base 10D of the dental laboratory work model of the fifth embodiment is supported. In addition to the configuration of the base 10D (support base body 12D), the configuration related to the first engagement protrusions 26D is modified. More specifically, in connection with the upper wall 16D (support region 18D) of the support base 10D having a substantially U-shape, the first engagement protrusion 26D provided on the specific side portion (outer side portion) thereof is The second engaging protrusion 28D that extends in a substantially U-shaped arc and is provided on the other side portion (inner side portion) also faces the first engaging protrusion 26D and is substantially U-shaped inside thereof. The inner side of the peripheral side wall 14D (specifically, the inner side wall) of the support base 10D is connected by a substantially semi-elliptical connecting wall 82.

Further, the plurality of insertion holes 20 (specifically, the center line P2) of the support base 10D (support base body 12D) are provided on the upper surface of the upper wall 16D of the support base 10D (support base body 12D). That is, the support region 18D is arranged on the specific side (that is, the first engagement protrusion 26D) side with respect to the center line P1 (see FIG. 12) in the width direction. These insertion holes 20 are arranged along the upper surface (support area 18D) of the upper wall 16D of the support base body 12D at arc-shaped intervals, and the width of the upper surface (support area 18D) of this upper wall 16D is W. Then, as described above, the distance W1 from the specific side end to the insertion hole 20 (distance to the center line P2 of the insertion hole 20) is (W/5)<W1<(W/2) The range is set to preferably W/4<W1<2W/5).

Further, a base-side inclined projection 72D is provided on the inner side surface of the first engagement protrusion 26D of the support base 10D, as in the fourth embodiment of FIG. The inclined upper surface of 72D extends obliquely downward toward the inner side (that is, the insertion hole 20 side). The base-side inclined projection 72D is further provided with a plurality of base-side engagement recesses 74D at intervals along the longitudinal direction thereof.

In the fifth embodiment, further, a plurality of auxiliary engagement protrusions 30D are provided at intervals on the inner surface of the two engagement protrusions 28D on the other side of the support base body 12D. .. These auxiliary engagement ridges 30D linearly extend toward the specific side of the support base 10D (that is, the side of the first engagement ridges 26D), and their tip ends project upward. Projections 62D are provided, and these tip projections 62D are located on the center line P1 in the width direction of the support region 18D (see FIG. 12).

Since this embodiment is applied to a full-jaw type tooth profile model, 14 insertion holes 20 (in other words, dowel pins to be used) are provided along this support region 18D, and as shown in FIG. The distance between the insertion holes 20 (that is, the distance between the dowel pins) is increased toward both ends of the upper wall 16D (that is, the support region 18D) of the base body 12D.

In this regard, in this embodiment, the auxiliary engagement protrusions 30D are provided so that the tip protrusions 62D of the plurality of auxiliary engagement protrusions 30D are substantially evenly spaced, and the adjacent insertion holes 20 are provided. Between the center lines P2 (specifically, between the center lines P2 (see FIG. 12) of the adjacent insertion holes 20), for example, 1.5 to 5 auxiliary engagement protrusions 30D are arranged. Then, for example, about 1.5 to 3 pieces are provided in the central portion in the longitudinal direction of the support base 10D (support region 18D) and the vicinity thereof in which the interval between the adjacent insertion holes 20 is small, and between the adjacent insertion holes 20. The support base 10D (support region 18D) having a large interval is provided with about 2 to 5 pieces at both ends and in the vicinity thereof, and the end portions and the vicinity thereof are provided more than the central portion and the vicinity thereof.

In the dental laboratory work model of the fifth embodiment, the fixing plate (not shown) is formed on the upper end portion of the support base 10D in the same manner as in the first embodiment described above. (Not shown) is attached (specifically, the outer side of the molding base frame is attached so as to abut on the positioning projection 32, and the inner side thereof is attached so as to abut on the connecting wall 82). It is formed by injecting plaster into the interior.

For this reason, when the structure of the support base 10D is as described above, the lower surface of the fixing plate corresponding to the upper surface of the support base 10D is not shown in the drawings. Will be configured. That is, the first engaging groove is provided on one side of the fixing plate (plate body) corresponding to the first engaging protrusion 26D on the specific side of the support base 10D (support base body 12D). Then, a second engaging groove is provided on the other side portion of the fixing plate corresponding to the second engaging protrusion 28D. In addition, a plate-side inclined concave line is provided on the lower surface of the fixing plate corresponding to the base-side inclined protrusion 72D on the support base 10D side, and the plate-side inclined concave line includes the support base side. A plurality of plate side engagement protrusions are provided corresponding to the plurality of base side engagement recesses 74D of the inclined protrusion 72D.

Further, a plurality of auxiliary engaging recesses are provided on the lower surface of the fixing plate in correspondence with the plurality of auxiliary engaging protrusions 30D on the support base 10D side, and these auxiliary engaging recesses are the fixing plates. Extending linearly from the inner surface of the second engaging groove on the side toward the first engaging groove, and the tip projections of the plurality of auxiliary engaging projections 30D are provided at the tips of these auxiliary engaging grooves. The tip concave portion is provided corresponding to 62D, and the other configuration of this working model for dental technique is substantially the same as that of the first embodiment described above.

In the dental technician work model of the fifth embodiment, a plurality of dowel pins on the fixing plate side are inserted into a plurality of insertion holes 20 on the supporting base 10D side to fix the fixing plate to the supporting area 18 of the supporting base 10D. By attaching (not shown), as can be understood from the above description, the first engaging protrusion 26D on the specific side of the support base 10D and the second engaging protrusion 28D on the other side of the supporting base 10D. The first engaging groove and the second engaging groove on the fixing plate engage with each other in a disengageable manner, and the base-side inclined protrusion 72D and the base-side engaging recess 74D on the support base 10D side. The plate-side inclined groove and the plate-side engaging protrusion on the fixing plate engage with each other. Further, the plurality of auxiliary engagement projections 30D and the tip projections 62D on the support base 10D side and the plurality of auxiliary engagement recesses and the tip recesses on the fixing plate side are engageably and disengageably engaged. Similarly to the above, the support base 10D and the fixing plate can be engaged more reliably.

<Sixth Embodiment>
Next, with reference to FIG. 13, a sixth embodiment of the working model for dental technique according to the present invention will be described. In this sixth embodiment, as can be understood by comparing FIG. 13 with FIGS. 7 and 8, the tooth profile model is a partial type and the dowel pins are arranged in two rows (so-called). , Partial teeth/double pin type).

In FIG. 13, in the support base 10E of the working model for dental technique of the sixth embodiment, a plurality of insertion holes 20E are provided in two rows in the support region 18E of the support base body 12E. That is, the plurality of insertion holes 20E are the plurality of first insertion holes 20Ea arranged on the specific side portion side (the first engagement protrusion 26E side) of the support base body 12E, and these first insertion holes 20Ea. It is composed of a plurality of second insertion holes 20Eb arranged on the inner side (on the side of the second engagement protrusion 28E).

In the sixth embodiment, the inner diameters of the plurality of first insertion holes 20Ea are larger than those of the plurality of second insertion holes 20Eb, so that the first dowel pins (not shown) inserted into the first insertion holes 20Ea are external. A large diameter is used, and a second dowel pin (not shown) inserted into the second insertion hole 20Eb has a small outer diameter. Instead of such a configuration, the outer diameters of the plurality of first and second insertion holes 20Ea, 20Eb may be increased, and the first and second dowel pins having a large outer diameter may be used. Alternatively, the outer diameters of the plurality of first and second insertion holes 20Ea and 20Eb may be reduced so that the first and second dowel pins having smaller outer diameters may be used, which is applicable to the sixth embodiment. In this case, it is preferable to use the first and second dowel pins having a small outer diameter.

In the sixth embodiment, the plurality of insertion holes 20E (first and second insertion holes 20Ea, 20Eb) are also located on the specific side side with respect to the center line P1 in the width direction of the support region 18E of the support base 10E. It is disposed on the (first engagement protrusion 26E side). Specifically, the whole of the plurality of first and second insertion holes 20Ea, 20Eb is arranged on the specific side portion side (the first engaging protrusion 26E side) of the support base 10E with respect to the center line P1. However, by disposing the whole of the plurality of first insertion holes 20Ea and the center lines of the plurality of second insertion holes 20Eb on the specific side portion side of the support base 10E with respect to the center line P1, the above-described desired effect is obtained. In the case of this double pin type, the entire center lines of the plurality of first insertion holes 20Ea and the plurality of second insertion holes 20Eb are arranged on the specific side portion side relative to the center line P1 in the width direction. Is said to be done.

Further, in the sixth embodiment, similarly to the fourth embodiment of FIG. 10, the base side inclined projection 72E is formed on the inner side surface of the first engaging projection 26E on the specific side of the support base 10E. The base-side inclined projections 72E are provided with a plurality of base-side engagement recesses 74E at intervals in the longitudinal direction. Further, a plurality of auxiliary engagement protrusions 30E are provided on the other side portion (on the side of the second engagement protrusion 28E) of the support region 18E of the support base 10E, and these auxiliary engagement protrusions 30E are provided on the support base 10E. Linearly extending from the inner side surface of the second engaging projection 28E toward the first engaging projection 26E, and the tip ends of these auxiliary engaging projections 30E have substantially rectangular tip projections 62E. Is provided.

In the sixth embodiment, the dowel pins (first and second dowel pins), the first engagement protrusions 26E, the base-side inclined protrusions 72E, and the base-side engagement recesses are provided on the specific side of the support base 10E. Since 74E is provided, the engagement state with the plate for solids, which will be described later, is less rattled. However, when such an engagement state with less rattling can be maintained, the base side inclined projection 72E and the base side engagement recess 74E can be omitted.

Also in the sixth embodiment, as in the first embodiment described above, the fixing plate has a molding base frame (not shown) attached to the upper end portion of the support base 10E, and the molding base is It is formed by injecting plaster into the frame. In this regard, although not shown, the lower surface of the fixing plate has the following configuration. That is, the first engaging recessed line is provided on one side portion of the fixing plate (plate body) corresponding to the first engaging protruding line 26E of the support base 10E (supporting base body 12E). A second engaging groove is provided on the other side of the fixing plate corresponding to the engaging protrusion 28E. In addition, a plate-side inclined concave line is provided on the lower surface of the fixing plate in correspondence with the base-side inclined protrusion 72E on the support base 10E side, and the plate-side inclined concave line has a support base 10E. A plurality of plate side engaging projections are provided corresponding to the plurality of base side engaging concave portions 74E. Furthermore, on the lower surface of this fixing plate, a plurality of auxiliary engagement ridges are provided corresponding to the plurality of auxiliary engagement ridges 30E on the support base 10E side, and these auxiliary engagement ridges 30E are provided. A tip recess is provided at the tip of the auxiliary engagement recess corresponding to the tip projection 62E. The other configurations of the working model for dental technique of the sixth embodiment are substantially the same as those of the second embodiment described above.

In the dental engineering work model of the sixth embodiment, the dowel pins (first and second dowel pins) on the fixing plate side are inserted into the insertion holes 20E (first and second insertion holes 20Ea, 20Eb) on the support base 10E side. ) To attach the fixing plate having the tooth model fixed to the support region 18E of the support base 10E, the first side on the specific side of the support base 10E can be easily understood from the above description. The engaging ridge 26E and the second engaging ridge 28E on the side of the other side and the first engaging groove and the second engaging groove on the fixing plate side are detachably engaged with each other. The base-side inclined protrusion 72E and the base-side engaging recess 74E are engaged with the plate-side inclined recess on the fixing plate side and the plate-side engaging protrusion in a disengageable manner. Further, the plurality of auxiliary engagement projections 30E on the support base 10E side and the tip projections 62E thereof and the plurality of auxiliary engagement recesses on the fixing plate side and their tip recesses are engaged with each other in a disengageable manner. As a result, similarly to the above-described embodiment, the support base 10E and the fixing plate can be engaged more reliably.

<Seventh Embodiment>
Next, with reference to FIG. 14, a seventh embodiment of the dental work model according to the present invention will be described. In this seventh embodiment, as understood by comparing FIGS. 14 and 10 (fourth embodiment) and FIGS. 11 to 12 (fifth embodiment), the tooth profile model is a full-jaw type. The present invention is applied to those in which dowel pins are arranged in two rows (so-called full-jaw/double-pin type).

In FIG. 14, in the support base 10E of the working model for dental technique of the seventh embodiment, a plurality of insertion holes 20F are provided in two rows in the support region 18F of the support base body 12F. That is, the plurality of insertion holes 20E are the plurality of first insertion holes 20Fa arranged on the specific side portion (the side of the first engaging protrusion 26F) of the support base body 12F, and the first insertion holes 20Fa. It is composed of a plurality of second insertion holes 20Fb arranged on the inner side (on the side of the second engaging protrusion 28F). In the seventh embodiment, the inner diameters of the plurality of first insertion holes 20Fa are equal to the inner diameters of the plurality of second insertion holes 20Fb, and therefore the first and second insertion holes 20Fa and 20Fb are inserted. The same first and second dowel pins (not shown) are used.

In the seventh embodiment, the plurality of insertion holes 20F (first and second insertion holes 20Fa, 20Fb) are located closer to the specific side (the first side than the center line P1 in the width direction of the support region 18F of the support base 10F). 1 engaging projection 26F side). Specifically, the whole of the plurality of first and second insertion holes 20Fa and 20Fb is arranged on the specific side portion side (the first engaging protrusion 26F side) of the support base 10F with respect to the center line P1. ..

In addition, in the seventh embodiment, similarly to the fourth embodiment of FIG. 10, the auxiliary engagement protrusions are provided corresponding to each of the plurality of insertion holes 20F (first and second insertion holes 20Fa, 20Fb). 30F are provided, and these auxiliary engagement protrusions 30F are directed toward the corresponding insertion holes 20F (first and second insertion holes 30Fa, 30Fb) from the inner side surface of the second engagement protrusions 28F of the support base 10F. A substantially rectangular tip projection 62F is provided at the tip of each of the auxiliary engagement ridges 30F extending in a straight line.

In this seventh embodiment, since it is applied to a full-jaw type tooth profile model, the insertion holes 20F (the pair of first and second insertion holes 20Fa, 20Fb) have 14 sets along the support region 18F. Similar to the fifth embodiment shown in FIGS. 11 and 2, the insertion holes 20F (first and second insertion holes) are located closer to both ends of the upper wall 16F (that is, the support region 18F) of the support base body 12F. The distance between 20Fa and 20Fb) (that is, the distance between the first and second dowel pins inserted into the first and second insertion holes 20Fa and 20Fb) is large.

In this regard, as shown in FIG. 14, in the seventh embodiment, the widths of the plurality of auxiliary engagement protrusions 30F are different from each other, and the auxiliary engagement protrusions 30F are provided at both ends of the support region 18F and in the vicinity thereof. The width of the auxiliary engaging ridge 30F located is large, and the width of the auxiliary engaging ridge 30F located in the central portion and in the vicinity thereof is small. Note that, instead of such a configuration, the widths of the plurality of auxiliary engagement protrusions 30F may all be the same.

Also in the seventh embodiment, as in the first embodiment described above, the fixing plate has a molding base frame (not shown) attached to the upper end portion of the support base 10F. It is formed by injecting plaster into the frame. In this regard, although not shown, the lower surface of the fixing plate has the following structure. That is, the first engaging groove is provided on one side of the fixing plate (plate body) corresponding to the first engaging protrusion 26F of the support base 10F (support base body 12F), and the second A second engaging groove is provided on the other side of the fixing plate corresponding to the engaging protrusion 28F. In addition, a plurality of auxiliary engaging ridges corresponding to the plurality of auxiliary engaging ridges 30F on the support base 10F side are provided on the lower surface of the fixing plate, and the tips of these auxiliary engaging ridges 30F are provided. A tip recess is provided at the tip of the auxiliary engagement recess corresponding to the protrusion 62F. The other configurations of the working model for dental technique of the seventh embodiment are substantially the same as those of the above-described fourth embodiment.

In the dental work model of the seventh embodiment, the dowel pins (first and second dowel pins) on the fixing plate side are inserted into the insertion holes 20F (first and second insertion holes 20Fa, 20Fb) on the support base 10F side. ), the fixing plate having the tooth model fixed thereto is attached to the support area 18F of the support base 10F, and as will be easily understood from the above description, the first side on the specific side portion of the support base 10F. The engagement protrusion 26F and the second engagement protrusion 28F on the other side portion, and the first engagement recess and the second engagement recess on the fixing plate side are disengageably engaged with each other. Further, the plurality of auxiliary engagement protrusions 30F on the support base 10F side and the tip protrusions 62F thereof and the plurality of auxiliary engagement recesses on the fixing plate side and their tip recesses are engaged with each other in a disengageable manner. As a result, similarly to the above-described embodiment, the support base 10F and the fixing plate can be engaged more reliably.

Although various embodiments of the dental work work model according to the present invention have been described above, the present invention is not limited to such embodiments, and various modifications and corrections can be made without departing from the scope of the present invention. is there.

For example, in the case of the double pin type shown in FIGS. 13 and 14, since the support base and the fixing plate can be securely engaged and held by the two rows of dowel pins (a plurality of first and second dowel pins), As shown in FIG. 14 (seventh embodiment), the base-side inclined protrusions on the first engagement protrusion side of the support base, the plurality of base-side engagement recesses, and the first engagement of the fixing plate. The plate-side inclined groove on the groove side and the plurality of plate-side engaging projections can be omitted. However, when these are omitted, FIG. 13 (sixth embodiment) and FIG. 14 (seventh embodiment) ), it is possible to shift a plurality of insertion holes (a plurality of "first and second insertion holes") to a specific side of the support base, and to specify these insertion holes. A larger effect can be obtained by shifting to the side.

2,2A,2B Work model for dental technique 4 Tooth profile model 6,6A,6B Fixing plate 8 Dowel pin 10,10A,10B,10C,10D,10E,10F Support base 12,12A,12B,12C,12D,12E , 12F support base body 18, 10 (, 18B, 18D, 18E, 18F support area 20, 20E, 20F insertion hole 26, 26A, 26B, 26C, 26D, 26E, 26F first engaging projection 28, 28A, 28B, 28C, 28D, 28E, 28F 2nd engaging ridges 30, 30A, 30B, 30C, 30D, 30E, 30F Auxiliary engaging ridges 36, 36A, 36B 1st engaging recess 38, 38A, 38B 2 engaging groove 40, 40A, 40B auxiliary engaging groove 62, 62B, 62C, 62D, 62E, 62F tip projection 64, 64B tip recess

Claims (10)

A working model for dental technician comprising a fixing plate to which a tooth profile model is fixed, a plurality of dowel pins implanted in the fixing plate, and a support base for supporting the fixing plate. ,
The support region provided on the upper surface of the support base is provided with a plurality of insertion holes into which the plurality of dowel pins are inserted, and the plurality of insertion holes are formed in a width direction of the support region of the support base. It is located on the specific side from the center line,
Further, the specific side portion of the support region of the support base and the other side portion facing the specific side portion are provided with a first engagement protrusion and a second engagement protrusion that protrude upward. A plurality of auxiliary engagement ridges extending toward the specific side portion are provided on an inner surface of the second engagement ridge, and the plurality of auxiliary engagement ridges are provided between adjacent insertion holes. .5 to 5 are provided,
A first engaging groove and a second engaging groove are provided on the lower surface of the fixing plate in correspondence with the first engaging ridge and the second engaging ridge of the support region. In addition, a plurality of auxiliary engaging recesses are provided corresponding to the plurality of auxiliary engaging protrusions of the support area, and a working model for dental technique. Each of the tip ends of the plurality of auxiliary engagement protrusions on the support base side is provided with a tip protrusion that protrudes upward, and the tips of the plurality of auxiliary engagement recesses on the fixing plate side. The dental model working model according to claim 1, wherein each of the portions is provided with a tip recess corresponding to the tip projection on the support base side. The tip ends of the plurality of auxiliary engagement ridges on the support base side extend to the specific side portion to the center line in the width direction of the support region or beyond the center line, and The dentistry according to claim 1 or 2, wherein the plurality of auxiliary engagement concave lines on the fixing plate side extend to a center line in the width direction of the fixing plate or beyond the center line. Working model for technicians. A pedestal-side sloping projection extending downwardly and inwardly is provided on an inner surface of the first engagement projection of the support pedestal, and the base-side sloping projection is provided with the base. A plurality of base-side engaging recesses are provided at intervals along the base-side inclined protrusion, and the lower surface of the fixing plate is directed inwardly in correspondence with the base-side inclined protrusion. A plate-side inclined groove extending obliquely toward the support base side is provided, and the plate-side inclined groove has a plurality of plate-side engaging protrusions spaced from each other along the plate-side inclined groove. It is provided, The working model for dental technicians in any one of Claims 1-3. The upper surface of the plurality of auxiliary engagement protrusions on the support base side is provided with a base-side inclined surface that extends obliquely downward toward the inside, and the plurality of auxiliary engagement recesses on the fixed plate side are provided. The work model for dental technician according to any one of claims 1 to 4, wherein the bottom surface of the strip is provided with a plate-side inclined surface that extends inwardly and inclines toward the support base side. .. The tooth profile model is a full-jaw type, and correspondingly, the fixing plate and the supporting regions of the supporting base respectively extend in an arc shape, and between adjacent insertion holes at both ends of the supporting region. The dentistry according to claim 1, wherein the number of the auxiliary engagement ridges provided is larger than the number of the auxiliary engagement ridges provided between the adjacent insertion holes in the central portion of the support region. Working model for technicians. The tooth profile model is a partial type, and correspondingly, the fixing plate and the support region of the support base are formed horizontally, and the plurality of auxiliary engagement ridges are formed in the support region. The work model for dental technician according to claim 1, wherein 3 to 5 pieces are provided between the adjacent insertion holes in. A working model for dental technician comprising a fixing plate to which a tooth profile model is fixed, a plurality of dowel pins implanted in the fixing plate, and a support base for supporting the fixing plate. ,
The support region provided on the upper surface of the support base is provided with a plurality of insertion holes into which the plurality of dowel pins are inserted, and the plurality of insertion holes are formed in a width direction of the support region of the support base. It is located on the specific side of the center line,
Further, the specific side portion of the support region of the support base and the other side portion facing the specific side portion are provided with a first engagement protrusion and a second engagement protrusion that protrude upward. A plurality of auxiliary engagement ridges extending toward the specific side portion are provided on the inner side surface of the second engagement ridge, and each of the tip ends of the plurality of auxiliary engagement ridges is provided with an upward direction. A protruding tip is provided,
A first engaging groove and a second engaging groove are provided on the lower surface of the fixing plate in correspondence with the first engaging ridge and the second engaging ridge of the support region. In addition, a plurality of auxiliary engagement ridges are provided corresponding to the plurality of auxiliary engagement ridges in the support area, and the support base is provided at each of the tip end portions of the plurality of auxiliary engagement ridges. A working model for dental technician, characterized in that a tip recess is provided corresponding to the tip projection on the table side. Each of the plurality of auxiliary engagement ridges on the support base side is provided with one or more intermediate ridges at a longitudinal intermediate portion thereof, and the plurality of auxiliary lugs on the fixed plate side. 9. The working model for dental technician according to claim 8, wherein each of the recessed grooves has an intermediate recess corresponding to an intermediate protrusion of the plurality of auxiliary engagement protrusions. A working model for dental technician comprising a fixing plate to which a tooth profile model is fixed, a plurality of dowel pins implanted in the fixing plate, and a support base for supporting the fixing plate. ,
The support region provided on the upper surface of the support base is provided with a plurality of insertion holes into which the plurality of dowel pins are inserted, and the plurality of insertion holes are formed in a width direction of the support region of the support base. It is located on the specific side from the center line,
Further, the specific side portion of the support region of the support base and the other side portion facing the specific side portion are provided with a first engagement protrusion and a second engagement protrusion that protrude upward. A plurality of auxiliary engagement ridges extending toward the specific side portion are provided on an inner surface of the second engagement ridge, and tip ends of the plurality of auxiliary engagement ridges are formed in the support region. Extends to the specific side portion side to the center line in the width direction or beyond the center line,
A first engaging groove and a second engaging groove are provided on the lower surface of the fixing plate in correspondence with the first engaging ridge and the second engaging ridge of the support region. In addition, a plurality of auxiliary engagement ridges are provided corresponding to the plurality of auxiliary engagement ridges of the support region, and the plurality of auxiliary engagement ridges are formed in the center of the fixing plate in the width direction. A working model for dental technician, which extends to a line or beyond the central line.

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