JP3118467U - Working model fixing set for dental technician - Google Patents

Abstract

The present invention provides a technique capable of easily fixing a work model to an articulator without using gypsum and performing a dental technician work smoothly.
A dimple 12a is provided at two opposing positions on the side surface of a base part 12 of a work model 10 comprising a tooth mold part 11 and a base part 12. The mounting fixture 20 is formed from an upper plate and a lower plate by sandwiching the articulator 30 from above and below, and the support portion 31a of the articulator 30 is sandwiched from above and below to be mounted on the articulator 30. The upper plate is provided with an L-shaped piece 21a and a gate portion 21b, and the insertion piece 22c is connected to the lower plate via a flexible portion 22b. The work model 10 can be easily and firmly fixed to the articulator 30 by inserting the L-shaped piece 21a into the dimple 12a and the insertion piece 22c into the other dimple 12a through the hollow portion of the gate portion 21b. Moreover, since the fixing tool 20 does not cover the tooth mold portion 11, it does not interfere with the dental technical work.
[Selection] Figure 5

Description

  The present invention relates to a fixture mounted on an articulator, a work model fixed to the articulator via the fixture, and a work model fixing set including the fixture and the work model.

  FIG. 6 shows an example of a conventional articulator 30. The articulator 30 includes a base 31 and an arm 32. The base includes a U-shaped support portion 31a and support columns 31b that stand up from both ends. The U-shaped arm 32 includes: It is rotatably connected to the upper end of the column 31b via a pin. In addition, a spring for adjusting occlusion is provided in the middle of the column 31b.

  Such an articulator (Nanka University articulator) 30 has a simple structure, is strong, and is inexpensive, so that it is particularly frequently used.

  When the articulator 30 is used, as shown in FIG. 7, the work model 10 including the tooth profile portion 11 and the base portion 12 is fixed to the support portion 31 a of the base 31, and the counter tooth model 40 is attached to the arm 32. Is fixed, and the arm 32 is rotated so that the engagement of the work model 10 can be performed while watching the meshing appropriately.

  In this case, as shown in the drawing, conventionally, the work model 10 is fixed to the articulator 30 by hardening the base portion 12 of the work model 10 and the support portion 31a of the articulator 30 with a plaster 50. Such work is time consuming and wasteful because it requires gypsum each time the articulator 10 is used. Further, it is very troublesome to remove the work model 10, and it is also difficult to remove the plaster adhering to the articulator 30 and the work model 10.

  In order to solve the above-described problem, Patent Document 1 discloses a U-shaped fixture having a U-shape in plan view, which includes a substrate that engages with a support portion of an articulator and elastic pressing plates that extend substantially vertically from both ends of the substrate. A technique for mounting and fixing a work model with a pressing plate of the fixture is disclosed. If such a fixing tool is used, there is no waste because no gypsum is required, and the fixing work can be easily performed, so that it does not take time and effort.

However, when the work model is sandwiched between the pressing plates of the fixture as described above, the pressing plate covers the side surface of the tooth mold portion of the working model, and thus there is a problem that obstructs the dental technical work. In addition, when the work model is not fixed firmly by pinching, if the work model or the articulator is subjected to an impact, the work model may be displaced from the initial fixing position, which may hinder the confirmation of the occlusal state. .
Utility Model Registration No. 310569

  Accordingly, an object of the present invention is to provide a technique that can easily fix the work model to the articulator without using plaster and can smoothly perform the dental work.

  In order to solve the above-described problems, the present invention provides a working model fixing set including a dental technician working model and a fixture that is attached to an articulator and fixes the working model to the articulator. Because the base has a dimple on the base, and the fixture has a substrate having means for attaching to the articulator, and an insertion fixing means for inserting and fixing the dimple of the work model. is there.

  Thus, the work model can be easily fixed to the articulator without using gypsum by inserting the insertion fixing means of the fixture attached to the articulator into the dimple of the work model. Because it is fixed by insertion, there is no worry that the fixing position will shift even if an impact is applied from the outside. Furthermore, since the dimples are provided on the side surface of the base portion, the insertion fixing means of the fixing tool does not cover the tooth mold portion, so that it does not interfere with the dental technical work.

  The fixture substrate is divided into a pair of upper and lower plates, one or both of which are provided with claws, the other or both are provided with slits, and the support or arm of the base of the articulator is viewed from above and below. When the nail is engaged with the slit, the fixture can be easily attached to the articulator. Moreover, it is robust because of its simple structure.

  When the substrate is formed into a donut shape in plan view corresponding to the support portion of the base of the articulator having a U-shape in plan view, when the fixture is attached to the articulator, the lower side of the articulator Since the finger can be put in and the work model can be touched directly, the fixture does not interfere with dental work.

  The dimples of the work model are provided at two opposing positions on the side of the base portion, and it is easy to fix at these two locations, and the fixing is difficult to be released. Correspondingly, the fixture includes an L-shaped piece extending upward from the upper surface of the substrate and having a bent upper end, a gate portion extending upward from the upper surface of the substrate and having a gap at the center, and a flexible portion. The insertion piece connected to the substrate is inserted, an L-shaped piece is inserted into one of the dimples, and the insertion piece is inserted through the hollow portion of the gate portion into the other of the dimples. Can be firmly fixed.

  When the pin is fixed to the tooth mold part of the work model, the insertion hole for inserting the pin is provided in the base part, the recess is provided in the back of the base part, and the tip of the pin is exposed when the pin is inserted into the insertion hole. Then, when the tip of the pin is pushed from the back surface of the base portion, the tooth block is lifted from the base portion, so that it can be easily removed and the efficiency of the dental technician work is increased.

  Since the working model fixing set according to the present invention is configured as described above, it is possible to easily fix the working model to the articulator without using gypsum, and to smoothly perform the dental technical work. Play.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the dental technician work model 10 according to this device will be described. As shown in FIG. 1A, the working model 10 includes a tooth mold portion 11 shaped like a patient's tooth mold and a base section 12 that supports the tooth mold section 11. As shown in the figure, the back surface of the tooth mold portion 11 is formed flat, and holes are formed at appropriate intervals, and dowel pins 11a are press-fitted and bonded to the holes. Then, as shown in FIG. 1 (b), both sides of the tooth to be subjected to the technical work for manufacturing the restoration of the crown, etc. are cut with a plaster saw, the tooth block 11b is cut out, and the other part of the tooth mold portion 11 is cut. Can be separated from

  Further, as shown in FIG. 1A, the base portion 12 has a shape of a ball in a plan view, and the front and back surfaces are formed substantially flat. Two dimples 12a are provided opposite to each other at both end portions of the side surface of the base portion 12 in the longitudinal direction. Further, the back surface of the base portion 12 is recessed except for the outer edge, and forms a recess 12b. Further, a hole for inserting the above-described dowel pin 11 a of the work model 11 is provided through the front and back surfaces of the base portion 12.

  When the working model 10 is formed as described above and the tooth mold part 11 and the base part 12 are joined, the tip of the dowel pin 11a of the tooth mold part 11 is recessed on the back surface of the base part 12 as shown in FIG. It is exposed from the location 12b. Therefore, even when the plaster is solidified when the base portion 12 is manufactured and the tooth mold portion 11 and the base portion 12 are fixed, the tip of the dowel pin 11a is inserted into the recess 12b of the base portion 12 as shown in the figure. When a finger is inserted and pushed, the tooth block 11b that is the subject of the technical work rises and can be easily removed.

  In order to manufacture this working model 10, a forming frame 13 made of a bottom wall and a peripheral wall rising from the periphery of the bottom wall as shown in FIG. As shown in the drawing, a portion surrounded by the bottom wall and the peripheral wall forms a molding depression 13a having a plan view-tilt shape. Then, a plate-like insole 14 made of a porous material such as foamed polystyrene, which has a shape similar to that of the molding recess 13a and is slightly smaller in size, is laid on the bottom of the molding recess 13a, and then gypsum is formed in the molding recess 13a. A paste is injected, and a dowel pin 11a of a separately manufactured tooth mold portion 11 having a dowel pin 11a press-fitted and bonded to the back surface is pushed into the paste. When the gypsum paste is hardened and taken out from the molding frame 13, a base portion 12 made of gypsum is formed, and the dowel pins 11 a of the tooth mold portion 11 are inserted into the base portion 12, thereby penetrating the front and back surfaces. A hole is formed.

  Further, as shown in FIG. 3, the side surface of the molding recess 13 a of the molding frame 13 is provided with convex portions 13 b facing the two ends at both ends in the longitudinal direction toward the inside. Dimples 12a are formed at both ends in the direction. Since the bottom of the insole 14 is raised, the recess 12 b is formed on the back surface of the base portion 12. Since the insole 14 is formed of a porous material, the dowel pin 11a penetrates and hits the bottom wall of the molding frame 13 as shown in the figure. It doesn't float from 12. In addition, an annular rib substantially corresponding to the contour of the insole 14 is provided on the bottom surface of the molding recess 13a so that the position of the insole 14 is not shifted during the injection of the gypsum paste. It ’s a good idea to fit it.

  Next, the fixture 20 according to this device will be described. As shown in FIG. 4, the fixture 20 includes an upper plate 21 and a lower plate 22 formed in a pair of planar donut shapes. The upper plate 21 and the lower plate 22 are formed so as to be hollow when overlapped. That is, as shown in the figure, the upper plate 21 is generally flat as a whole, but its peripheral edge hangs downward and the lower plate 22 is generally flat as a whole, but its peripheral edge stands upward. Therefore, when the upper plate 21 and the lower plate 22 are overlapped with each other, the periphery of the upper plate 21 and the lower plate 22 come into contact with each other, so that it becomes hollow.

  As shown in the drawing, an L-shaped piece 21a extends upward from the front portion of the upper plate 21, and a hollow gate portion 21b extends upward from the rear portion of the upper plate 21. A plurality of claws 21 c are provided at the lower end of the peripheral edge of the upper plate 21. Further, as shown in the drawing, a slit 22a is provided at a position corresponding to the claw 21c at the upper end of the peripheral edge of the lower plate 22, and a flexible portion 22b made of an elastic material is provided at the rear portion of the lower plate 22. And the insertion piece 22c is connected. Since the fixture 20 is made of a soft synthetic resin, the flexible portion 22b is formed by reducing the thickness.

  When such a fixture 20 is attached to the above-described articulator (Nanka University articulator) 30, as shown in the drawing, the support 31a of the base 31 of the articulator 30 is moved from above and below to the upper plate 21 and the lower plate 21. It is sandwiched between the plates 22. When pressing from above and below in this state, the upper plate 21 and the lower plate 22 are integrated by engaging the claw 21c of the upper plate 21 with the slit 22a of the lower plate 22, and at the same time, the fixture 20 is attached to the articulator 30. Installed.

  Thus, as shown in FIG. 5A, the following procedure is followed to fix the work model 10 to the articulator 30 to which the fixture 20 is mounted.

That is, first, as shown in FIG. 5B, the work model 10 is inclined to the front side of the articulator 30, and the tip of the L-shaped piece 21 a of the fixture 20 is placed on one dimple 12 a provided on the base portion 12. Plug in.
Next, as shown in FIG. 5C, the work model 10 is inclined toward the rear side of the articulator 30, and the back surface of the base 12 of the work model 10 is brought into contact with the upper plate 21 of the fixture 20. At the same time, the flexible portion 22b is bent, and the insertion piece 22c is passed through the hollow portion of the gate portion 21b of the fixture 20 and inserted into the other dimple 12a.
In this way, the work model 10 is simply fixed to the articulator 30 as shown in FIG. In this case, since the L-shaped piece 21a and the insertion piece 22c are inserted into the dimple 12a, the fixing position of the work model 10 does not change even when an impact is applied from the outside. Moreover, in the fixed state as shown in the figure, the tooth mold part 11 of the work model 10 is completely exposed, so that the fixture 20 does not hinder the dental technical work.

  In the above-described embodiment, the L-shaped piece 21a and the insertion piece 22c are used as means for fixing the work model 10 of the fixing tool 20. However, the present invention is not limited thereto, and is fixed by being inserted into the dimple 12a of the work model 10. Any means of doing can be employed.

  For example, a peripheral wall rising from the peripheral edge is provided on the upper surface of the fixture, and the base portion 12 of the work model 10 enters a recess surrounded by the upper surface and the peripheral wall, and a screw hole is provided in the peripheral wall, and a bolt is provided in the screw hole. And the work model 10 is fixed by inserting the tip of the bolt into the dimple 12a of the base portion 11 by screwing the bolt.

  As another example, instead of bolts and screw holes, a wedge and an insertion hole into which a wedge tip provided on the peripheral wall is inserted are used to drive the wedge into the insertion hole, and the wedge tip becomes the base portion 11. Some work models 10 are fixed by being inserted into the dimples 12a.

  As another example, there is a type in which an insertion piece is engaged with a ratchet type in an insertion hole provided in a peripheral wall, and the insertion piece is inserted into the dimple 12a and fixed by advancing and retreating the insertion piece. .

  As another example, an elastic member such as a leaf spring is provided so as to protrude from the peripheral wall, and the elastic member is fitted into the dimple 12a of the base portion 12 to fix the work model 10.

  The number of the dimples 12a is not limited to two, and the position is not limited to the side surface of the base portion 12, and may be provided on the back surface. In that case, the insertion fixing means of the fixing tool 20 is also appropriately attached to the dimple 12a. Corresponding numbers and positions are provided. Of course, the above examples may be used together. Further, the shape of the base portion 12 is not limited to that described above, and the shape of the forming frame 13 is naturally not limited to this embodiment.

(A) is a perspective view of a work model, (b) is a perspective view of the work model tooth block cut out, (c) is a front view of a state in which the tooth block is extracted from the base part. Disassembled perspective view of tooth mold part, insole and molding frame Longitudinal sectional view of the forming frame when manufacturing the base part of the work model Disassembled perspective view of articulator and fixture (A) is a front view of a state where a fixture is mounted on an articulator, and (b), (c), and (d) are front views showing a procedure for attaching a work model thereto. Perspective view of articulator Front view of working model and counter tooth model fixed to articulator

Explanation of symbols

10 Work model 11 Tooth mold part 11a Dowel pin 11b Tooth mold block 12 Base part 12a Dimple 12b Recess 13 Molding frame 13a Molding recess 13b Projection 14 Insole 20 Fixing tool 21 Upper plate 21a L-shaped piece 21b Gate part 21c Claw 22 Lower plate 22a Slit 22b Flexible part 22c Insert piece 30 Articulator 31 Base 31a Support part 31b Post 32 Arm 40 Opposite tooth model 50 Gypsum

Claims (7)

  In a working model fixing set comprising a dental technician working model and a fixture that is attached to an articulator and fixes the working model to the articulator, the working model comprises a tooth mold part and a base part. A working model fixing set, comprising dimples, wherein the fixture includes a substrate having means for mounting on an articulator, and insertion fixing means for inserting and fixing the dimples of the working model.   The substrate of the fixture is divided into an upper plate and a lower plate, provided with a claw on one or both of the upper plate and the lower plate, and provided with a slit at a position corresponding to the claw on one or both of the upper plate and the lower plate, The work model fixing set according to claim 1, wherein the claw engages with the slit to fix the upper plate and the lower plate.   The work model fixing set according to claim 2, wherein the substrate of the fixture is a donut shape in plan view.   The dimples of the working model are provided at two opposite positions on the side of the base portion, and the fixture extends upward from the upper surface of the substrate, has an L-shaped piece that is bent at the upper end and can be inserted into the dimple, and from the upper surface of the substrate. A gate part extending upward and having a gap in the center, and an insertion piece connected to the substrate through a flexible part and capable of being inserted into the dimple through the hollow part of the gate part. A working model fixing set according to any of the above.   A pin is fixed to the tooth mold part of the working model, an insertion hole for inserting the pin is provided in the base part, and when the pin is inserted into the insertion hole, the back of the base part is exposed. The working model fixing set according to claim 1, wherein a recess is provided in the working model.   The working model for dental technicians according to any one of claims 1 to 5.   The fixture according to any one of claims 1 to 5.

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