WO2016021050A1 - Base for dental work model - Google Patents

Abstract

Provided is a base for a dental work model, said base being capable of easily improving an error between a pin which is vertically mounted to a fixation plate and a part, into which the pin is to be inserted, of a supporting base. The base (1) for a dental work model comprising a fixation plate (10), on the upper surface of which a tooth model (2) is fixed, pins (20) which are vertically mounted to the lower surface of the fixation plate (10), and a supporting base (30) which is detachably connected to the fixation plate (10) via the pins (20), characterized in that: in a plane part (31) of the supporting base (30), said plane part serving as a connecting part to the fixation plate (10), through holes (32), into which the pins (20) are to be inserted respectively, are formed; and, on the back side of the plane part (31), two or more holding parts (33), for each of the through holes (32), are vertically mounted from the peripheral edge of the through holes (32) so that the pins (20) are slidably held in the inner peripheral surface of the through holes.

Description

Dental work model base

The present invention relates to a dental work model base used for dental work such as preparation of a dental prosthesis.

When part or most of the tooth quality of a human tooth is missing due to caries or other causes, the crown to be treated is cut on all sides and coated with cast metal, It is necessary to restore mastication and other physiological functions. For this purpose, the restoration has a complicated form and must satisfy various requirements, so that the restoration cannot be produced directly in the oral cavity. For this reason, the restoration must be manufactured outside the oral cavity, and in order to manufacture the restoration, a working model that reproduces the state in the oral cavity outside the oral cavity is required. The working model must accurately reproduce the abutment tooth, dentition, missing part, and other oral forms.

Conventionally, when producing a dental prosthesis, (1) a gypsum model is made by pouring gypsum into the tooth profile taken from the patient's oral cavity, (2) a hole for dowel pin planting is formed in the gypsum model, (3) Pour the instantaneous adhesive into the holes to plant and fix the dowel pins, (4) further form anti-rotation grooves, (5) apply the mold release agent to the lower surface of the plaster model and the surface of the dowel pins, It is pushed into a silicone rubber mold for a support base filled with mud, and after the gypsum paste has hardened, it is demolded to obtain a dental work model.

Furthermore, recently, a dental work model made of synthetic resin has been proposed in order to improve workability and realize mass productivity.
For example, a plurality of columnar convex portions and columnar concave portions that can be fitted to each other are provided apart from the side edge on the side portion of the opposing surface of the base and the fixed plate, and predetermined in the central portion along the longitudinal direction of the base and the fixed plate. A dowel pin and a connecting hole for inserting the dowel pin are disposed, and the dowel pin is inserted into the connecting hole, the columnar convex portion is inserted into the columnar concave portion, and the fixing plate is connected to a fixed position of the plastic base. As a matter of fact, there has been proposed a dental technician working model capable of firmly connecting a fixed plate to a fixed position of a base while uniformly mass-producing the base with plastic (see Patent Document 1).
In this technology, in the plastic base, the connecting hole is formed by the molding pin provided in the mold, not directly by the dowel pin to be inserted, so that there is an error in the shape and position with respect to the inserted dowel pin. For this reason, it is said that the problem that it is difficult to firmly connect the fixed plate to the fixed position of the base in the state where the dowel pin is inserted into the connecting hole and the fixed plate is connected to the base.

Japanese Patent No. 5164233

The technique described in Patent Literature 1 is based on the premise that the connecting hole can be error in shape and position with respect to the dowel pin to be inserted, and in order to improve the positional deviation between the fixed plate and the base, The fitting between the columnar convex portion and the columnar concave portion is intended to strengthen the connection between the fixing plate and the base, and does not improve the error itself between the connection hole and the dowel pin.

Therefore, the present invention provides a pin (a connecting hole as referred to in the invention of Patent Document 1) in which a pin suspended from the fixed plate and a pin on a support base (a base referred to in the invention of Patent Document 1) are fitted. It is an object of the present invention to provide a dental work model base that can improve the error itself.

In order to solve the above problems, the present inventors have repeated intensive studies, and as a result, in the dental technician work model of Patent Document 1, the dowel pin is to be inserted into the base cylinder, Rather than forming such a cylindrical body surrounding the entire periphery of the dowel pin, a through hole into which the pin is inserted is formed in the flat portion serving as a connecting portion with the fixed plate in the support base, and the back surface side of the flat portion Further, it is found that it is effective to configure a plurality of holding portions that slidably hold the pin on the inner peripheral surface from the periphery of the through hole so as to be suspended from one through hole. The present invention has been completed.

That is, the dental work model base according to the present invention includes a fixed plate to which a tooth model is fixed on an upper surface, a pin suspended from the lower surface of the fixed plate, and a detachable attachment to the fixed plate via the pin. A dental work model base comprising a support base to be connected, wherein the support base is formed with a through-hole into which the pin is inserted into a flat portion serving as a connection portion with the fixed plate. In addition, a plurality of holding portions that slidably hold the pin on the inner peripheral surface from the periphery of the through hole are provided on the back surface side of the flat portion with respect to one through hole. Features.

According to the present invention, in the support base, a plurality of holding portions that slidably hold the pin on the inner peripheral surface thereof from the peripheral edge of the through hole are provided vertically with respect to one through hole. Even if there is a dimensional error with the part, unlike the conventional cylinder that covered the entire circumference of the pin, the measurement error can be confirmed easily and in detail by visual inspection. It is easy to determine how to correct this.
In addition, unlike conventional cylinders, the pins are held by a plurality of holding parts, so when the support base is a resin molded product, it is possible to handle each holding part even when designing and adjusting the mold. It is possible to fine-tune only the exact part, and the degree of freedom is high.
In addition, the fact that the visible area is wider compared to the conventional cylinder that covers and covers the entire circumference of the pin due to the separated portion existing between the holding part and the holding part is advantageous in that cleaning and the like are easy. It leads to.

It is the disassembled perspective view which looked at the base of the dental work model concerning one embodiment of the present invention from the upper part. It is the disassembled perspective view which looked at the base of the dental work model concerning one embodiment of the present invention from the lower side. It is sectional drawing of the base of the dental work model which concerns on one Embodiment of this invention. FIG. 4 is a cross-sectional view of the base of the dental work model shown in FIG. 3 taken along the line XX. It is a disassembled perspective view which shows a mode that the division | segmentation model was taken out from the base of the dental work model which concerns on one Embodiment of this invention. It is a top view which shows a mode that a division | segmentation model is cut out in the state which fixed the dental work model to the base of the dental work model which concerns on one Embodiment of this invention. It is a front view which shows a mode that a division | segmentation model is cut out in the state which fixed the dental work model to the base of the dental work model which concerns on one Embodiment of this invention. It is a top view which shows a mode that a division | segmentation model is cut out in the state which fixed the dental work model to the base of the dental work model which concerns on one Embodiment of this invention. It is a front view which shows a mode that a division | segmentation model is cut out in the state which fixed the dental work model to the base of the dental work model which concerns on one Embodiment of this invention. It is a bottom view of the base of the dental work model concerning one embodiment of the present invention. It is a bottom view of the base of the dental work model which does not satisfy the configuration of the present invention. It is a front view which shows the state which connected the base of the dental work model which concerns on one Embodiment of this invention with the articulator. It is the perspective view which looked at the state which connected the base of the dental work model concerning one embodiment of the present invention with the mount and packing from the upper part. It is the disassembled perspective view which looked at the state which connected the base of the dental work model concerning one embodiment of the present invention with the mount and packing from the upper part. It is the perspective view which looked at the state which connected the base of the dental work model concerning one embodiment of the present invention with the mount and packing from the lower side. It is the disassembled perspective view which looked at the state which connected the base of the dental work model which concerns on one Embodiment of this invention with the mount and packing from the lower side. It is sectional drawing of the base of a dental work model which shows the modification of a rib. It is the perspective view which looked at the support base of the base of a dental work model which shows the modification of a rib from the lower side. It is the disassembled perspective view which looked at the state which connected the base of the horseshoe-shaped dental work model which concerns on one Embodiment of this invention with the mount and packing from the upper side. It is the disassembled perspective view which looked at the state which connected the base (two divisions) of the horseshoe-shaped dental work model which concerns on one Embodiment of this invention with the mount and packing. It is the disassembled perspective view which looked at the state which connected the base (three divisions) of the horseshoe-shaped dental work model which concerns on one Embodiment of this invention with the mount and packing. It is the disassembled perspective view which looked at the state which connected the base (three divisions) of the horseshoe-shaped dental work model which concerns on one Embodiment of this invention with the mount and packing.

Hereinafter, the base of the dental work model according to the present invention will be described in detail with reference to the drawings. However, the scope of the present invention is not limited to these descriptions, and other than the following examples, Changes can be made as appropriate without departing from the spirit of the invention.

1 is an exploded perspective view of a dental work model according to an embodiment of the present invention as viewed from above, FIG. 2 is an exploded perspective view of the dental work model as viewed from below, and FIG. 3 is a cross-sectional view. 4 is a cross-sectional view taken along line XX in FIG.

The dental work model base 1 includes a fixed plate 10 to which the tooth model 2 is fixed on the upper surface, a pin 20 suspended from the lower surface of the fixed plate 10, and a detachable connection to the fixed plate 10 via the pin 20. The support base 30 is made up of.

In this embodiment, the fixed plate 10 has a rectangular planar shape so as to match the shape of the tooth model 2.

As the material of the fixing plate 10, a synthetic resin is preferable. A synthetic resin alone may be used as a material without mixing other materials, but a synthetic resin mixed with an inorganic material is more preferable. This is because, when a synthetic resin mixed with an inorganic material is used as a material, the cutting can be easily performed without a sense of incongruity when the gypsum tooth model 2 made of gypsum is fixed and cut integrally. In addition, similar effects can be obtained by mixing organic materials such as wood powder (sawdust), although this is not possible when mixed with inorganic materials. Furthermore, you may mix both an inorganic material and an organic material.

In the case of using a synthetic resin mixed with an inorganic material as a material, the mixing ratio of the inorganic material is, for example, preferably 50% by weight or less, and more preferably 30 to 40% by weight. The inorganic material preferably has a hardness of 0.5 to 2, and specific examples thereof include gypsum, talc, oyster shell powder, and the like.
More specifically, for example, about 30 to 40% by weight of gypsum is mixed in polystyrene resin, and azodicarbonamide cell microphone is added in an amount of 0.7% by weight as an organic foaming agent. And the like prepared by melt-kneading at 200 to 210 ° C. in an injection molding machine and then by low-foaming injection molding.

The pin 20 is preferably formed integrally with the fixed plate 10 in terms of production efficiency, but the present invention is fixed to the fixed plate 10 with an adhesive or the like, What is fixed by inserting the upper end of the pin 20 into the hole is not excluded.

The material of the pin 20 is the same material as that of the fixing plate 10 when the pin 20 is formed integrally with the fixing plate 10, but is manufactured separately when the pin 20 is implanted in the fixing plate 10. In some cases, a material different from that of the fixed plate 10 may be used. For example, a metal or the like may be used.

In addition, as shown in FIG. 2 (see also FIG. 10 described later), each of the plurality of pins 20 has an oval shape when viewed from the bottom. The rotation of the fixed plate 10 when inserted into the through hole 32 and the holding portion 33 of the base 30 is suppressed. However, the bottom view shape of the pin 20 is not limited to an oval shape, and may be an appropriate shape. For example, the shape may be a rectangle or an ellipse, and even when these shapes are adopted, the pin 20 The rotation of the fixed plate 10 is suppressed when the is inserted into the through hole 32 and the holding portion 33 of the support base 30.

The pin 20 has a tapered shape (refer to FIG. 4 in particular), and thereby, the pin 20 can be smoothly inserted into the through hole 32 and the holding portion 33.
The plurality of pins 20 are suspended in a positional relationship parallel to each other at regular intervals along the longitudinal direction of the fixed plate 10.
Here, as shown in FIG. 5, the tooth model 2 is cut and divided on both sides of each model tooth 2b.
Therefore, the pin 20 is arrange | positioned at each division | segmentation model 2a, and each division | segmentation model 2a is comprised so that attachment or detachment to the support base 30 is possible.
As a positional relationship of the plurality of pins 20 with respect to the fixed plate 10, the fixed plate 10 is arranged with an appropriate interval from the long end edge and the short end edge of the fixed plate 10.

The material of the support base 30 is preferably a synthetic resin. This is because a work process such as pouring gypsum into a mold or the like is not required unlike a conventional support base made of gypsum, and mass production becomes possible.
As the material of the support base 30, a synthetic resin mixed with an inorganic material may be adopted as in the case of the material of the fixed plate 10, but the material of the support base 30 is a material different from that of the fixed plate 10. It has been confirmed that there is an advantage in adjusting the fitting between the two appropriately.
Therefore, it is preferable that the material of the support base 30 is a synthetic resin that does not mix an inorganic material or the like, and the material of the fixing plate 10 is a synthetic resin that mixes an inorganic material or the like.
Specifically, for example, a polystyrene resin prepared by injection molding after melt-kneading in an injection molding machine can be mentioned.

Note that the support base 30 may be a low-foamed synthetic resin. In this case, a known physical foaming agent or chemical foaming agent can be selected as the foaming agent. It should be noted that precision loss can occur.

In the support base 30, a through hole 32 into which the pin 20 is inserted is formed in a flat portion 31 that is a connection portion with the fixed plate 10.
In the support base 30, a holding portion 33 is suspended from the periphery of the through hole 32 on the back surface side of the flat portion 31.
The inner peripheral shape of the through hole 32 and the inner peripheral shape of the holding portion 33 are basically designed so as to follow the outer peripheral shape of the pin 20.
In the present embodiment, two holding portions 33 are provided for one through-hole so as to slidably hold both side portions of the pin 20 having an oval shape when viewed from the bottom on its inner peripheral surface. Yes. That is, the holding portion 33A holds the pin side portion 20A, and the holding portion 33B holds the pin side portion 20B slidably on the inner peripheral surface.
In this way, the pin 20 can slide with respect to the through hole 32 and the holding portion 33.

Note that the total length of the through hole 32 and the holding portion 33 is set slightly shorter than the total length of the pin 20. Specifically, for example, in a state where the pin 20 is inserted, the tip of the pin 20 has a dimension that protrudes about 1 mm from the tip of the holding portion 33 (see particularly FIG. 4). According to this, there exists an advantage that the operation | work which takes out the pin 20 from the through-hole 32 and the holding | maintenance part 33 is easy by pushing up the said protrusion part from the bottom.

The fixing plate 10 is provided with recesses 11 between the long end edges and the pins 20 at intervals similar to the arrangement intervals of the pins 20 along the longitudinal direction.
On the other hand, the upper surface of the support base 30 is provided with a convex portion 34 that fits into the concave portion 11 of the fixed plate 10.
Due to the fitting of the concave portion 11 and the convex portion 34, the connection between the support base 30 and the fixed plate 10 becomes strong.
In the present embodiment, the convex portion 34 has a quadrangular prism-shaped outer shape, but is not limited thereto, and may be, for example, a cylindrical shape, a hemispherical shape, or the like.
The concave portion 11 has a shape that matches the outer shape of the convex portion 34. If the shape of the convex portion 34 is different, the shape of the concave portion 11 is also different accordingly.

A groove 35 is provided on the upper surface of the support base 30.
This groove 35 is useful when cutting the tooth model 2 and the fixed plate 10 in order to divide the divided model 2 a from the tooth model 2.
That is, when the fixed plate 10 and the support base 30 are connected, a saw for cutting the tooth model 2 and the fixed plate 10 (for example, a saw for cutting plaster) is disposed in the groove 35 with the blade facing upward. From there, it can be rounded up, and by doing so, the divided model 2a is surely provided with a certain area or more.
In particular, in an irregularly arranged tooth, cutting along both sides of each model tooth 2b may not ensure a sufficient bottom area. The significance of securing this is significant.

This will be specifically described with reference to FIGS.
First, when the fixed plate 10 and the support base 30 are connected, a space is generated in the groove 35 provided on the lower surface of the fixed plate 10. The saw is placed here with the teeth facing upwards, from which the saw is cut up.
This rounding is stopped halfway without being completed to the upper end. 6 and 7, the path of the saw in this rounding-up process is indicated by symbol A.

On the other hand, saw teeth are inserted along both sides of the model tooth 2b of the tooth profile model 2 and cut down from above. In that case, it cuts down so that it may lead to the stop position of the saw in the above-mentioned rounding-up process. 8 and 9, the saw path in the cutting-down process is indicated by the symbol B.

By doing as described above, it is possible to cut out along both sides of the model tooth 2b and to ensure a certain area of the bottom.

A position mark 12 for confirming the position of the pin 20 when the tooth model 2 is fixed is formed on the upper surface of the fixing plate 10.
The position mark 12 is an oval mark, but is not limited thereto, and may be a double circle mark, a letter, a number, a symbol, or the like.

On the side of the long side of the fixed plate 10, line marks 13 are projected in parallel with the extended lines of the position marks 12.
In the state where the tooth model 2 is fixed to the fixed plate 10, the position mark 12 is hidden and cannot be seen. Even in this state, the position of the pin 20 can be confirmed by the line mark 13.
In the present embodiment, the fixing plate 10 is provided on one side, but may be provided on both sides. In the present embodiment, the line mark 13 is projected, but it may be groove-shaped.

The support base 30 includes a peripheral wall 36 that is suspended from the periphery of the flat portion 31.
On the peripheral wall 36, line marks 37 are projected in parallel on the extension lines of the position mark 12 and the line mark 13 of the fixed plate 10.
In this embodiment, it is on one side of the support base 30, but it may be provided on both sides as described with respect to the line mark 13 of the fixed plate 10, and it is grooved instead of protruding. Also good.

Next, the connecting portion between the fixed plate 10 and the support base 30 will be described in more detail.
FIG. 10 is a bottom view when the fixed plate 10 is connected to the support base 30.
Further, in order to show the difference from the case where the support base 30 provided with the conventional cylindrical body is used, a bottom view when the fixing plate is connected to the support base 300 provided with such a cylindrical body 210 is shown in FIG. Shown in

In the base of the dental work model shown in FIG. 11, since only the tip portion of the pin 200 and the cylindrical body 330 can be confirmed even when observed from the bottom surface side in a state where the fixed plate is connected to the support base 300, a dimensional error is caused. Even if it improves, the clue cannot be obtained.
It is practical to repeat the fine adjustment of the mold and the connection between the support base 300 and the fixed plate, relying only on the sense of insertion and wobbling when the fixed plate is connected to the support base 300. In the end, as described in Patent Document 1, on the premise that a dimensional error between the support base 300 and the fixing plate may occur to some extent, the means for strengthening the fixing by using other fitting means together Has been sought after.

On the other hand, as shown in FIG. 10, in the base 1 of the dental work model of the present invention, the pin 20 is not covered by the holding portion 33 over the entire periphery thereof. From the gap, the degree of fitting between the pin 20 and the holding portion 33 can be observed.
This observation can be performed not only by visual observation but also by an appropriate measuring device (for example, a telescope, a magnifying glass, etc.), so that the fitting condition can be grasped very precisely.

In addition, since the pin 20 is held by the plurality of holding portions 33, unlike the case where the entire periphery of the pin 200 is connected like the cylindrical body 330, the mold is formed as a divided structure, for example, by visual observation or observation by a measuring instrument. Thus, it is possible to finely adjust only the holding portions 33 evaluated as requiring adjustment individually, and the effect that the degree of freedom in designing and adjusting the mold is greatly improved is also exhibited.

As shown in FIG. 10, the peripheral wall 36 of the support base 30 and the holding portion 33 are connected by a rib 38. Further, the holding portions 33 suspended from the peripheral edge of each through hole 32 are communicated with each other via a rib 38.
With such a configuration, the holding portion 33 can be reinforced. In the present embodiment, the ribs 38 are provided in this way. However, in the case where sufficient strength can be secured without providing the ribs 38 by increasing the thickness of the peripheral wall 36 or the holding portion 33, the ribs 38 are provided. 38 may be omitted.

The dental work model base 1 of the present invention can be used by being connected to an articulator 70.
FIG. 12 is a front view showing a state in which the base 1 of the dental work model according to the embodiment is connected to the articulator 70.
FIG. 13 is a perspective view of the dental work model base 1 connected to the mount 40 and the packing 50 from above, and FIG. 14 is a perspective view of the dental work model base 1 connected to the mount 40 and the packing 50. It is the disassembled perspective view which looked at the state which carried out from the upper side.
FIG. 15 is a perspective view of the dental work model base 1 connected to the mount 40 and the packing 50 from below, and FIG. 16 is a perspective view of the dental work model base 1 mounted to the mount 40 and the packing 50. It is the disassembled perspective view which looked at the connected state from the lower side.

A mount 40 and a packing 50 are connected to the base 1 of the dental work model, and are further connected to an articulator 70 by a plaster 60.

In the support base 30, the peripheral wall 36 hangs from the peripheral edge of the flat surface portion 31, but the support base 30 and the mount 40 are formed on the lower edge of the peripheral wall 36 in the support base 30 and the upper surface of the mount 40. The fitting protrusion 41 and the fitting pinching portion 42 are connected by fitting with each other.

The mount 40 is made of, for example, a synthetic resin and has a rectangular plate shape in plan view with an upper surface that is slightly larger than the bottom surface of the support base 30. By providing a top surface that is slightly larger than the bottom surface of the support base 30, the dental work model base 1 can be easily attached to and detached from the articulator 70.

The fitting protrusion 41 of the mount 40 is fitted to the inner peripheral surface of the lower edge of the peripheral wall 36 in the support base 30. In this embodiment, the four corners of the fitting protrusion 41 are chamfered.
The fitting sandwiching portion 42 of the mount 40 is disposed at a position corresponding to the four corners of the lower edge of the peripheral wall 36 in the support base 30 and has a cylindrical shape with an upper end having a hemispherical shape.
In each of the four corner portions, the chamfered portion of the fitting protrusion 41 and the fitting clamping portion 42 are held in a balanced manner at three points.
However, it is not essential that the four corners of the fitting protrusion 41 are chamfered, and the shape of the fitting sandwiching portion 42 is not limited to a cylindrical shape. For example, the four corners of the fitting protrusion 41 may not be chamfered, and the shape of the fitting pinching portion 42 may be a quadrangular prism shape, a hemispherical shape, or the like.

On the lower surface of the mount 40, a cylindrical bonding convex portion 43 to be bonded to the gypsum 60 is formed at the center. The bonding convex portion 43 is formed with bonding grooves 431 vertically and horizontally, and the plaster 60 enters the bonding grooves 431.

Further, on the lower surface of the mount 40, holding protrusions 44 for holding the packing 50 are vertically provided at the short end edges on both sides.
The heights of the bonding projection 43 and the holding projection 44 are the same.

The packing 50 is interposed between the mount 40 and the plaster 60 when the articulator 70 is mounted on the plaster 60.
It is preferable to give the packing 50 flexibility. For this purpose, for example, a flexible material such as synthetic resin or rubber may be used.
The packing 50 has a rectangular plate shape in plan view. Also, the length of the short side of the packing 50 is the same as the length of the short side of the mount 40, and the length of the long side of the packing 50 is between the two holding projections 44 of the mount 40. The length is adjusted so as to be fitted and held.
The thickness of the packing 50 is set to be the same as the heights of the adhesive projection 43 and the holding projection 44 of the mount 40.
In the center of the packing 50, a fitting hole 51 having the same size as the bonding convex portion 43 of the mount 40 is formed.

By using the packing 50, the amount of plaster 60 used when the dental work model base 1 is mounted on the articulator 70 can be suppressed to a minimum amount.
Moreover, the packing 50 is provided with flexibility, so that the work of removing the base 1 of the dental work model from the articulator 70 is easy.

Although one embodiment of the present invention has been described in detail above, the present invention is not limited to this embodiment, and various modifications can be made without departing from the technical idea thereof.
Such modifications are illustrated in a timely manner in the above description, but, for example, the following modifications can also be made.

That is, for example, in the above embodiment, the groove 35 is formed on the upper surface of the support base 30, but it may be formed on the lower surface of the fixed plate, or the upper surface of the support base and the lower surface of the fixed plate You may make it form in both. When grooves are formed on both the upper surface of the support base and the lower surface of the fixed plate, these grooves can be formed so as to face each other.

Moreover, in the said embodiment, the fixing plate 10 and the support base 30 are connected and fixed with sufficient balance by fitting with the pin 20, the through-hole 32, and the holding | maintenance part 33, and fitting with the recessed part 11 and the convex part 34. However, if the pin 20 and the through-hole 32 and the holding portion 33 can be sufficiently fixed, the concave portion 11 and the convex portion 34 may not be provided. In the case where the pin 20 can be sufficiently fixed only by fitting with the convex portion 34, it is not essential that the pin 20, the through hole 32, and the holding portion 33 are closely fixed.

Further, in the above embodiment, the peripheral wall 36 of the support base 30 and the holding portion 33 are connected by the rib 38, and the holding portions 33 that are suspended from the peripheral edge of each through hole 32 are communicated with each other via the rib 38. Thus, the holding portion 33 is configured to be reinforced.
And in the said embodiment, the rib 38 which connects the surrounding wall 36 of the support base 30 and the holding | maintenance part 33 is exhibiting rectangular shape evidently from FIG. 2, FIG.
On the other hand, for example, a triangular rib can be adopted as a rib for connecting the peripheral wall 36 of the support base 30 and the holding portion 33 in the width direction. 17 and 18 show a modification of such a rib.
FIG. 17 shows the support base 30 shown in FIG. 2 in which only the shape of the rib that connects the peripheral wall 36 of the support base 30 and the holding portion 33 in the width direction is changed. FIG. 18 shows only the shape of the rib that connects the peripheral wall 36 of the support base 30 and the holding portion 33 in the width direction in the base 1 of the dental work model shown in FIG.
17 and 18, the rib 38A that connects the peripheral wall 36 of the support base 30 and the holding portion 33 in the width direction has a triangular shape. Specifically, the rib 38A has a support base on one side. 30 in contact with the peripheral wall 36 of one side, and in contact with the back surface of the flat part 31 of the support base 30 on one side, but is not in contact with the holding part 33 of the support base 30. This is different from the embodiment shown.
Since the holding portion 33 of the support base 30 is not in contact, the holding portion 33 can spread on both sides. Therefore, the operation of inserting the pin 20 into the holding portion 33 becomes smoother, and even if there is a slight dimensional error between the pin 20 and the holding portion 33, the holding portion 33 spreads on both sides, and the pin 20 Is expected to be possible.
As described above, in the modification shown in FIGS. 17 and 18, the holding portion 33 can be expanded on both sides, and the reinforcing effect by the fixing rib 38 </ b> A can be secured to a certain extent.
Note that in a conventional cylinder, for example, a cylinder 330 as shown in FIG. 11, the entire circumference is continuous so as to surround the entire surface of the pin.

Moreover, although the base 1 of the dental work model according to the above embodiment is for a deviated jaw, the present invention is also applicable to the entire jaw. In this case, for example, the base of the dental work model may be configured in a horseshoe shape. This will be described below with reference to FIGS.
In addition, the description which overlaps with the content already demonstrated is omitted suitably. For example, although not explicitly shown in FIGS. 19 to 22, the support base 30 is formed on the back surface side of the flat portion 31 from the periphery of the through hole 32 to the inner periphery thereof, as shown in FIG. A plurality of holding portions 33 that slidably hold the pins 20 are provided vertically with respect to one through hole.

The embodiment shown in FIG. 19 relates to a horseshoe-shaped dental work model base.
FIG. 19 is an exploded perspective view of the dental work model base 1 connected to the mount 40 and the packing 50 as viewed from above.
Implementation of the base for deviating jaws detailed in FIG. 1 etc., except that the shape of the fixed plate 10, the support base 30, the mount 40 and the packing 50 is not a rectangular plane shape but a horseshoe shape. There is no difference from the form.

The embodiment shown in FIG. 20 relates to a base of a two-split type horseshoe-shaped dental work model.
FIG. 20 is an exploded perspective view of the dental work model base 1 connected to the mount 40 and the packing 50 as viewed from above.
In this embodiment, the support base 30 is divided into two at the center of the front tooth portion into a support base 30A and a support base 30B. Correspondingly, in the mount 40, the fitting protrusion 41 that fits to the inner peripheral surface of the lower edge of the peripheral wall 36 in the support base 30 is also replaced with the fitting protrusion 41A and the fitting protrusion 41B. It is divided into two.
Except for the above points, there is no difference from the embodiment shown in FIG.

The embodiment shown in FIG. 21 relates to a base of a three-split type horseshoe-shaped dental work model.
FIG. 21 is an exploded perspective view of the dental work model base 1 connected to the mount 40 and the packing 50 as viewed from above.
In this embodiment, the support base 30 is divided into three parts: a support base 30C, a support base 30D, and a support base 30E. Correspondingly, in the mount 40, the fitting protrusion 41 which is fitted to the inner peripheral surface of the lower edge of the peripheral wall 36 in the support base 30 is also fitted with the fitting protrusion 41C and the fitting protrusion 41D. The fitting protrusion 41E is divided into three.
In the present embodiment, the fixed plate 10 includes a fixed plate 10A and a fixed plate 10B, and does not include a portion corresponding to the front tooth portion.
A fixed plate 10A is detachably connected to the support base 30C, and a fixed plate 10B is detachably connected to the support base 30D via pins 20, respectively.
The support base 30E corresponds to the front tooth portion, and when the fixed plate 10A and the support base 30C are connected to the fixed plate 10B and the support base 30D via the pins 20, respectively, the upper surface of the fixed plate 10A is fixed. The height is higher than the support base 30C and the support base 30D by the thickness of the fixed plate 10 so that the upper surface of the plate 10B and the upper surface of the support base 30E are flush with each other.
As described above, the upper surface of the fixed plate 10A, the upper surface of the fixed plate 10B, and the upper surface of the support base 30E are configured to be flush with each other, so that the horseshoe-shaped tooth model can be fixed without difficulty.
Except for the above points, there is no difference from the embodiment shown in FIG.

The embodiment shown in FIG. 22 also relates to a base of a three-part horseshoe-shaped dental work model.
FIG. 22 is an exploded perspective view of the dental work model base 1 connected to the mount 40 and the packing 50 as viewed from above.
However, it differs from the embodiment of FIG. 21 in the following points.
That is, in the present embodiment, the support base 30 does not include the support base 30E corresponding to the front tooth portion as in the embodiment shown in FIG. Are provided integrally with the mount 40.
Except for the above points, there is no difference from the embodiment shown in FIG.

As described above, a plurality of examples of the base of a horseshoe-shaped dental work model have been shown. However, since it is possible to use a common member, it is not necessary to capture all the members as a set. It is possible to make another embodiment by changing the member of the part.
For example, in a case where a person holding the fixed plate 10, the support base 30, the mount 40, and the packing 50 shown in FIG. 19 is considered to implement the two-divided form, the support base 30 is shown in FIG. It is sufficient to change to the base 30A and the support base 30B, and to change the mount 40 to one having the fitting protrusion 41A and the fitting protrusion 41B, and the fixing plate 10 and the packing 50 are already held. You can use things.
Thus, the point that the same member can be used repeatedly including between different embodiments is preferable in terms of cost and waste reduction.

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

1 Dental Work Model Base 2 Tooth Profile Model 2a Divided Model 2b Model Teeth 10, 10A, 10B Fixing Plate 11 Recess 12 Position Mark 13 Line Mark 20 Pin 30, 30A-30E Supporting Base 31 Planar Portion 32 Through Hole 33 Holding Portion 34 Projection 35 Groove 36 Peripheral wall 37 Line mark 38, 38A Rib 40 Mount 41, 41A-41E Fitting protrusion 42 Fitting clamping part 43 Adhesion protrusion 431 Adhesion groove 44 Holding protrusion 45 Swelling part 50 packing 51 fitting hole 60 gypsum 70 articulator

Claims (4)

1. A dental work model base comprising: a fixed plate to which a tooth model is fixed on the upper surface; a pin suspended from the lower surface of the fixed plate; and a support base detachably connected to the fixed plate via the pin. A stand,
   The support base has a through-hole into which the pin is inserted and inserted into a flat portion serving as a connecting portion with the fixed plate, and the back surface side of the flat portion has an inner periphery from the periphery of the through-hole. A plurality of holding portions that slidably hold the pin on the peripheral surface are vertically provided with respect to one through hole,
   Dental work model base.
2. The pin has an oval shape, a rectangular shape, or an elliptical shape when viewed from the bottom, and the holding portion holds one of the through holes so that each of the both side portions of the pin is slidably held on its inner peripheral surface. The dental work model base according to claim 1, wherein the dental work model base is vertically suspended.
3. The dental work model base according to claim 1 or 2, wherein the support base includes a peripheral wall suspended from the periphery of the flat portion, and the peripheral wall and the holding portion are connected by a rib. .
4. The dental work model base according to any one of claims 1 to 3, wherein each holding portion suspended from the periphery of each through hole of the support base communicates.

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