JP2014147588A - Artificial denture wax mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an artificial denture wax mold suitable for producing an artificial denture that causes neither deformation of a plate of the artificial denture nor floating of a rear edge portion thereof when a bite plate of a wax denture produced on a working model is replaced with resin so as to obtain the artificial denture.SOLUTION: In a rear portion of a working model 2, a recessed portion wax 4 is attached to a groove-shaped recessed portion 3 disposed on at least a side surface of the working model. A plate edge portion 6a of a bite plate 6 of a wax denture 5 disposed on the working model, and an engagement portion 8 in which the recessed portion wax is coupled with a coupling wax 7 and is engaged with the groove-shaped recessed portion are disposed on the bite plate of the wax denture.

Description

  The present invention relates to a denture wax mold. More specifically, the present invention relates to a denture wax mold suitable for producing a denture having good compatibility with the mucosal surface and the like of a work model, and thus with the patient's mucosal surface and the like.

The wax dentures prepared on the working model in accordance with the usual method are pressure molding method using heat polymerization type cage resin, injection molding method, injection molding method using room temperature polymerization type paste or mud resin, casting The occlusal floor of the wax denture is replaced with a resin by a molding method or the like to obtain a denture.
Non-Patent Document 1 describes various methods including a pressure molding method for manufacturing a denture using a wax denture manufactured on a work model.
Of these, the production of dentures by a pressure molding method using a heat-polymerized cage resin is common.
The production of dentures by the pressure molding method is generally performed by the following steps.
In accordance with a common method, a wax denture in which artificial teeth are arranged and gingiva formed is buried in a flask with a plaster together with a working model, and is cast to obtain a plaster mold having a gap for replacing the occlusal floor of the wax denture with a resin, Fill the voids with the cage resin, pressurize the flask, heat polymerize the cage resin in the pressurized state, and after the polymerization, slowly cool in the pressurized state, take out the denture from the flask together with the plaster mold The dental prosthesis is indexed together with the work model from the plaster mold, the denture is removed from the work model, and the denture is deburred and polished.

Jiro Hasegawa et al., “Amika Dental Science and Technology”, Gakuken Shoin Co., Ltd., May 30, 1989, p. 321-331

Even if dentures obtained by heating and polymerizing rod-shaped resin by pressure molding method are slowly cooled in a flask in a pressurized state, the dentures are determined from the plaster mold and separated from the plaster, and then the denture base (denture base) , The same shall apply hereinafter), and the trailing edge of the floor may rise. Such dentures are less compatible with the mucosal surface.
More specifically, in the case of a full denture of the lower jaw, as shown in FIG. 10, the lower full denture 41 obtained by heat-polymerizing the bowl-shaped resin by a pressure molding method in accordance with a conventional method has a floor rear edge portion. Floats upward or deforms in the buccal direction, resulting in poor compatibility with the mucosal surface of the mandibular working model 42.
In the case of a maxillary complete denture, as shown in FIG. 11, the maxillary complete denture 45 obtained by heating and polymerizing a cage-shaped resin by a pressure molding method according to a conventional method is such that the floor rear edge shrinks forward or And the compatibility with the mucosal surface of the upper jaw working model 46 is inferior.
Such deformation and lift of the upper and lower full dentures due to the thickness of the denture base differing from part to part, etc., during cooling, non-uniform residual stress (for example, the front tooth part) When the resin contracts toward the thicker part, tensile tension is generated, resulting in non-uniform residual stress in the floor), and when the denture is removed from the plaster mold, this stress is relaxed. It is understood.
The lift and deformation of the floor in the upper and lower full dentures are the same for the dentures with few remaining teeth.
This also applies to the manufacture of dentures by injection molding or the like.
Until now, in the manufacture of dentures, in order to obtain dentures with good compatibility, in addition to performing slow cooling after polymerization of the resin as described above, attempts have been made to perform polymerization at a low temperature for a long time, but it is still sufficient. That's not true.
This invention was devised as a result of intensive research in view of the above situation, and in the case of obtaining a denture by replacing the occlusal floor of a wax denture produced on a work model with a resin, An object of the present invention is to provide a denture wax mold suitable for manufacturing a denture that does not cause deformation or lifting of the trailing edge.
Note that the term “denture” in the present invention is not limited to the upper or lower full denture, as is apparent from the above description, and includes a denture with a few residual teeth that are considered equivalent to the full denture. Is.

In order to solve the above problems, a denture wax mold according to the present invention includes: (1) a recess provided in a rear portion of the working model at a rear portion of the occlusal floor of the wax denture provided on the work model; An engaging portion made of wax to be engaged is provided.
(2) In (1), a wax denture occlusion floor provided on the work model, wherein a recess wax is attached to a recess provided on at least a side surface of the work model in the rear part of the work model. It is preferable that an engagement portion that is connected with a wax for connection and is engaged with the recess is provided in the occlusal floor of the wax denture.
(3) In the above (1) or (2), it is preferable that all the wax dentures are base denture wax dentures.
(4) In the above (1), (2) or (3), the concave portion is a groove-shaped concave portion, the concave wax is attached to the groove-shaped concave portion, and the floor edge portion and the concave portion wax are It is preferable that they are connected with a connecting wax.
(5) In the above (4), the groove-shaped recess is a continuous groove-shaped recess having a start end on the left side surface of the work model, a rear side surface, and a terminal end on the right side surface, from the upper side of each side surface. The start end is located near the first molar on the left side of the wax denture, the end is located near the first molar on the right side, and the concave wax is placed in the groove-like recess. It is preferable that the floor edge and the recess wax are connected with a connecting wax.
(6) In the above (4), the groove-shaped recess has a starting end on the left side surface of the working model, reaches the upper surface through the left side of the rear side surface, proceeds forward on the upper surface, then traverses, and rearward on the upper surface Is a continuous groove-shaped recess that reaches the right side of the rear side surface and terminates on the right side surface through the right side of the rear side surface, and is provided at a distance from the upper side of each side surface on each side surface. The start end is in the vicinity of the first molar on the left side of the wax denture, the end is in the vicinity of the right first molar, and the recess wax is attached to the groove-like recess, and the floor edge It is preferable that the recess wax is connected with a connecting wax.

Since the present invention is configured as described above, the following effects can be obtained.
Manufacture of dentures using the denture wax mold of the present invention is performed, for example, by the pressure molding method using a cage-shaped resin as follows. That is, the denture wax mold is buried in the plaster flask together with the working model, and the wax is cast, and the portion of the denture wax mold excluding the artificial teeth (the portion where the occlusal floor and the engaging portion are combined, and so on) is resin. To obtain a gypsum mold (molding mold) having a void for replacement, and filling the obtained void with a cage resin, pressurizing the flask, and heating and polymerizing the cage resin in a heated state, a gypsum mold ( In the molding die), a portion of the denture wax mold excluding the artificial teeth is replaced with a resin (that is, polymerized while being engaged with the work model in the gypsum mold (molding die)). Denture having a substituted engaging portion) is molded, and after polymerization, it is cooled under pressure from a heated state to room temperature, and the denture having the engaging portion is taken out from the flask together with the plaster mold, and from the plaster mold (molding die) Split the denture with the engagement part together with the work model. Then, the engaging portion and the denture on the work model are cut and separated with an appropriate dental tool, such as a cutting tool or a grinding tool exemplified by a bar or point, and the denture is removed from the work model. And finish such as polishing.
The resulting denture does not cause floor deformation or lift of the trailing edge, has good compatibility with the mucosal surface, and is compatible even when used for a long time with the denture installed in the oral cavity. Will not drop.
Dentures with excellent compatibility can be obtained because the denture wax mold has a molded body (denture having an engaging part) in which a portion excluding artificial teeth is replaced with a resin in a plaster mold (mold). The molded body is formed by being cooled under pressure while being engaged with the work model in a gypsum mold (molding mold) from a heated state to room temperature and under a state in which thermal contraction is constrained. Due to the contraction of the denture (with the engaging portion), the stress such as tensile stress that is to be generated in each part is canceled out as a whole, and the residual stress remaining on the front and rear, left and right, up and down of the molded body (denture having the engaging portion) is greatly increased. Although it is understood that it is reduced, it is not clear.
In the denture wax mold of the present invention, the molding method in which a portion excluding artificial teeth is replaced with a resin (denture having an engaging portion) is a pressurization using the above-mentioned heat-polymerized cage resin. The molding method is not limited, and an injection molding method using a heat-polymerized cage resin may be used. And even in the injection molding method using a room temperature polymerization type paste or a muddy resin, the casting molding method, etc., the temperature rises to some extent with the polymerization, and then heat shrinks, and accordingly, residual stress is generated. It may be a molding method. Whichever molding method is used, a denture excellent in compatibility as compared with a conventional denture can be obtained.
In the injection molding method, a wax part for the resin injection guide path may be further provided in the denture wax mold, and in the casting method, the wax part for the resin injection guide path and the wax for the vent passage. What is necessary is just to provide a part.
In other words, the present invention is not a posterior approach such as performing slow cooling after conventional resin polymerization or polymerizing at low temperature for a long time in order to obtain a denture with good compatibility so far. In the production stage of the above, further improvement of the wax-up and work model is performed to form a denture wax mold on the work model, and the part of the denture wax mold excluding the artificial teeth is replaced with a resin ( Density denture having an engaging portion) is made as small as possible to suppress the deformation of the denture floor and the lifting of the trailing edge as a result. Can be prepared by using ordinary dental technology, and the preparation of dentures using denture wax molds can be carried out in the same manner as the preparation of dentures by a conventional method using wax dentures. Since the kill, it does not require any special technology. In addition, although the operation which isolate | separates an engagement part and a denture is required for the obtained molded object (dentures which have an engagement part), it does not become high cost.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of one Embodiment of the denture wax type | mold of this invention, Comprising: (a) is a top view of the denture wax type | mold for upper full dentures, (b) is a rear side view, (c) is A -A line end view, (d) shows a left side view. It is explanatory drawing which shows the relationship between the working model before producing the denture wax type | mold of FIG. 1, and the wax denture for upper full dentures, (a) is a top view, (b) is a rear side view, (c) Is a sectional view taken along line BB, and (d) is a left side view. FIGS. 2A and 2B are explanatory diagrams of a manufacturing process of the denture wax mold of FIG. 1, in which FIG. 1A shows a state before pressing the concave wax, FIG. 1B shows a state where the concave wax is pressed and deformed, and FIG. The state connected with wax is shown. It is explanatory drawing of other embodiment of the denture wax type | mold of this invention, Comprising: (a) is a top view of the denture wax type | mold for mandibular complete dentures, (b) is a rear side view, (c) is C-C line cut end view, (d) shows a left side view. It is explanatory drawing which shows the relationship between the working model before producing the denture wax type | mold of FIG. 4, and the wax denture for lower full dentures, (a) is a top view, (b) is a rear side view, (c) Is a sectional view taken along the line DD, and (d) is a left side view. FIGS. 5A and 5B are explanatory views of a process for producing the denture wax mold of FIG. 4, (a) is a state before pressing the concave wax, (b) is a state where the concave wax is pressed and deformed, and (c) is for connection. The state connected with wax is shown. It is explanatory drawing of further another embodiment of the denture wax type | mold of this invention, Comprising: (a) is a top view of the denture wax type | mold for mandibular complete dentures, (b) is a rear side view, (c) Is an end view taken along line E-E, and (d) is a left side view. It is explanatory drawing which shows the relationship between the working model before producing the denture wax type | mold of FIG. 7, and the wax denture for lower full dentures, (a) is a top view, (b) is a rear side view, (c) Is an end view taken along line F-F, and (d) is a left side view. FIG. 8 is an explanatory view of a process for producing the denture wax mold of FIG. 7, (a) is a state before pressing the concave wax, (b) is a state where the concave wax is pressed and deformed, and (c) is for connection. The state connected with wax is shown. It is explanatory drawing of the incompatibility in manufacture of the conventional mandibular complete denture, (a) is a cut end view explaining the deformation | transformation etc. of the denture after replacing the occlusal floor of a wax denture with the resin, (b) is It is a side view. It is explanatory drawing of the incompatibility in manufacture of the conventional upper full denture, (a) is a cut end view explaining the deformation | transformation etc. of the denture after replacing the occlusal floor of a wax denture with the resin, (b) is It is a side view.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be shown and the present invention will be described in more detail. Of course, the present invention is not limited to the following embodiments.

FIG. 1 is an explanatory view of an embodiment of a denture wax mold of the present invention, and shows a denture wax mold for an upper full denture. FIG. 2 is an explanatory view showing the relationship between the working model before producing the denture wax mold of FIG. 1 and the maxillary full denture wax denture in which artificial teeth are arranged and gingiva is formed.
The denture wax mold 1 shown in FIG. 1 is provided on the work model 2 by attaching a recess wax 4 to a groove-like recess 3 provided on the side surface of the work model 2 at the rear part of the work model 2. The wax edge 5 of the occlusal floor 6 of the wax denture 5 for the upper full denture is connected to the recess wax 4 by the connecting wax 7, and the engagement portion 8 that engages with the groove-like recess 3 is provided in the wax denture 5. It is what has been.
More specifically, as shown in FIG. 2, the groove-like recess 3 provided in the work model 2 is continuous with the start end 3 a on the left side of the work model 2 and the end 3 b on the right side through the rear side. It is a groove-shaped recess and is provided apart from the upper side 2a of each side surface, the starting end 3a is in the vicinity of the first molar on the left side of the wax denture 5, and the terminal end 3b is in the vicinity of the right first molar It is in.

The groove-shaped recess 3 provided on the side surface of the work model 2 is undercut with respect to the upper surface of the work model 2 having the wax denture 5.
The width of the groove-like recess 3 is preferably 5 to 8 mm (preferably about 7 mm), and the depth is 2 to 4 mm (preferably about 2.5 mm).
The groove-like recess 3 is preferably located far from the upper side 2a of the side surface (left side surface, rear side surface, and right side surface) of the rear portion of the work model 2, specifically about 2 to 4 mm (about 3 mm). ) It is preferable to form it on each side of the work model 2 so as to keep the distant position and along the upper side 2a (it can be said to be along the occlusal floor 6 of the wax denture 5), but is not limited to this. .
Such a groove-shaped recess 3 is formed by applying an appropriate cutting tool for dental technology, a grinding tool or the like to the work model 2 as exemplified by a bar or a point. Usually, since the work model 2 is made of gypsum, it is easy to form the groove-shaped recess 3.

In order to produce the denture wax mold 1, for example, the following may be performed.
8-10 mm (when the width of the groove-like recess 3 is 7 mm and the depth is about 2.5 mm, about 9 mm is preferable). The recess-shaped wax 4 is softened by a heating means such as a heater. One end of the concave wax 4 is made to coincide with the start end 3a of the groove-shaped recess 3 on the left side surface of the work model 2, and is bent or appropriately bent or divided as necessary to form the groove-shaped recess 3. It is pressed to the end 3b of the right side surface so that the groove-shaped concave portion 3 is partially buried, and is deformed so that the upper portion of the concave portion wax 4 reaches a position near the upper side 2a of each side surface of the work model 2. (See FIGS. 3A and 3B). Next, the edge of the recess wax 4 is baked on the work model 2 with a wax spatula (not shown) so that the recess wax 4 does not come off or peel off from the work model 2.
Then, using a wax spatula (not shown), the floor edge of the occlusal floor 6 of the wax denture 5 is a sheet-like connecting wax 7 having a thickness of 1.5 to 2.5 mm (more preferably about 2 mm). The portion 6a and the concave wax 4 are connected (see FIG. 3C). More specifically, the floor edge 6a of the occlusal floor 6 of the wax denture 5 and the connecting wax 7 are connected, and then the connecting wax 7 and the recessed wax 4 are connected, or the recessed wax. 4 and the connecting wax 7 are connected, and then the connecting wax 7 and the floor edge 6a of the occlusal floor 6 of the wax denture 5 are connected (the same applies to the following embodiments).
In the following description, unless otherwise specified, the floor edge portion of the occlusal floor of the wax denture and the recess wax and the connection wax are connected as described above using a wax spatula.
Thereby, the wax 1 for dentures which has the engaging part 8 engaged with the groove-shaped recessed part 3 of the work model 2 is obtained (refer FIG. 1).
As the concave wax 4 and the connecting wax 7, paraffin wax, utility wax, or the like may be employed.

  The denture wax mold 1 shown in FIG. 1 does not need to be produced in the order described in FIG. 3, and the floor edge 6 a of the occlusal floor 6 of the wax denture 5 and the connecting wax 7 are connected first, and the concave portion is formed. The working wax 4 may be pressed against the groove-like recess 3 of the work model 2 to connect the recess wax 4 and the connecting wax 7. Detailed description of the process for producing the denture wax mold 1 will be omitted since the process for producing the denture wax mold 1 described with reference to FIG. 3 may be referred to.

In order to manufacture a denture using the denture wax mold 1, for example, a pressure molding method using a cage resin can be employed. This will be described below.
The denture wax mold is buried in the plaster flask together with the working model, and the wax is cast to obtain a plaster mold (molding mold) having a gap for replacing the portion of the denture wax mold excluding the artificial teeth with the resin. When the cage-shaped resin was filled in the obtained gap, the flask was pressurized, and the cage-shaped resin was heated and polymerized under pressure, artificial teeth were removed from the denture wax mold in the gypsum mold (molding mold). A molded body in which the portion is replaced with a resin (that is, a denture having an engagement portion that is polymerized while being engaged with the work model in the gypsum mold (molding die) and replaced with the resin) is molded, and after polymerization Cooling under pressure from the heated state to room temperature, taking out the denture with the engaging part from the flask together with the gypsum mold, indexing the denture having the engaging part together with the working model from the gypsum mold (molding die), and then working model The engagement part and the denture are Appropriate dental cutting tool illustrated in cement, and cut and separated by a grinding tool or the like, remove the denture from the working model, applying denture deburring, finishing such as polishing. The location where the engaging portion and the denture are cut and separated is preferably a location where the connecting wax is replaced with a resin, but is not limited thereto.

  The resulting denture does not cause floor deformation or lift of the trailing edge, has good compatibility with the mucosal surface, and is compatible even when used for a long time with the denture installed in the oral cavity. Will not drop.

  In the denture wax mold of FIG. 1, the start end 3 a of the groove-shaped recess 3 is the position near the first molar on the left side of the wax denture 5, and the terminal end 3 b is the position near the first molar on the right side. It is not a thing.

  The denture wax mold shown in FIG. 1 is for a maxillary full denture, but is not limited thereto, and is a maxillary denture wax mold when there are few remaining teeth that are considered equivalent to the maxillary full denture. Also good.

  In the denture wax mold of FIG. 1, as shown in FIG. 2, a continuous groove-like recess 3 having a start end 3 a on the left side of the work model 2 and a rear end 3 b on the right side through the rear side is adopted. For example, the groove-shaped recess having a predetermined length may be divided into a plurality of portions, or the hole-shaped recesses may be continued at appropriate intervals.

FIG. 4 is an explanatory view of another embodiment of the denture wax mold of the present invention, and shows a denture wax mold for a lower full denture. FIG. 5 is an explanatory view showing the relationship between the working model before producing the denture wax mold of FIG. 4 and the lower denture full denture wax denture in which artificial teeth are arranged and gingiva is formed.
The denture wax mold 11 shown in FIG. 4 is provided on the work model 12 by attaching a recess wax 14 to a groove-like recess 13 provided on the side surface of the work model 12 in the rear part of the work model 12. The floor edges of the left and right occlusal floors 16, 17 of the lower denture wax denture 15 for the lower jaw and the recess wax 14 are connected by the connecting wax 18, and the engaging portion 19 that engages the groove-like recess 13 is the wax denture. 15 is provided.
More specifically, as shown in FIG. 5, the groove-like recess 13 provided in the work model 12 is continuous with a start end 13 a on the left side surface of the work model 12 and a terminal end 13 b on the right side surface through the rear side surface. It is a groove-shaped recess, and is provided far from the upper side 12a of each side surface, the starting end 13a is in the vicinity of the first molar on the left side of the wax denture 15, and the terminal end 13b is in the vicinity of the right first molar It is in.

The groove-like recess 13 provided on the side surface of the work model 12 is undercut with respect to the upper surface of the work model 12 with the wax denture 15.
The width and depth of the groove-like recess 13, the distance from the groove-like recess 13 and the upper side 12 a of the side surface of the rear part of the work model 12 are the same as described with reference to FIG.
Such a groove-like recess 13 is formed by applying an appropriate cutting tool for dental technician, a grinding tool or the like exemplified by a bar or a point to the work model 12 as described above with reference to FIG.

In order to produce the denture wax mold 11, for example, the following may be performed.
The recess-shaped wax 14 having the same cylindrical shape as described above with reference to FIG. 3 is softened by heating means such as a heater, and one end of the recess-shaped wax 14 is used as the start end 13a of the groove-shaped recess 13 on the left side surface of the work model 12. While making it coincident and appropriately bending, or appropriately performing bending and splitting as necessary, it is in pressure contact with the terminal end 13b on the right side surface of the groove-like recess 13 to be partially filled in the groove-like recess 13, The work model 12 is deformed so that the upper part of the concave wax 14 reaches a position near the upper side 12a of each side surface (see FIGS. 6A and 6B). Next, the edge of the recess wax 14 is baked onto the work model 12 with a wax spatula (not shown) so that the recess wax 14 does not come off or peel off from the work model 12.
In the same manner as described above, the sheet-like connecting wax 18 is provided on the left (cheek side) floor edge 16a and the rear floor edge 16b of the left occlusal floor 16 of the wax denture 15. And connecting the right portion of the concave wax 14 to the right (cheek side) floor edge 17a and the rear floor edge 17b of the right occlusal floor 17 of the wax denture 15 with the sheet-like connecting wax 18; Are connected (see FIG. 6C, FIG. 4A, and FIG. 5A).
As a result, the denture wax mold 11 having the engagement portion 19 that engages with the groove-like recess 13 of the work model 12 is obtained (see FIG. 4).

Since the denture wax mold 11 shown in FIG. 4 only needs to be produced, it goes without saying that the denture wax mold may be produced by a process different from the order described above.
In order to manufacture a denture using the denture wax mold 11, for example, a pressure molding method using a cage resin can be employed. The manufacture of the denture is the same as the operation of manufacturing the denture using the denture wax mold shown in FIG. 1 except that the portion to be cut / separated between the engaging portion and the denture is different. Is omitted.

  The resulting denture does not cause deformation or lift of the trailing edge, and has good compatibility with the mucosal surface. There is nothing to do.

  In addition, the denture wax mold produced by omitting the groove-shaped recess in the middle part of the rear side of the work model, that is, the left recess wax pressed against the left groove-shaped recess and the left occlusal floor of the wax denture The floor edge and the back floor edge are connected with the left connecting wax, and the right floor edge and the back floor edge of the right occlusal floor of the wax denture are connected to the right with the right recess wax pressed against the right groove-shaped recess. It is good also as the wax type for dentures connected with the wax.

FIG. 7 is an explanatory view of still another embodiment of the denture wax mold of the present invention, and shows a denture wax mold for a lower full denture. FIG. 8 is an explanatory view showing the relationship between the working model before producing the denture wax mold of FIG. 7 and the wax denture for the lower full denture in which the artificial teeth are arranged and gingiva-formed.
The denture wax mold 21 shown in FIG. 7 has a start end 23a on the left side surface of the work model 22 at the rear part of the work model 22 and an upper end from the left side of the rear side surface, and further has a terminal end 23b on the right side surface through the right side of the rear side surface. A concave wax 24 is attached to a continuous groove-shaped concave portion 23, and the floor edges of the left and right occlusal floors 26, 27 of the lower denture wax denture 25 provided on the work model 22 and the concave wax. 24 is connected with a connecting wax 28, and an engaging portion 29 that engages with the groove-like recess 23 is provided on the wax denture 25.
More specifically, as shown in FIG. 8, the groove-like recess 23 provided in the work model 22 has a start end 23a on the left side surface of the work model and reaches the upper surface through the left side of the rear side surface. Next, a continuous groove-shaped recess having the upper surface rearwardly traversed in a circular arc shape, returning the upper surface rearward to the right side of the rear side, and having the end 23b on the right side through the right side of the rear side. Each side surface is provided far away from the upper side 22a of each side surface, the starting end 23a is in the vicinity of the first molar on the left side of the wax denture 25, and the terminal end 23b is on the right first molar. It is in the vicinity position.
Of the groove-like recesses 23, a groove-like recess that crosses the upper surface of the work model 22 is formed from a position near the left second molar to a position near the right second molar.

The groove-like recess 23 provided on the side surface of the work model 22 is undercut with respect to the upper surface of the work model 22 having the wax dentures 25.
In FIG. 8, of the groove-like recesses 23, the groove-like recesses that cross the upper surface of the work model 22 are circled backward from the position near the left second molar to the position near the right second molar. Although it is formed in an arc shape, the present invention is not limited to this, and it is appropriate in the vicinity of the left first molar to the second molar and the right first molar to the second molar in the occlusal floor of the wax denture 25. What is necessary is just to select, and the shape may also be the groove-shaped recessed part which crosses linearly on either side.
The width and depth of the groove-like recess 23 are the same as those described with reference to FIG.
Of the groove-like recesses 23, the groove-like recesses on the left side surface and the left side of the rear side surface of the work model 22 are maintained at positions 2 to 4 mm away from the upper sides 22 a of both side surfaces of the work model 22 (about 3 mm is preferable). It is preferable to form the work model 22 on both side surfaces along the upper side 22a.
Between the groove-shaped recess 23 that continues to the left end of the groove-shaped recess that crosses the upper surface of the upper surface of the work model 22, 2-4 mm from the right (lingual side) floor edge of the left occlusal floor 26 of the wax denture 25 ( About 3 mm is preferable.) It is preferable to form on the upper surface of the work model 22 so as to keep the separated position and follow the floor edge.
Further, from the right side of the right occlusal floor 27 of the wax denture 25 to the right side of the rear side of the groove-shaped recess 23 from the right end of the groove-shaped recess that crosses the upper surface of the upper surface of the work model 22 to the right side of the rear side, from the floor edge. It is preferable to form it on the upper surface of the work model 22 so as to keep a distance of 2 to 4 mm (about 3 mm is preferable) and to follow the floor edge.
The groove-like recesses on the right side and the right side of the rear side of the work model 22 in the groove-like recesses 23 are located 2 to 4 mm away from the upper sides 22a of both sides of the work model 22 (about 3 mm is preferable). It is preferable to form it on both side surfaces of the work model 22 so as to keep the upper side 22a along.
As described above, such a groove-like recess 23 is formed by applying an appropriate dental cutting tool, a grinding tool or the like to the work model 22 as exemplified by a bar or a point.

In order to produce the denture wax mold 21, for example, the following may be performed.
3 is softened by a heating means such as a heater, and one end of the recess wax 24 coincides with the start end 23a of the groove-like recess 23 on the left side surface of the work model 22. And appropriately bending and dividing as necessary to press-contact to the end 23b of the right side surface of the groove-like recess 23 so that the groove-like recess 23 is partially buried, The side surface is deformed so that the upper portion of the concave wax 24 reaches a position near the upper side 22a of each side surface of the work model 22 (see FIGS. 9A and 9B). Note that the recess wax 24 pressed against the groove recess on the upper surface of the work model 22 in the groove recess 23 may be left as it is, but may be appropriately modified. Next, the edge of the concave wax 24 is baked onto the work model 22 with a wax spatula (not shown) so that the concave wax 24 does not come off or peel off from the work model 22.
In the same manner as described above, the sheet-like connecting wax 28 is used to connect the left occlusal floor 26 to the left (cheek side) floor edge 26a, the rear floor edge 26b, and the right (lingual side) floor of the wax denture 25. The edge portion 26c is connected to the left side portion of the concave wax 24, and the sheet-like connecting wax 28 is used to connect the left (tongue side) floor edge portion 27a of the right occlusal floor 27 of the wax denture 25 to the rear floor edge. The part 27b and the right (cheek side) floor edge part 27c are connected to the right part of the concave wax 24 (see FIGS. 9C, 7A, and 8A).
As a result, a denture wax mold 21 having an engaging portion 29 that engages with the groove-like recess 23 of the work model 22 is obtained (see FIG. 7).

Since the denture wax mold 21 shown in FIG. 7 only needs to be produced, it goes without saying that the denture wax mold may be produced by a process different from the order described above.
For example, first, a groove-like recess 23 crossing the upper surface of the work model 22 is pressed against a recess wax 24 corresponding to the length of the work model 22 and baked on the upper surface with a wax spatula, and then other than the groove-like recess 23 crossing the upper surface. The recess-shaped wax 24 is pressed against the left and right groove-shaped recesses 23, and on each side surface, the upper portion of the recess wax 24 is deformed so as to reach a position near the upper side 22 a of each side surface of the work model 22. Then, the edge of the recess wax 24 is baked on the work model 22 with a wax spatula including the upper and lower sides so that the recess wax 24 does not come off or peel off from the work model 22. The sheet-like connecting wax 28 includes a left (cheek side) floor edge 26a, a rear floor edge 26b and a right (lingual side) floor edge 26c of the wax occlusion tooth 25, and a recess. The left side portion of the wax 24 is connected to the left side (the lingual side) floor edge portion 27a of the right occlusal floor 27 of the wax denture 25, the rear floor edge portion 27b and the right side ( The buccal side) floor edge 27c and the right side of the concave wax 24 may be connected.
In addition, for example, a groove-shaped recess that crosses the upper surface of the work model and other groove-shaped recesses left and right are formed as different groove widths, and cylindrical recesses having different diameters according to the groove width of the groove-shaped recess. The wax for dentures may be produced using the wax for dental use.

  To manufacture a denture using the denture wax mold 21, for example, a pressure molding method using a cage resin can be employed. The manufacture of the denture is the same as the operation of manufacturing the denture using the denture wax mold shown in FIG. 1 except that the portion to be cut / separated between the engaging portion and the denture is different. Is omitted.

  The resulting denture does not cause deformation or lift of the trailing edge, and has good compatibility with the mucosal surface. There is nothing to do.

In the denture wax mold shown in FIGS. 4 and 7, the start end of the groove-shaped recess is the position near the first molar on the left side of the wax denture, and the terminal end is the position near the first molar on the right side. It is not a thing.
The denture wax mold shown in FIG. 4 and FIG. 7 is for the lower full denture, but is not limited to this, and the lower denture wax mold when there are few remaining teeth that are considered equivalent to the lower full denture. It may be.

Next, an example is shown with a comparative example, and it explains in more detail.
Example 1
A denture wax mold for an upper full denture was produced according to the production method described with reference to FIGS.
The groove-shaped recess formed in the work model has a width of about 7 mm and a depth of about 2.5 mm.
The distance from the groove-shaped recess to the upper side of the side surface of the work model is about 3 mm.
The diameter of the concave wax is about 9 mm. The thickness of the connecting wax is about 2 mm.

Using the obtained denture wax mold, heat-polymerized cage resin (trade name; Akron, manufactured by GC Corporation) using MMA and powdered PMMA, the entire upper jaw floor was formed by pressure molding as follows. A denture was prepared.
A plaster mold (molding mold) having a gap for burying a denture wax mold in a flask together with a working model with plaster, flowing, and replacing a portion of the denture wax mold excluding artificial teeth with a resin. Obtain and fill the voids into the cage resin, pressurize the flask, heat polymerize the cage resin in the pressurized state, and remove the artificial teeth from the denture wax mold in the gypsum mold Thus, a molded body in which the portion was replaced with a resin (that is, a denture having an engaging portion which was polymerized while being engaged with a work model in a gypsum mold (molding die) and replaced with a resin) was obtained.
In the heat polymerization, the flask was placed in cold water, heated to boil in about 30 minutes, and moored for 40 minutes after boiling. After the polymerization, the mixture was allowed to cool at room temperature for 30 minutes or more, and then completely cooled in cold water.
The dental prosthesis having the engaging part is taken out from the flask together with the gypsum mold, the denture having the engaging part is determined together with the work model from the gypsum mold (molding die), and then the engaging part and the denture are cut on the work model by a bar. After separation, the denture was removed from the work model, and the denture was deburred and polished.
When the obtained denture was returned to the work model, it was confirmed visually that there was no deformation or lifting from the work model at the rear edge of the floor, and the compatibility was good.

(Comparative Example 1)
Using a wax denture for the maxillary full denture prepared according to the conventional method and the same heat-cured dendritic resin as in Example 1, an maxillary full denture was prepared by the pressure molding method as follows.

In other words, the wax denture with the working model was buried in the flask with gypsum, and the wax was cast to obtain a gypsum mold having a gap for replacing the occlusal floor of the wax denture with the resin, and the obtained resin was filled into the gap. Then, the flask was pressurized, and the rod-shaped resin was heated and polymerized in a pressurized state to obtain a denture.
The heating polymerization conditions and cooling conditions were the same as in Example 1.
The denture was removed from the flask together with the plaster mold, the denture was indexed together with the work model from the plaster mold, the denture was removed from the work model, and the denture was deburred and polished.
When the obtained denture was returned to the work model, the rear edge of the floor was shrunk forward, and it was confirmed visually that the heel was raised upward from the work model.

(Example 2)
A denture wax mold for a full denture of the lower jaw was manufactured according to the manufacturing method described with reference to FIGS.
The groove-shaped recess formed in the work model has a width of about 7 mm and a depth of about 2.5 mm.
The distance between the groove-shaped recess and the upper side of each side surface and the distance between the groove-shaped recess on the upper surface of the work model and the floor edge of the occlusal floor of the wax denture are about 3 mm.
The diameter of the concave wax is about 9 mm. The thickness of the connecting wax is about 2 mm.

Using the obtained denture wax mold, the same heat-polymerized cage resin as in Example 1, and under the same heat-polymerization conditions and cooling conditions as in Example 1 by pressure molding, artificial teeth among denture wax molds A molded body in which the portion other than the resin was replaced with a resin (that is, a denture having an engaging portion which was polymerized while being engaged with the work model in the gypsum mold (molding die) and replaced with the resin) was obtained.
The dental prosthesis having the engaging part is taken out from the flask together with the gypsum mold, the denture having the engaging part is determined together with the work model from the gypsum mold (molding die), and then the engaging part and the denture are cut on the work model by a bar. After separation, the denture was removed from the work model, and the denture was deburred and polished.
When the obtained denture was returned to the work model, it was confirmed visually that there was no deformation or lifting from the work model at the rear edge of the floor, and the compatibility was good.

(Comparative Example 2)
A mandibular complete denture was prepared in the same manner as in Comparative Example 1 by pressure molding using a wax denture for a mandibular complete denture prepared according to a conventional method and the same heat-polymerized cage resin as in Example 1.

In other words, the wax denture with the working model was buried in the flask with gypsum, and the wax was cast to obtain a gypsum mold having a gap for replacing the occlusal floor of the wax denture with the resin, and the obtained resin was filled into the gap. Then, the flask was pressurized, and the rod-shaped resin was heated and polymerized in a pressurized state to obtain a denture.
The heating polymerization conditions and cooling conditions were the same as in Example 1.
The denture was removed from the flask together with the plaster mold, the denture was indexed together with the work model from the plaster mold, the denture was removed from the work model, and the denture was deburred and polished.
When the obtained denture was returned to the working model, the rear edge of the floor was raised upward, and it was confirmed visually that it was deformed in the cheek side direction, and there was difficulty in compatibility.

DESCRIPTION OF SYMBOLS 1 Denture wax mold 2 Work model 3 Groove-shaped recessed part 4 Recessed wax 5 Wax denture 6 Occlusal floor 6a Floor edge 7 Connecting wax 8 Engagement part

Claims (6)

  For dentures, characterized in that a wax engaging portion that engages with a recess provided in the rear part of the work model is provided in the rear part of the occlusal floor of the wax denture provided on the work model. Wax type.   In the rear part of the work model, a recess wax is attached to a recess provided on at least the side surface of the work model, and the floor edge of the occlusal floor of the wax denture provided on the work model and the recess wax 2. The denture wax mold according to claim 1, wherein an engaging portion that is connected by a connecting wax and engages with the recess is provided on the occlusal floor of the wax denture.   The denture wax mold according to claim 1 or 2, wherein the wax dentures are all denture wax dentures.   The concave portion is a groove-shaped concave portion, the concave wax is attached to the groove-shaped concave portion, and the floor edge portion and the concave wax are connected by a connecting wax. Denture wax mold according to 2 or 3. The groove-shaped recess is a continuous groove-shaped recess having a start end on the left side surface of the work model, a rear side surface, and a termination on the right side surface, and is provided far from the upper side of each side surface, The start end is in the vicinity of the first molar on the left side of the wax denture, and the end is in the vicinity of the first molar on the right side,
The denture wax mold according to claim 4, wherein the recess wax is attached to the groove-shaped recess, and the floor edge and the recess wax are connected by a connecting wax. The groove-shaped recess has a starting end on the left side surface of the work model and reaches the upper surface through the left side of the rear side, proceeds forward on the upper surface, then traverses, returns to the rear side on the upper surface, and reaches the right side of the rear side. A continuous groove-like recess having a right end surface on the right side of the rear side surface, wherein each side surface is provided apart from the upper side of each side surface, and the starting end is the left side of the wax denture In the vicinity of the first molar, and the terminal end is in the vicinity of the right first molar,
The denture wax mold according to claim 4, wherein the recess wax is attached to the groove-shaped recess, and the floor edge and the recess wax are connected by a connecting wax.

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