JPH08645A - Resin base denture manufacturing core and its manufacture - Google Patents

Abstract

PURPOSE:To enable up to intercalation and polymerization of resin on an occlusion unit, and provide resin base dentures excellent in adaptation accuracy by burying wax dentures and an occlusion recording mold material printing and recording tip shapes of pairing teeth paired with these wax dentures on the occlusion unit by a low expansion burying material. CONSTITUTION:In the case of manufacturing a resin base denture manufacturing core (a casting mold), upper and lower wax dentures 4 and an occlusion recording mold material 8 printing and recording tip shapes of pairing teeth paired with these wax dentures 4 are buried on a Masonite occlusion unit by using a low expansion gypsum 13 being a low expansion burying material. In the case of manufacturing the core, after a part except an artificial tooth is primarily buried, the occlusion recording mold material 8 and the artificial tooth may be secondarily buried by the low expansion burying material 13. A photopolymerizing resin sheet having a thin film separating layer at least on the pairing tooth side is used as the occlusion recording mold material, and a groove carving 10 is applied to a surface on which secondary burying is performed by the low expansion burying material 13 in photopolymerizing resin 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core (mold) for producing a resin denture, which is capable of filling and polymerizing a resin while maintaining an appropriate occlusion state. And a manufacturing method thereof.

[0002]

2. Description of the Related Art In the conventional resin denture, the manufacturing process is roughly divided. First, a wax denture having an appropriate occlusal relationship is produced on an articulator, and then the wax denture is removed from the articulator and embedded. Then, the core is manufactured. After the wax of the core was filled, the resin was filled and polymerized to complete the resin denture. In the final step, the resin denture was reattached to the articulator to confirm the matching accuracy. Here, in producing the core, it was general to use a flask (iron container) as a container for burying gypsum or the like. In that case, a wax denture was installed in the flask, and after embedding, the upper and lower baffles of the flask were overlapped and the core material was cured to produce the core. Further, various types of flasks have been developed according to the resin polymerization method to be used, and when curing the core material and filling the resin, a dedicated pressurizer and resin filling device for the flask were used.

[0003]

Techniques for producing cores by using various flasks to produce resin dentures are known. However, when using a flask, there are various restrictions on the placement of wax dentures in the flask and the matching of the upper and lower burr of the flask, etc., taking into account the accuracy after hardening of the investment material. There was a need. In a sense, this work requires skill, and if done carelessly, defects such as burrs and displacement of artificial teeth will occur. In addition to this, since burial of the wax denture, core wax, and resin filling / polymerization are performed on the flask with the articulator removed, during this time, no occlusal state can be confirmed.
Therefore, even if the artificial tooth is displaced due to hardening strain of the core material during core production, the resin is filled and polymerized without eliminating it, which may result in providing a patient with a defective resin denture. there were.

Further, since the cost of the manufacturing apparatus including peripheral devices such as a dedicated flask pressurizer and resin filling device increases, there is a problem that the manufacturing cost of the resin denture becomes high.

Further, conventionally, an agar impression material, a special gypsum, a silicone impression material, etc. have been used as a core material. When an agar impression material or a silicone impression material is used, an artificial tooth slightly sinks, while On the contrary, when the special gypsum was used, there was a problem that the artificial tooth floated up.

As described above, in the resin denture manufacturing process according to the conventional method, it was not possible to confirm the matching accuracy until the resin denture was finally reattached to the articulator. On the other hand, if the displacement of the artificial teeth when the core material is hardened and the deformation of the resin floor due to polymerization shrinkage of the resin for the floor are taken into consideration, the occlusal adjustment performed on the articulator is an indispensable work. It is required that the relationship be properly confirmed in the manufacturing process. In view of this, the present invention, in order to obtain a resin denture with a good fitting accuracy, a core that can be filled and polymerized on an articulator without using an embedding container such as a flask, and its production. It is intended to disclose the method.

[0007]

In order to solve the above-mentioned object, according to the present invention, an occlusal recording mold member is provided on an articulator, in which a wax denture and a tip shape of a denture that mates with the wax denture are marked. In order to manufacture this core by using a core embedded with a low expansion investment material, in claim 2, after the wax denture and the counter tooth are attached to the articulator, the articulator is occluded with the articulator open. A method was used in which the tip shape of the aforesaid denture was marked on the recording mold material, and the occlusal recording mold material and the wax denture were embedded in low-expansion plaster. Further, as another manufacturing method, in claim 3, after the wax denture and the counter tooth are attached to the articulator, the tip shape of the counter tooth is marked on the occlusal recording mold with the articulator open. After the primary burying of the portion of the wax denture excluding the artificial tooth, a method of further burying the occlusal recording mold material and the artificial tooth with a low expansion burying material was adopted.

Further, in the core for producing a resin denture according to claim 1, as the occlusal recording mold material, a photopolymerizable resin sheet provided with a thin film separating layer on at least the opposing tooth side is used,
Further, a photopolymerizable resin sheet having a groove on the surface for secondary burying with a low expansion burying material was selectively used.

[0009]

In the present invention, the working model base and the wax denture are manufactured in accordance with the conventional method. It should be noted that the articulator needs to be set in an appropriate occlusal state when the wax denture is manufactured. An appropriate occlusal state means an appropriate occlusal height and a central occlusal position, which is an occlusal relationship between individual upper and lower jaw teeth that adapts to the shape of the oral cavity. It is determined. On the other hand, in the present invention, the core is manufactured on the same articulator after the manufacture of the wax denture, and the wax denture is embedded and hardened by the low expansion investment material on the articulator. At this time, the occlusal recording mold material functions as a part of the core and has an action of maintaining an appropriate occlusal relationship.
Further, at the time of marking, the articulator is opened to about the thickness of the occlusal recording mold material so that the occlusal teeth can be reliably marked on the occlusal recording mold material. It is preferable that the occlusal recording mold material is a material having a small shrinkage / deformation, and is required to have at least durability against the wax softening temperature during waxing. The low-expansion investment material corresponds to low-expansion anhydrite, has a very low hardening and expansion coefficient, and acts to suppress the movement of the artificial tooth during hardening.

According to the third aspect of the present invention, since the double burying method is adopted, the core is divided into the primary burying material and the secondary burying material after the waxing, and the work of filling the floor resin is easily performed. Further, while maintaining an appropriate occlusal relationship, the occlusal pressure acts to remove excess resin from the gap between the two investment materials.

Further, in the present invention, since the photopolymerizable resin sheet is used as the mold material for occlusal recording, the surface shape of the opposing teeth is faithfully marked by its flexibility, and it is rapidly polymerized by irradiation of light. The thin film separation layer functions as a separation layer between the sheet and the mating teeth. Further, in claim 5, the groove of the photopolymerizable resin sheet enhances the adhesiveness with the low expansion investment material,
Moreover, the polymerization shrinkage of the photopolymerizable resin sheet is suppressed.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Each drawing illustrates the manufacturing method of the present invention in the order of steps. First, in the present invention, a wax denture and a working model base are manufactured according to a conventional method prior to the production of a resin denture. FIG. 1 shows a case in which an upper and lower jaw model table is attached to an articulator, and an appropriate occlusal height diameter and central occlusal position of the upper and lower jaws are determined here. In the figure, 1.2 are upper and lower jaw model pedestals made of normal plaster, 3 are upper wax dentures, 4 are lower wax dentures, and upper and lower wax dentures 3 and 4 are model bases 1 and 2, respectively.
After being fused, the articulator 5 is attached. As the articulator 5, a Masonat articulator that moves vertically in the vertical direction (vertical direction in the figure) was used. In this embodiment, since the resin denture is prepared with the two upper right molars as the affected areas, the plaster denture 6 is formed integrally with the upper jaw model base 1 except for the affected areas. Further, the lower jaw side may be a resin denture in use instead of the wax denture. Furthermore, in the present example, a partial denture base was prepared according to the affected part, but the gist of the manufacturing method of the present invention does not change even with a complete denture base.
The same applies to the case of a palate and a palate-free denture base.

Next, FIG. 2 shows the occlusal recording mold material pressed against the opposing teeth. That is, in the second step described with reference to FIG. 2, with the articulator 5 opened to approximately the thickness of the occlusal recording mold material, the mold material is pressed against the mating teeth and the shape of the mating tooth surface is marked. . Here, the pair of dentures is defined as a dentition having an occlusal relationship with the resin denture to be produced, and in the present embodiment, it refers to the right molars 7 ... 7 of the lower wax denture 4. In addition, in this example, the photopolymerizable resin sheet 8 was used as the mold material for occlusal recording. The photopolymerizable resin sheet 8 is sized according to the tooth row of the molars 7 ... 7, and its flexibility ensures that the tooth surfaces of the molars 7 ... It acts to polymerize. As described above, the photopolymerizable resin sheet 8 is used as a mold material for occlusal recording.
When is used, marking of the mating tooth surface is performed with good workability, and the working time can be shortened by rapid polymerization.

Further, since the polyethylene thin film is provided on the mating tooth side of the photopolymerizable resin sheet 8, the sheet 8 can be easily mated as a thin film separating layer without any trouble in marking the mating tooth surface. Can be separated from teeth. Further, in this embodiment, several grooves 10 ... 10 are provided in a grid pattern on the side opposite to the thin film separation layer of the photopolymerizable resin sheet 8. In this case, when the photopolymerizable resin is polymerized and cured, It is possible to avoid contraction / deformation, and it is possible to record the opposing tooth printing surface with higher accuracy. It should be noted that the mold material for occlusal recording is not limited to the photopolymerizable resin sheet 8 provided with the polyethylene thin film of the present embodiment, and any type of hard gypsum with a separating material applied to the opposing teeth side may be used. What is important as an occlusal recording mold material is that it has durability against the wax softening temperature during waxing in a polymerized and cured state, and reliably holds the printing surface.

On the other hand, FIG. 3 illustrates the third step.
The maxillary wax denture 3 is primarily buried with ordinary plaster 12 except for artificial teeth 11 ... In the present invention, the primary investment material is not limited to the ordinary plaster 12 of this embodiment, and another investment material may be used. For example, when silicon is used,
It has a high effect of separating from the resin for the floor, and it is easy to index the resin denture from the core. Further, the order of the above-mentioned second step and third step can be exchanged. However,
Both steps are performed on the articulator 5.

Next, FIG. 4 shows a fourth step. When the photopolymerizable resin sheet 8 and the ordinary gypsum 12 are completely cured,
After applying the core separating material to ordinary plaster 12, low expansion plaster 1
3 and artificial teeth 11 ... 11 and photopolymerizable resin sheet 8
And are buried in a second mass. At this time, the low-expansion gypsum 13 was allowed to enter the grooves 10 ... 10 provided on the photopolymerizable resin sheet 8 to enhance the adhesiveness between the low-expansion gypsum 13 and the sheet 8. Then, the core is completed after the low expansion plaster 13 is cured. Then, the core is removed from the articulator 5 and is waxed to divide the core into a primary investment material and a secondary investment material. At this time, the photopolymerizable resin sheet 8 functions as a part of the core in the secondary investment material.

Although the burial by the double burial method is performed in this embodiment, the maxillary wax denture 3 and the occlusal recording mold material including the artificial teeth 11 ... 11 may be burialed with the low expansion plaster 13 at a time. is there. That is, the third step and the fourth step in this embodiment are allowed to be performed in one step, but what is important in the present invention may be the occlusal recording mold material having the tip shape of the opposing teeth and the affected part. To embed the wax denture on the articulator. However, at least the artificial teeth and occlusal recording mold are buried with low-expansion plaster.

Next, after applying the resin separating material to the above-mentioned core, as a fifth step, the filling mode of the floor resin 14 is shown in FIG.
Shown in In this example, a room temperature polymerization type floor resin was used in consideration of workability. When filling the floor resin 14, the core is made of a primary investment material composed of ordinary gypsum 12, and the resin is filled to a degree that slightly rises from the core. Then, in the sixth step, as shown in FIG.
・ Reattach 2 to articulator 5. At this time, the mating tooth surface shape marked on the photopolymerizable resin sheet 8 is changed to the lower molars 7 ... 7
By occluding the articulator 5 so as to match with, it is possible to reproduce an appropriate occlusal relationship between the upper and lower jaws. Also,
At the same time, by setting the occlusal height in the first step, the occlusal pressure causes excess resin to overflow from the core gap K. This overflowing resin is deleted and the resin filling work is completed.

In the present embodiment, since the masonat articulator that vertically moves in the vertical direction is used, the occlusal pressure acts uniformly on the occlusal surface during the upper and lower jaw occlusion after the resin is inserted, and Make sure that the excess resin overflows without variation.
I was able to delete it. However, the articulator is not limited to the present embodiment, such as a configuration in which the rear edge contact portion of the upper and lower jaw platform is used as a fulcrum to open and close.

In the final step, after filling the floor resin 14,
Polymerization of the resin was performed under pressure on the articulator 5. Then, in this state, when the floor resin 14 becomes a rice cake-like shape, it is removed from the articulator 5, and then the resin floor denture is removed by a conventional process such as completing the polymerization of the floor resin in the pressure polymerization device. Completed The resin denture thus completed is
The artificial teeth 11 ... 11 did not move and had an appropriate occlusal relationship in the oral cavity.

[0021]

As described in detail above, according to the present invention,
Since the process of burying the wax denture to the superposition of the core material was performed on the articulator, it was possible to manufacture a core with an appropriate occlusal relationship with the opposing tooth without any displacement of the artificial tooth. In addition, by using the occlusal recording mold material with the markings of the opposing teeth, the core after waxing can be reconstructed on the articulator, and it is always possible to perform resin filling to resin polymerization with an appropriate occlusal relationship. Because you can
It is possible to provide a resin denture with good fitting accuracy.
Further, since at least the artificial tooth is embedded with the low expansion investment material to form the core, the artificial tooth does not move when the investment material is hardened, and a resin denture denture with higher fitting accuracy can be obtained. Furthermore, since the use of a burial container such as a flask is eliminated at all, it is advantageous in terms of cost because it does not require a manufacturing tool and can contribute to shortening the manufacturing process.

Further, since the photopolymerizable resin sheet is selectively used as the occlusal recording mold material, it is easy to carry out the work of marking the interlocking teeth and the work is shortened because the light irradiation causes rapid polymerization. did it. Further, since the thin film separation layer is provided, it is easy to separate from the mating teeth. Furthermore, in the case of providing the groove, it was possible to prevent the polymerization shrinkage of the photopolymerizable resin sheet and to improve the adhesiveness with the low-expansion gypsum, so that the accuracy of occlusal recording could be further improved. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention and a first step.

FIG. 2 is a perspective view showing a second step of the same.

FIG. 3 is a perspective view showing a third step of the same.

FIG. 4 is a perspective view showing a fourth step of the same.

FIG. 5 is a perspective view showing a fifth step of the same.

FIG. 6 is a perspective view showing a sixth step of the same.

[Explanation of symbols]

 1 Upper jaw model stand 2 Lower jaw model stand 3 Upper wax wax denture 4 Lower jaw wax denture 5 Masonet articulator 6 Gypsum denture 7 Molar 8 Photopolymerizable resin sheet 10 Groove 11 Artificial tooth 12 Ordinary plaster 13 Low expansion plaster 14 Floor resin

Claims (5)

[Claims] 1. A resin floor characterized in that, on an articulator, a wax denture and an occlusal recording mold material having a tip shape of a denture that mates with the wax denture are embedded by a low expansion embedding material. Denture core. 2. The core for producing a resin denture according to claim 1, wherein the occlusal recording mold material is a photopolymerizable resin sheet provided with a thin film separation layer on at least the opposing teeth side. 3. The core for producing a resin denture according to claim 2, wherein the surface of the photopolymerizable resin sheet on which secondary embedding is performed is made with a low expansion embedding material. 4. After mounting the wax denture and the counter tooth on the articulator,
With the articulator open, the tip shape of the aforesaid denture is marked on the occlusal recording mold, and the occlusal recording mold and the wax denture are embedded in a low expansion gypsum resin denture. Manufacturing method of manufacturing core. 5. After mounting a wax denture and a counter tooth on an articulator,
With the articulator open, mark the tip shape of the pair of occlusal teeth on the occlusal recording profile, and after burying the part of the wax denture except the artificial tooth for the first time, the occlusal recording profile and the artificial tooth A method of manufacturing a core for producing a resin denture, characterized in that and are secondarily embedded by a low expansion investment material.