KR101814723B1

KR101814723B1 - Method for fabricating ceramic detal prosthesis

Info

Publication number: KR101814723B1
Application number: KR1020150106535A
Authority: KR
Inventors: 김기수; 이용식
Original assignee: 김기수; 이용식
Priority date: 2015-07-28
Filing date: 2015-07-28
Publication date: 2018-01-04
Also published as: KR20170013627A

Abstract

The present invention relates to a method of manufacturing a nonmetallic dental prosthesis, in particular a ceramic nonmetallic dental prosthesis, in which a ceramic core can be easily separated from a tooth model without damage by using a mold of elastic material or by applying pressure to a ceramic sludge formed of a core .

Description

METHOD FOR FABRICATING CERAMIC DETAL PROSTHESIS FIELD OF THE INVENTION [0001]

The present invention relates to a method of manufacturing a nonmetallic dental prosthesis, in particular a ceramic nonmetallic dental prosthesis.

There are various types of dental prosthesis for restoration of teeth that have been defective or removed by tooth decay, such as inlay, onlay, crown, bridge, and implant.

Inlay cure is a treatment method to remove cavities and then fill the missing parts with cores such as gold, resin, or ceramics. This treatment is usually performed when tooth contact occurs between teeth or on the chewing surface. On-ray therapy is used when the area removed is larger than the inlay treatment, and crown therapy is used when the area removed is larger than onlay.

The filling material is mainly made of gold, resin, ceramics, amalgam, etc. It is a treatment method to restore the function and shape of the tooth after it is made in the same shape as the lost tooth and attached with dental cement.

Gold in the filling material has no toxicity, can be made with strength similar to that of a natural tooth, and is most often used because it does not change color or corrode. It can also be used when the cavity area is wide. However, the treatment period is long, it falls cosmetically, and it is costly.

Resin has good adhesion, so it is less likely to come out of the teeth. It has the same color as the teeth, so it is good for cosmetic use. However, it is hard to use because it is made of plastic material. I never do that.

Amalgam is economical and easy to treat because it is covered by medical insurance, but has a short life span.

Ceramics are ceramics-like materials. They are stable and have almost the same color as teeth, but they are expensive and difficult to work compared to gold or resin.

In the case of materials that can flow like gold or amalgam, a tooth model of a part removed by gypsum or the like can be made, and a mold containing the shape corresponding to the shape of the mold can be poured with a fluidic prosthesis material, have.

On the other hand, since ceramic materials such as zirconia and alumina are non-fluid materials, it is difficult to adopt the above-described casting method. It is difficult to separate the ceramic material from the mold, and breakage or deformation occurs in the process of separation.

Published Japanese Patent Application No. 10-2005-0003888 (Dec. 12, 2005) Open Patent Publication No. 10-2012-0111578 (Oct. 10, 2012) Patent Registration No. 10-1478208 (December 31, 2014)

Accordingly, an object of the present invention is to provide a method of manufacturing a ceramic prosthesis using a ceramic material, which is manufactured in a casting form without breakage when an inlay, an onlay, a crown, or the like is manufactured.

A method of manufacturing a ceramic prosthesis to be restored to a portion of a natural tooth according to the present invention includes the steps of: preparing a tooth model corresponding to the contour of the natural tooth; Forming a core by filling a ceramic sludge in a space to be restored in the tooth model; And pressing the sludge-filled tooth model to which the core and the tooth model are coupled.

Further, the pressing step may be performed when the core is semi-dry.

Drying the pressurized sludge-filled tooth model; Separating the core from the sludge-filled tooth model; And sintering the core.

The method may further include forming a wax pattern having a predetermined thickness in the space to be at least restored in the tooth model before forming the core.

Meanwhile, a method of manufacturing a ceramic prosthesis to be restored to a portion of a natural tooth according to the present invention includes the steps of: preparing a tooth model corresponding to the contour of the natural tooth; Filling ceramic sludge in the space to be restored of the tooth model; Separating the core from the tooth model when the core, which is the charged sludge, is dried, and the tooth model may be an elastic material.

In addition, the tooth model may be a material including agar or a silicon material.

Further, the method may further include the step of forming a coated film of the organic material on the tooth model, and the sludge filling step may fill the ceramic sludge with the tooth model coated with the organic material component.

The step of fabricating the tooth model may further include the steps of: preparing a first model impressed on the natural teeth or a second model prepared on the first model; Forming a wax pattern having a predetermined thickness on the preparation model; Preparing a impression material in a preparation model in which the wax pattern is formed; And fabricating the tooth model using the obtained impression material.

The step of forming the wax pattern may include the steps of: fabricating a popular jig of a tone corresponding to the preparation model; Forming at least one through hole in the jig; Machining at least one of the preparation model and the jig so that a pupil is formed on a face opposite to the jig and the preparation model; Attaching the wax to the preparation model; Bonding the jig to a preparation model to which the wax is added to form the wax into a layer having a predetermined thickness; And removing the wax disposed in the through-hole of the jig.

The jig for manufacturing a ceramic prosthesis according to the present invention is characterized in that a cavity is formed in a portion that serves as a mold to be filled with at least ceramic sludge among the portions facing the production model, The portion contacting the cavity is formed with a through hole connected to the outside so that a wax pattern having a predetermined thickness is formed in the cavity by coupling with the manufacturing model and the excess wax is discharged to the through hole.

According to the present invention, it is possible to easily remove the ceramic sludge from the mold without breakage by using a mold of an elastic material or pressing the ceramic sludge.

1 is a perspective view and a sectional view of a tooth model according to an embodiment of the present invention,
FIG. 2 illustrates an impression material obtaining process according to an embodiment of the present invention,
3 is a cross-sectional view of a jig according to an embodiment of the present invention,
4 is a perspective view and a sectional view of a tooth model according to another embodiment of the present invention,
FIG. 5 illustrates a process of generating a wax pattern according to an embodiment of the present invention,
6 is a cross-sectional view of a tooth model in which a wax pattern is formed according to an embodiment of the present invention,
FIG. 7 is a cross-sectional view of an impression material and a tooth model according to an embodiment of the present invention,
8 is a cross-sectional view of a tooth model filled with a ceramic sludge according to an embodiment of the present invention,
11 is a flowchart illustrating a method of manufacturing a dental prosthesis according to an embodiment of the present invention.
12 is a flowchart illustrating a method of manufacturing a dental prosthesis according to another embodiment of the present invention,
13 is a sectional view of a tooth model in which a part of a tooth model is cut according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Also, the fact that the first component and the second component on the network are connected or connected means that data can be exchanged between the first component and the second component by wire or wirelessly.

In addition, suffixes "module" and " part "for the components used in the following description are given merely for convenience of description, and do not give special significance or role in themselves. Accordingly, the terms "module" and "part" may be used interchangeably.

When such components are implemented in practical applications, two or more components may be combined into one component, or one component may be divided into two or more components as necessary. The same reference numerals are given to the same or similar components throughout the drawings, and detailed descriptions of components having the same reference numerals can be omitted and replaced with descriptions of the above-described components.

FIG. 1 is a perspective view and a cross-sectional view of a tooth model according to an embodiment of the present invention. FIG. 2 illustrates an impression material collecting process according to an embodiment of the present invention. FIG. FIG. 4 is a perspective view and a cross-sectional view of a tooth model according to another embodiment of the present invention, FIG. 5 illustrates a process of generating a wax pattern according to an embodiment of the present invention, FIG. FIG. 7 is a cross-sectional view of an impression material and a tooth model according to an embodiment of the present invention. FIG. 8 is a cross-sectional view of a ceramic sludge according to an embodiment of the present invention. Sectional view of a tooth model.

In this specification, a tooth model corresponds to a natural tooth, which is a first model directly obtained from a 0th impression body obtained by impression of a natural tooth, a second model manufactured by a first impression body obtained by impressing a first model, and the like . &Lt; / RTI > In addition, the model produced by the impression body can be summarized by block-out or marginal theorem.

Referring to FIG. 1, it may be a first-order model 10 manufactured by a 0-dimensional impression material directly imprinted with natural teeth according to an embodiment. A plurality of primary models 10 can be produced. A tooth model made from a zero-impression impression may include adjacent teeth. It is assumed that this figure shows the first model 10 in which the adjacent teeth are omitted or the adjacent teeth are deleted. The primary model 10 can be a block out operation for arranging the undercuts, a margin cleaning operation for defining the boundary for forming the prosthesis, and the like.

Referring to FIG. 2, a primary impression member 20 having a primary model as an impression material can be manufactured on the primary model 10 of FIG. A plurality of such first impression members 20 can be manufactured.

Referring to FIG. 3, the inner surface of the first impression body 20 may be removed to have a predetermined thickness, and the impression body 21 may be manufactured. The jig pulling member 21 may be made of a jig 22 by forming one or two or more through holes 25.

Referring to FIG. 4, the preparation model 11 can be manufactured by deleting the outer surface of the primary model 10 to a predetermined thickness. The preparatory model (11) can be produced from a second-order model replicating the first model (10).

The jigs 22 may be formed only by forming the through holes 25 in the primary impression body 20 or the preparation model 11 may be the same as the primary model 10. At least one of the jig 22 and the preparation model 11 must have a margin with the primary model 10 so that a cavity can be formed on the surface where the jig 22 and the preparation model 11 face each other. It is preferable to process both the jig 22 and the preparation model 11 so as to have a margin with the primary model 10, in order to produce a final tooth model having an appropriate margin.

5, a wax 30 is applied to the preparation model 11 (Fig. 5 (a)), the jig 22 is engaged, and the cavity between the preparation model 11 and the jig 22 is wax 30). The excess wax 30 can be discharged to the through hole 25 of the jig 22. [

Referring to Fig. 6, the jig 22 is removed in Fig. 5 (b), and unnecessary wax 30 (for example, wax 30 protruding into through-hole 25) 11, a wax pattern 31 having a predetermined thickness can be formed.

7, a pulling body 23 can be manufactured from the preparation model 11 having the wax pattern 31 shown in Fig. 6, and the tooth model 12 can be manufactured from the impression body 23. Fig. Each of the impression body 23 and the tooth model 12 may be a final impression body and a final model.

The final tooth model 12 may be a preparation model 11 in which the wax pattern 31 of FIG. 6 is formed.

Referring to FIG. 8, a restoration model can be manufactured by working the inlay 41 or the onlay / crown 43 according to the state of the natural tooth being removed.

The wax pattern 31 of a certain thickness can provide a margin for the dental cement to enter when the prosthesis made by molding the final tooth model 12 is bonded to the natural tooth.

FIG. 9 is a flowchart illustrating a method of manufacturing a tooth model according to an embodiment of the present invention, and FIG. 10 is a flowchart illustrating a method of manufacturing a wax pattern according to an embodiment of the present invention. Please refer to Figs. 1 to 8. Fig.

Referring to FIG. 9, a preparation model can be produced (S210). The preparation model may be one of the primary model 10 of FIG. 1 and the preparation model 11 of FIG. In this embodiment, the preparation model is assumed to be the preparation model 11 of FIG.

The wax pattern 31 may be formed on the preparation model 11 (S220). The wax pattern 31 may be formed without the jig 22 described above, or may be formed using the jig 22. [

Referring to FIG. 10, a preparation model may be prepared to manufacture the wax pattern 31 (S210). The preparation model may be one of the primary model 10 of FIG. 1 and the preparation model 11 of FIG. In this embodiment, the preparation model is assumed to be the preparation model 11 of FIG.

The jig 22 can be manufactured from the preparation model 11 (S260). 7, the jig impression body 21 and the jig 22 before the through-hole 25 is formed can be referred to as being mixed. At least a portion of the preparation mold 11 corresponding to the portion to be filled with the ceramic sludge and the corresponding depressed portion of the jig 22 can be machined so that a cavity is formed between the preparation model 11 and the jig 22 .

The through hole 25 through which the wax is discharged into the jig 22 can be formed (S280).

When the wax 30 is attached to the preparation model 11 and then pressurized and pressed into the preparation model 11 by the jig 22, the excess wax 30 can be discharged through the through hole 25 (S290). Thereafter, the jig 22 is removed, and the wax surface is trimmed, whereby the wax pattern 31 can be formed.

Referring to FIG. 9, the impression member 23 can be obtained from the preparation model 11 in which the wax pattern 31 is formed (S230). The impression member 23 can have a margin with natural teeth due to the wax pattern 31. [

The tooth model 12 can be manufactured from the impression body 23 (S240).

FIG. 11 is a flowchart illustrating a method of manufacturing a dental prosthesis according to an embodiment of the present invention, and FIG. 13 is a sectional view of a tooth model in which a part of a tooth model according to an embodiment of the present invention is cut. Please refer to Figs. 1 to 10.

Referring to FIG. 11, a work tooth model can be manufactured (S310). The working tooth model is one of the primary model 10 in Fig. 1, the preparation model 11 in Fig. 4, the preparation model 11 in which the wax pattern 31 in Fig. 6 is formed, and the tooth model 12 in Fig. Lt; / RTI > In this embodiment, the working tooth model is preferably the tooth model 12 of FIG. 7 in particular. Hereinafter, the working tooth model is assumed to be the tooth model (12).

In this embodiment, the material of the tooth model 12 is preferably an elastic material. The model may be a material for elastic models or a resilient impression material. For example, the model may include alginate, agar, agar-alginate associative material, rubber, polysulfide, various types of silicon (condensation silicon, addition polymerization silicon)) can be used.

The material component may be applied to the tooth model 12 (S320). The portion to be coated preferably includes a portion to be filled with the ceramic slurry. The active ingredient is a material such as vaseline which, depending on the material, can prevent the release of water or act as a separating agent. For example, when the tooth model 12 is an agar material model, agar drying can be prevented. Since the shrinkage strain is high when agar is dried, it is necessary to prevent drying. When the tooth model 12 is a rubber material, the material can easily separate the tooth model 12 from the ceramic sludge.

The core may be manufactured by filling the tooth model 12 with the ceramic slurry or the tooth model 12 coated with the organic material component at step S330. The ceramics of the ceramic slurry may be alumina, zirconia, or a mixture thereof. Assume that the core 41 is formed as shown in FIG. 8 (a), assuming inlay treatment in this embodiment.

When the tooth model 12 is an agar or alginate material, it is preferable to charge the ceramic slurry within 10 minutes after the model is manufactured. This is because the deformation with time is large, and the manufactured core may not have the desired shape or dimensions.

When the core solidifies, the core 41 can be separated from the tooth model 12 (S340). In general, the ceramic series is a non-flowable material, so that it is not easy to separate the core 41 from the molded tooth model 12. However, according to this embodiment, since the tooth model 12 is an elastic material, the core 41 can be easily separated from the tooth model 12. This is because when the tooth model 12 of the elastic material is spread around the core 41, the tooth model 12 is deformed and this deformation provides a space in which the core 41 can easily escape. That is, according to the present embodiment, the ceramic core 41 can be detached from the tooth model 12 as it is without being broken.

A portion of the tooth model 12 may be cut so that the thickness of the tooth model 12 facing the core 41 and the core 41 is thinned before the core 41 is separated at step S335. For example, a sheath can be formed as shown by the dotted line in Fig. In this case, the elasticity of the tooth model 12 in contact with the core 41 is further improved (the thickness becomes thinner), so that it becomes easier to separate the core 41 from the tooth model 12.

The separated core 41 can be sintered (S500). The core 41 is put into an electric furnace, and the electric furnace temperature is maintained at 1100 to 1400 degrees, whereby the core 41 can be sintered. The subsequent step can be performed by a usual process to produce a crown, an inlay, or an onlay.

When the core 41 according to the present embodiment is bonded to a natural tooth, the core 41 is held by the cavity between the preparation model 11 and the jig 22 and the wax pattern 31, Lt; / RTI >

12 is a flowchart illustrating a method of manufacturing a dental prosthesis according to another embodiment of the present invention. Please refer to Figs. 1 to 11. Fig.

Referring to FIG. 12, a work tooth model can be manufactured (S310). The working tooth model is one of the primary model 10 in Fig. 1, the preparation model 11 in Fig. 4, the preparation model 11 in which the wax pattern 31 in Fig. 6 is formed, and the tooth model 12 in Fig. Lt; / RTI > In this embodiment, the working tooth model is preferably the tooth model 11 of FIG. 7 in particular. Hereinafter, the working tooth model is assumed to be the tooth model (11).

In this embodiment, the material of the working tooth model may be a material for the model which can be manufactured from the impression material. That is, metals, resins, gypsum products and the like may be used, and the elastic materials described in FIG. 11 may be used. In particular, the tooth model 11 according to the present embodiment can separate the core 41 from the tooth model 11 without breaking or deforming even if it is made of gypsum.

The core 41 may be manufactured by filling the tooth model 12 with ceramic sludge (S420). The sludge-filled tooth model filled with the tooth model 11 of the core 41 may be put into the pressurizing tank and pressurized (S430). After pressing the slurry-filled tooth model out of the pressurized tank for a certain period of time, the slurry-filled tooth model can be dried (S440). Drying is preferably carried out at room temperature.

Thereafter, the core 41 is separated from the teeth model 11 (S450), and a normal sintering process can be performed (S500).

The reason why the core 41 is easily separated from the tooth model 11 seems to be that the pressure applied to the core 41 causes the core 41 to shrink a small amount uniformly overall. Further, it is preferable to press the core 41 when the core 41 is in a semi-dry state in which it is not completely dried. It is believed that the moisture must remain in the core 41 to allow for minor shrinkage.

In order to easily separate the core 41 from the tooth model 11, the sludge-filled tooth model can be heated during the separation process. The core 41 is easily separated from the tooth model 11 when the wax pattern 31 is disposed between the tooth model 11 and the core 41 and the wax pattern 31 melts at a high temperature It is because. Sludge filling Tooth model can be heated by using a torch or by heating a sludge-filled tooth model into a heating furnace such as a crucible. The heating temperature is sufficient if the wax pattern 31 melts.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

12: tooth model 22: jig
25: through hole 31: wax pattern
41, 43: core

Claims

A method of manufacturing a ceramic prosthesis to be restored to a removed portion of a natural tooth,
Fabricating a tooth model corresponding to the contour of the natural tooth;
Forming a core by filling a ceramic sludge in a space to be restored in the tooth model; And
And pressurizing the sludge-filled tooth model to which the core and the tooth model are coupled,
Wherein the tooth model is an elastic material.

The method according to claim 1,
Wherein the pressing step presses the core when the core is semi-dry.

The method according to claim 1,
Drying the pressurized sludge-filled tooth model;
Separating the core from the sludge-filled tooth model; And
And sintering the core. &Lt; Desc / Clms Page number 20 >

The method according to claim 1,
Further comprising forming a wax pattern of constant thickness in the space to be restored of the tooth model before forming the core.

A method of manufacturing a ceramic prosthesis to be restored to a removed portion of a natural tooth,
Fabricating a tooth model corresponding to the contour of the natural tooth;
Filling ceramic sludge in the space to be restored of the tooth model;
Separating the core from the tooth model when the core, which is the charged sludge, is dried,
Wherein the tooth model is an elastic material.

6. The method of claim 5,
Wherein the tooth model is a material including agar or a silicon material.

6. The method of claim 5,
Further comprising the step of forming a coating film of a known material on the tooth model,
Wherein the sludge filling step charges the ceramic sludge to a tooth model to which the organic material component is applied.

6. The method according to claim 1 or 5,
In the tooth modeling step,
Preparing a first model impressed on the natural teeth or a second model prepared on the first model;
Forming a wax pattern having a predetermined thickness on the preparation model;
Preparing a impression material in a preparation model in which the wax pattern is formed; And
And fabricating the tooth model using the obtained impression material.

9. The method of claim 8,
Wherein the forming of the wax pattern comprises:
Fabricating a jig popular in music corresponding to the preparation model;
Forming at least one through hole in the jig;
Machining at least one of the preparation model and the jig so that a pupil is formed on a face opposite to the jig and the preparation model;
Attaching the wax to the preparation model;
Bonding the jig to a preparation model to which the wax is added to form the wax into a layer having a predetermined thickness; And
And removing the wax disposed in the through-hole of the jig.

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