KR20140106230A - The artificial denture teeth possible to realize color of natural tooth and thereof manufacturing method - Google Patents

Abstract

The present invention relates to an artificial denture tooth having a color of a natural tooth. The artificial denture tooth is injection-molded by using a 2-color injection molding device, in which a molding part is formed inside an upper mold and a lower mold, which are used for producing the artificial denture tooth and include an upper tooth surface having a groove to chew foods and a side tooth surface curved in a shape of an arc. A part line for producing the artificial denture tooth is laterally bent about front section of the tooth along a lateral upper portion of the artificial denture tooth so that an artificial molar is horizontally moved from an upper portion of a rear surface to the lateral side. The part line is bent downward from both sides thereof. The artificial denture tooth includes a one-color molded article produced by inputting a mixture of a polymer and a monomer into a mold and a two-color molded article produced by inputting a mixture having mixed color into the mold. A resin tooth fixing hole is formed at a bottom center of the one-color molded article. By adjusting an interval between the one-color molded article and the two-color molded article of the artificial denture tooth, the artificial denture tooth may have the natural color. Since the two-color molded article surrounds the one-color molded article, the two-color molded article is erupted from the one-color molded article so that monomer hazardous to the human body is not discharged, thereby ensuring the safety of the human body.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial tooth and a method of manufacturing the artificial tooth,

The present invention relates to an artificial tooth capable of realizing the color of a natural tooth. More particularly, the artificial tooth is manufactured using an injection mold, It is about safe artificial teeth that do not release harmful substances.

Generally, an artificial tooth is used when restoring an implant, denture or missing tooth.

Artificial teeth are mainly made of zirconia, ceramic, or acrylic resin teeth. Artificial teeth used in the past have different methods of manufacturing the front teeth (canines) and molar teeth.

A brief description of how to make a two-color or three-color front teeth with a sharp tip is as follows.

After viewing the data sent from the dentist, we made a frame using gypsum. In this frame, the worker mixes the thermosetting resin, the powdered polymer, with the liquid monomer at a certain ratio, and then the mixture is manually cut into the compression mold The mold was heated to produce an artificial tooth.

The conventional method will be described in detail as follows.

As shown in FIG. 1, in order to squeeze the natural color of the artificial tooth, three to five colors may be superimposed on each other to form a collar, and a process for manufacturing an artificial tooth using three colors As follows.

A mold manufacturing process in which a compression mold is manufactured for each color so that a color can be squeezed by superimposing three colors in order to form a natural color of an artificial tooth,

In order to put the molds into molds manufactured by the mold making process of the above-mentioned compression mold, a mixture of a polymer made of powder of thermosetting resin of each color and a monomer made of liquid is mixed at a constant ratio to prepare a mixture fair,

The mixture prepared by the preparation process of the mixture is injected into the primary mold, the mixture of the primary color is introduced into the primary mold and the upper mold is closed,

A molding step of placing the compression mold into which the mixture is put into a thermoforming machine and heating and molding the same,

After the mold is finished by the molding process, the mold is cooled, the upper mold is removed, the mold is taken out, the mold is removed, the molding is put into the mold of the second color, the mixture of the second color is placed on the mold, Secondary molding process for molding with thermoforming machine.

After completion of the molding by the secondary molding process, the secondary mold is cooled, the secondary upper mold is removed, the molding is taken out, the barrel is removed, the molding is put into the mold of the third color, A third molding process in which a mixture of colors is placed and the upper mold is joined and molded by a thermoforming machine.

After the third molding process is completed, the barie removing process is performed to cool the mold, open the upper mold, pull out the artificial teeth, and remove the barie.

However, artificial teeth manufactured by the manufacturing process have a disadvantage in that a long time is required because a metal mold is separately manufactured for each color, a thermosetting resin is molded for each metal mold, and the color of the artificial tooth is achieved through various steps.

In addition, since the artificial teeth are manufactured by using the mold in manufacturing the artificial teeth, the conventional method has a disadvantage in that the thickness of each interlayer tooth can not be controlled because a parting line is defined in a mold for manufacturing an artificial tooth.

In other words, in order to realize the same color as a natural tooth during the production of a tooth, when the thickness of each layer is thick, it is impossible to mix various colors because there is a tooth thickness. It is difficult and difficult to implement accurate colors.

In other words, in order to realize the same color as a natural tooth during the production of a tooth, when the thickness between the layers is thin, it is necessary to increase the number of molds per each color, The work is inconvenient and takes a long time.

In this way, conventionally, since artificial teeth are formed by laminating a mixture of several layers in order to realize a color such as a natural chihuahua of a patient, it is disadvantageous in that the operation cost is inconvenient, difficult, and takes a long time.

 Therefore, when the artificial teeth are manufactured by the conventional method, there is a problem in that the manufacturing cost is expensive, and the patient has a problem in that the cost of the expensive dental prosthesis is spent in repairing the dentures or lost teeth

Meanwhile, in order to manufacture a conventional artificial tooth, an artificial tooth was prepared by mixing and kneading a mixture of a polymer and a monomer at a constant ratio to form a mixture, placing the mixture in a mold, and applying heat to react.

However, since the above method is the same as compression molding when a mold is manufactured using gypsum,

/ Color can not be formed.

In other words, the production of artificial teeth made of resin requires the preparation of total 28 teeth in the upper / lower jaw and the tooth shape (width and height) is different for each person. Therefore, .

Therefore, although artificial teeth have been manufactured using a master batch in the related art, there is a problem that precision of the artificial teeth is poor.

Another method of using the mold is described as follows.

Polymer and monomer are weighed and mixed at a constant ratio to make a mixture, and this mixture is put into the mold by hand, and the mold is pressed and primary molded.

After the formed artificial tooth is formed as described above, the mold is opened and the mixture of the colors is put in order to express the color of the tooth again, and the molded body is secondarily molded.

When the artificial teeth are formed in the second order as described above, the mold is opened, and then the ceramic in the kneaded state is inserted again and the third step is performed to complete the artificial teeth.

However, the above method has a problem in that it is difficult to adjust the exact ratio by metering and mixing the polymo and the monomer with the human hands every time the work is performed.

In this case, when the polymer is polymerized in a state in which the content ratio of the polymer and the monomer is not precise, the monomers are harmful to the human body. Therefore, the person using the artificial tooth continues to inflow harmful substances to the human body.

In other words, it is not accurate by the operator to mix the mixture by hand at the high temperature, and when the polymer and the monomer are not mixed at the correct ratio, the harmful component is generated in the monomer, which is harmful to the human body.

As described above, although a plurality of artificial teeth are manufactured at one time using a mold, all the steps must be manually performed by a worker, which requires a long working time and mass production, .

In addition, the molar teeth, the top of the food contact with the maxillary or mandibular teeth is wide and irregular grooves are formed, so the mold was impossible to date.

Since the above-mentioned front teeth are mainly used as a cutting function rather than chewing food, it is possible to manufacture a mold in a smooth shape in which the upper surface touching the maxillary or mandibular teeth is curved as a whole without a curved groove, So it is inconvenient to make an artificial tooth through various molding.

Recently, as shown in Figs. 1 and 2, a method of manufacturing molar teeth using a mold (Korea Patent No. 10-0907130 entitled: Acetal Single Polymer Injection Molding Cigarette for Children) was invented.

That is, in the state where the upper and lower dies are coupled, the liquid injected from the injection machine is injected through the cavity and then molded. When the artificial teeth are formed, the upper mold is separated and the artificial tooth is pushed up from the lower mold through the ejector .

However, the above method can not be produced when a side surface of an artificial tooth is flexible for a child and it can be manufactured by using a hard ceramic material such as an adult tooth.

Therefore, it is possible to realize the color of natural teeth, and there is a growing demand for a safe artificial tooth.

Korean Patent Registration No. 10-0907130

It is an object of the present invention to enable various resin artificial teeth manufactured using an injection mold to realize a color close to that of a natural tooth, and for the additional purpose of the present invention, There is an additional purpose in this.

In order to attain the above object, the present invention provides a method for forming a prosthetic tooth, comprising the steps of: forming an upper part of an artificial tooth having a groove on a plane to chew food, and a side part formed into a curved shape, The manufacturing part line is bent sideways with respect to the both side portions of the front side of the teeth along the upper side portion of the artificial teeth so that the molar artificial tooth is moved horizontally from the upper side to the side and lowered from both sides to bend the part line to the lower front side A method of manufacturing an artificial tooth formed by injection molding using a two-color injection molding machine

A one-color injection-molded product prepared by mixing a mold made of a mixture of a polymer and a monomer in the inside of the mold, and a color mixture And a resin injection hole is formed at the center of the bottom of the one-color injection molding.

According to the configuration of the present invention as described above, the color of the natural tooth can be realized by adjusting the interval between the one-color injection-molded article and the two-color injection-molded article of the artificial teeth, and the two-color injection- Which is a very useful invention that is safe for the human body by preventing the release of a monomer that can harm the human body due to elution from the one-color injection molding.

1 is a schematic perspective view showing a conventional compression mold;
2 is a schematic perspective view showing a state in which a first thermosetting resin is put in a conventional compression mold.
3 is a schematic perspective view showing a state in which a conventional first thermosetting resin is molded.
4 is a schematic perspective view showing a state in which a secondary thermosetting resin is put in a conventional primary molding
5 is a schematic perspective view showing a state in which a secondary thermosetting resin is molded in a conventional primary molding.
FIG. 6 is a schematic block diagram showing a case where a mold for artificial tooth preparation for molar teeth is opened according to the embodiment of the present invention
FIG. 7 is a schematic block diagram showing a state in which the mold for artificial tooth preparation for the front teeth according to the embodiment of the present invention is closed; FIG.
FIG. 8 is a schematic block diagram showing a state in which a mold for artificial tooth preparation for a front tooth is opened according to an embodiment of the present invention. FIG.
FIG. 9 is a schematic block diagram showing a state in which a mold for artificial tooth preparation for molar teeth is closed according to an embodiment of the present invention. FIG.
10 is a schematic perspective view showing the parting line of the artificial tooth of the present invention
11 is a schematic side cross-sectional view of an artificial tooth for molar teeth according to the present invention
12 is a cross-sectional view showing a hole for fixing a resin tooth of an artificial tooth capable of realizing a hue of a natural tooth according to the present invention

In order to attain the above object, the present invention provides a method of manufacturing an artificial tooth, comprising the steps of forming an upper part of an artificial tooth having an upper surface of an artificial tooth formed with grooves on a plane to chew food, The part line is bent along the upper side of the artificial tooth along the side of the front side of the teeth to move the molar artificial tooth from the upper side to the side in the horizontal direction and descend from both sides to bend the part line from the upper side to the lower side A color injection mold formed by injecting a mixture made of a mixture of a polymer and a monomer into the mold and pressing the mold, and a color injection mold After the preparation, the mold was opened and a color mixed horn Color extrusion molding, and a resin tooth fixing hole is formed at the center of the bottom of the one-color injection-molded article.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 6 is a schematic perspective view showing an artificial tooth according to an embodiment of the present invention, FIG. 9 is a schematic block diagram showing a mold for manufacturing an artificial tooth for molar teeth according to an embodiment of the present invention, The shaping portions 11 and 21 for forming an artificial tooth are formed in the coupling portions of the upper and lower dies 10 and 20 so that the part liner 3 is inserted into the teeth of the molar artificial tooth 1 shown in Fig. And then descending from both sides to the front of the molar artificial tooth.

As described above, when the parting lines 3 are formed in the metal molds 10 and 20 for molar machining, there is no undercut, so that separation after injection molding is easy.

That is, when the upper and lower molds 10 and 20 are installed in a two-color injection molding machine and then injection is performed, a deep color is injection-molded inside the artificial tooth 1, and at the same time, By injection molding, the artificial teeth can be manufactured in various colors by the operator.

When the injection molding is completed by the two-color injection molding machine in a state where the upper and lower dies 10 and 20 are coupled as described above, the upper and lower dies 10 and 20 are separated, When the artificial tooth is pushed by the ejector, the front face of the artificial tooth is opened. Therefore, even if there is an undercut in the artificial tooth, the artificial tooth 1 is moved upward by the ejector, Separated.

FIG. 11 is a cross-sectional view showing a one-color injection-molded article and a two-color injection-molded article of an artificial tooth capable of realizing a hue of a natural tooth according to an embodiment of the present invention. Referring to FIG. 3, Forming portions 11 and 21 are formed inside the upper and lower molds 10 and 20 for forming an artificial tooth and the upper surface of the artificial tooth 1 and the side surface portion formed in a curved arc shape, ) Are bent sideways with respect to the both side portions of the front side of the teeth along the upper side of the side of the artificial tooth 1 to move the teeth of the molar artificial tooth horizontally from the upper side of the back side to descend from both sides, ), Which is injection-molded using a two-color injection molding machine, in which a mixture made of a mixture of a polymer and a monomer is placed in the mold, and the mold is pressed The present invention relates to a one-color extrusion molding (100) manufactured by molding a one-color injection-molded product (100) and a mold And a resin-tooth fixing hole 110 is formed at the center of the bottom of the one-color injection-molded article 100. The resin injection-

In particular, the interval (i) between the 1-color injection-molded article 100 and the 2-color injection-molded article 200 is preferably 0.5 to 1.2 mm, which is an interval for expressing the hue of natural teeth.

12 is a cross-sectional view showing a hole for fixing a resin tooth of an artificial tooth capable of realizing a color of a natural tooth according to an embodiment of the present invention. Referring to FIG. 12, the resin tooth fixing hole (H) of 2 to 7 mm and a diameter (d) of 1 to 2.5 phi.

Therefore, it is possible to realize the color of a natural tooth by adjusting the interval between the 1-color injection-molded article and the 2-color injection-molded article of the artificial tooth. Due to the structure in which the 2-color injection-molded article surrounds the 1-color injection molded article, (Monomer), which is harmful to the human body, is not released, which is a very useful invention that is safe for human body.

1: molar artificial tooth 3:
10, 20: Upper mold 11, 21: Molding part
100: Primary injection molding 110: Resin tooth fixing hole
200: Secondary injection molding
i: spacing h: height
d: diameter

Claims (6)

(11) and (21) are formed inside upper and lower molds (10) and (20) for artificial teeth, each of which has an upper surface of an artificial tooth (1) (3) for artificial teeth are bent sideways along the upper side of the side of the teeth of the artificial tooth (1), and the molar artificial teeth are horizontally moved from the upper side to the side, (3) is bent upward and downward from the lower part of the front surface, thereby forming a color of a natural tooth injection-molded using a two-color injection molding machine. A one-color injection molded product 100 manufactured by putting a mixture made of a mixture of a polymer and a monomer in a mold and pressing the mold; and the mold 10 and 20 after the one-color injection molded product 100 is manufactured, Color injection molded product 200 manufactured by molding a mixed mixture of colors to express the hue of the color injection molded product 100. The resin injection hole 110 is formed at the center of the bottom of the one- The artificial teeth capable of realizing the color of natural teeth. 3. The method of claim 2,
Wherein an interval (i) between the 1-color injection-molded article (100) and the 2-color injection-molded article (200) is 0.5 to 1.2 mm. 3. The method of claim 2,
Wherein a height h of the resin tooth fixing hole 110 formed in the one-color injection-molded article is 2 to 7 mm and a diameter d is 1 to 2.5φ. The method according to claim 1,
The bottom is wide enough to be fixed to the top of the dentures, implants and lost teeth. The upper end portion is formed with molded portions 31 and 41 inside the left and right molds 30 and 40 for manufacturing sharp-edged canine artificial teeth 50 so as to cut food, (3 ') is curved to the left and to the right with respect to the front and rear center portions of the canine, and injection molding is performed using a two-color injection molding machine. 3. The method of claim 2,
An artificial tooth capable of realizing a color of a natural tooth, characterized in that the mixture for forming an artificial tooth is made of a thermoplastic resin.

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