JPS62240044A - Method for molding shell for repairing discolored tooth cosmetics - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (a) Purpose of the Invention (Field of Industrial Application) The present invention provides a shell for cosmetic restoration of teeth discolored due to ingestion of chemicals, excessive smoking of cigarettes, etc. Concerning a molding method.

<Prior art> Teeth in the oral cavity have the main function of chewing food, and of course also play an important role in vocalization and pronunciation.
It is common knowledge that beauty and ugliness of the face and good or bad facial expressions are closely related. In particular, the shape and color of the labial surface of the anterior teeth have long been one of the important points that determine the beauty and ugliness of a person's face, as the expression ``clear teeth'' has been used for a long time.

However, in actual teeth, it is difficult to maintain healthy, beautiful, white teeth for a long period of time without cavities or other lesions. We often see on a daily basis that there are many cases in which people develop an ugly color tone due to factors such as tetracycline used at a young age, etc., and also due to aging.

In such cases, the discolored state of the tooth surface, especially the labial surface of the anterior tooth (hereinafter referred to as the labial surface), which is easily visible to the human eye, may be completely removed.
It is only natural that there is a desire to restore teeth to a state that is close to the natural shine and color of natural teeth without having to do much cutting.

Conventionally, several methods have been known as means for removing or covering such discoloration of the lip surface, preventing or improving subsequent discoloration, and enhancing aesthetics cosmetically.

In other words, remove the labial surface to some extent and apply (1) there.
A thin, ready-made shell-like covering material made of ceramics (porcelain), plastic resin, etc. and shaped like the labial surface of a tooth is bonded.

(2) Ceramic paste made of powder and liquid is built up on the model surface, fired to create a shell-like product, and then glued together.

(3) Similar to the method used to create a cast tooth crown using metal, a shell-shaped object made by the casting method using ceramics is bonded.

(4) A chemically polymerized or photopolymerized resin or composite resin that adheres to the tooth substance is directly applied to the tooth surface in the oral cavity, and after polymerization and hardening, it is formed and polished to repair and repair the lip surface. Forms a protective shell (film).

methods, etc.

<Problems to be Solved by the Invention> However, these methods have the following drawbacks, which hinder their widespread practical application.

That is, in the case of (1) above, when creating a ready-made shell with a lip shape by machining or other means, it is extremely difficult to make the shell as thin as possible while maintaining sufficient strength.
There is a limit to how thin the shell can be, so it is inevitable to make it thicker. Therefore, if the amount of the labial surface of the tooth to be restored increases, or if the shell surface protrudes from the labial surface of the adjacent tooth, it becomes difficult to properly match the tooth to its surroundings.

In the case of (2), the powder liquid is extremely thin, for example 0.3 t.
.

It is almost impossible to bake below. On top of that,
Firing takes time and effort, requires complicated techniques and procedures, and requires skill, which increases costs.

In the case of (3), ceramics are cast, but since the lost wax method is used, the thinness that can be achieved is limited to about 0.4 gourd, and the procedure is complicated and requires a high level of skill.
It takes time and money.

In the case of (4), since the polymerization proceeds in the oral cavity, the temperature cannot be raised and it is difficult for the resin to polymerize completely, so the original strength cannot be obtained and the durability is insufficient. Furthermore, it is known that residual monomers have an adverse effect on tooth quality and pulp, which is not desirable.

Therefore, the present invention has developed a lip surface that is relatively durable and effective in maintaining a natural appearance over a long period of time. The object of the present invention is to provide a method for molding a repair shell.

(OL Structure of the Invention <Means for Solving the Problems>) The method of the present invention generally consists of the following constituent elements in order to achieve the above object.

The key point is to use a ready-made thin plate of inorganic or organic material that is biosafe, high strength, homogeneous, thin and uniform in thickness, and has the same shape as the tooth to be restored and is heat resistant. A ceramic or synthetic resin thin plate is heated and softened by burner heating or other means, and is pressed and attached to the model lip to completely take the shape of the same surface. After blending, cool. The ceramic or synthetic resin thin plate formed in this way is removed from the model, molded, formed into a ceramic or synthetic resin shell, and finally straddles the inorganic cement. It is extremely easy to lightly scrape and reshape the surface and its adjacent surroundings, significantly reducing the time and effort required for repair and reducing the financial burden on the patient.

The specific process is as follows.

(1) Figure 1fa) (Referring to bl and Figure 2,
The labial surface 2 of the tooth to be repaired, often the front tooth, is further removed 3. However, depending on the case, it may not be necessary to remove it. The depth of removal is determined by taking into consideration the thickness of the ceramic thin plate 5-1 used for repair, the thickness of the adhesive, and other treatment conditions. (In many cases, 0.2 to 0.3
It is about va. ) (2) Referring to Figure 3 fal, take an impression of the tooth using an appropriate impression material, and based on the impression, create a model 4 of the tooth using phosphate-based investment material or other fire-resistant model material. Create.

(3) According to Figure 3 (bl), it is a material with a uniform thickness of about 0.2 m, such as a cover glass for a microscope sample, and a seismic angle of about 10 or so. ,
The material is biologically safe and has high strength ready-made ceramic thin plates (including hard glass plates) 5-1, 5-2, etc. are prepared. As for the shape of the ceramic thin plate, in addition to the thin flat plate 5-1 as described above, there is also a milk ceramic thin plate 5-2 which has been curved in advance to approximate the shape of the tooth surface to some extent.
You may also use In addition, the material of the thin plate is not specified as long as it is compatible with the purpose and handling of the present invention, but general glass-based materials, silicate (Si02)-based materials, and alumina-porcelain materials that are inorganic and do not cause harm to living organisms may be used. ,
Various materials such as apatite-based materials can be used.

(4) With reference to FIGS. 4 and 5, place the ceramic thin plate 5-1' described in the previous item (3) on the lip surface of the model 4 obtained in the previous item (2), and place the gas burner 6 Heat this with etc.
Soften. Depending on the case, each may be heated separately and stacked on top of each other.

After cutting the thin ceramic plate 5-t as shown in FIG. Let it blend in.

(5) The ceramic thin plate that has been adjusted to the shape of the model lip is cooled, and its periphery is cut to match the shape of the model lip to create a shell of an appropriate size.

(6) Referring to FIG. 6, the shell 5'-xi:
It is removed from the model and attached to the patient's labial surface to be repaired using cement 8 that adheres to both ceramics and tooth structure.

(Force: Adjust the occlusal relationship and complete the process by modifying the shape, polishing, etc. as necessary.

The above process is also possible using a synthetic resin thin plate, and a controlled electric heating method suitable for the synthetic resin,
It can be molded by applying a pressure method. Suitable materials for this type of processing include synthetic resin 11,4 and thin plate materials such as vinyl chloride.

In the above item (4), for hot forming the ceramic thin plate S-t, as shown in Figures (7) (a) and (b), upper and lower molds 4.4 having the required shape are used. Thin plate 5-1 between
It is also possible to soften and mold the material by heating it, for example, in a heating furnace such as an electric furnace. This method is also convenient for use in molding synthetic resin sheets.

Among the above processes, in order to completely hide the discoloration of the labial surface and to match the color of the surrounding teeth, such as adjacent teeth, a thin ceramic plate is used to achieve a color close to the desired color.
It is sufficient to use a cement having the necessary color tone for shell adhesion, or to use opaque (dedicated for concealing the base color) cement +-1- in some cases. When using a synthetic resin material, it is possible to use a material that has a color similar to that of the tooth substance, such as milky white, making it relatively easy to perform a restoration that matches the color tone of the surrounding teeth.

<Example> Tetracycline-discolored teeth of an elderly woman were repaired using a ceramic screw mold constructed by the method described above. The color tone was extremely well restored, the tooth matched well with the adjacent teeth, and the esthetics were significantly improved. Looking at the current progress six months later, there are particularly significant changes, deterioration, nonconformity,
It does not suffer from any fractures, and is fully functional, much to the delight of patients.

(C) Effects of the Invention The method of molding a shell for cosmetic repair of discolored tooth surfaces according to the present invention involves heating a ready-made high-strength inorganic material such as a porcelain thin plate, a glass thin plate, or a synthetic resin thin plate, by applying it to a mold and heating it. This is a method of softening and deforming to form a shell that fits the tooth surface, making it possible to repair and reproduce ultra-thin tooth surfaces that would be unimaginable with conventional methods. Therefore, the amount of tooth surface removal is zero or extremely Only a small amount is required, and the method is simple, can be repaired in a short time, is economical, and has sufficient durability, so it is extremely effective in practical use.

Furthermore, the object of the present invention is not limited to discolored teeth, but is naturally applicable and effective in restoring aesthetics when natural teeth exhibit an unfavorable color tone. .

[Brief explanation of drawings]

Fig. 1 al (b), Fig. 2, Fig. 3 (al), Fig. 4 to Fig. 6 are views of the present invention, the molding process of a shell for cosmetic restoration of discolored teeth, and the installation diagram of the shell, Fig. 3 1b + is a cross-sectional view of the shell material, Fig. 7(a) Tb)
shows another means of shell molding. ■... Discolored tooth, 2... Labial surface, 3... Deletion layer, 4... Teeth model, 5-1... Ceramic thin plate, 6... Gas burner, 7... Pressing tool , 8...cement. Agent Patent Attorney Eiji 1) Hiroshi - Figure 1 Figure 3 Procedural amendment 1, case indication 1985 Patent Application No. 84171 2, title of invention 3, person making the amendment Relationship with the case Representative of the patent applicant Shosuke Otsuka 46 Agent 107 Address 3B Calm Building, 8-4-7 Akasaka, Minato-ku, Tokyo
6. Detailed description of the invention increased by amendment 1. The scope of the claims is amended as follows. 1. Take an impression of the surface of a tooth that is discolored or has an undesirable color tone by scraping or not scraping the surface, and then apply a biological material to the required parts of a tooth model made from a fire-resistant model material based on the impression. A thin plate of safe, strong, and uniform inorganic or organic material that softens at high temperatures is applied to the surface.
A method for forming a shell for cosmetic restoration of discolored teeth, which is characterized by heating and softening the shell to adhere and conform to the tooth surface of a model, cooling it, or cutting it and peeling it off. 2. The "Detailed Description of the Invention" column is amended as follows. (1) Lines 3 to 6 of page 5 of the specification shall be amended as follows. In the case of (4), powder, liquid, or a mixture of paste and paste is applied directly to the tooth surface in the oral cavity, so a uniformly thin film with sufficient strength and opacity can be obtained. Furthermore, with chemical polymerization, polymerization occurs in the oral cavity, so the polymerization temperature cannot be raised, making it difficult for the resin to polymerize completely, making it impossible to obtain the original strength. (2) Page 6, line 8 of the specification, "Cool."
The following explanation is added between "in this way" and "in this way". ``Also, among the synthetic resin thin plates mentioned above, for photopolymerizable synthetic resin thin plates (including composites) that have plasticity, apply the thin plate to the tooth surface of the model in the same manner, and press the thin plate against the tooth surface by hand or using an appropriate push tool. After blending, it is irradiated with light for the required time to polymerize and harden.In this case, the model may be one made using ordinary modeling materials such as ordinary plaster.'' (3) Same page 8 In line 14, "using 6" is corrected to "using 7". (4) Add the following explanation between "Can be done" and "This kind of processing..." in the 8th line of the 9th page. "Also, when molding using a thin plate of photopolymerizable synthetic resin (including composite resin) that has plasticity,
In this case, the model may be made from an ordinary model material such as plaster - simply place the material on the surface and press it with your fingers or other suitable pressing tool to blend it with the tooth surface, then irradiate it with light. That's fine. (5) On the 11th line of the same page, amend "vinyl chloride, etc." to "thin plate materials such as vinyl compounds such as vinyl chloride, or those resin materials containing photopolymerization initiators." (6) Add the following explanation between lines 17 and 18 on page 9. ``Also, with thin sheets of plastic photopolymerizable synthetic resins (including composite resins), it is sufficient to simply clamp them between the upper and lower molds and pressurize them.''
Correct ``+12'' to ``r(1) 27o female anterior dentist''. (8) Add the following explanation between lines 16 and 17 of the same page. r (21 A photopolymerized composite resin thin plate consisting of BisMEPP, 3G, camphorquinone, NN dimethylamine ethyl methacrylate, and 7-lysate filler was applied to a pathologically discolored upper front tooth of a 2143-year-old man. After lightly grinding the tooth surface, The resulting shell was bonded to the tooth using resin cement and cured by irradiating it with visible light. Most of the pathological discoloration was masked, and the tooth became a color similar to that of a healthy tooth. The aesthetics have been significantly improved.Although four months have passed now, the condition at the time of restoration has been maintained, indicating that it is highly practical.''+91 Page 11, line 2, ``Molding Since it is a method of forming,
Alternatively, for a thin sheet of plastic photopolymerizable synthetic resin (including composite resin), simply press it against the mold and it will deform and conform to the tooth surface, creating a shell that conforms to the tooth surface and photo-curing. So,” he corrected.

Claims (1)

[Claims] 1. Take an impression of the surface of a tooth that is discolored or has an undesirable color tone by scraping or not scraping the surface, and then apply a biological material to the required parts of a tooth model made from a fire-resistant model material based on the impression. A thin plate of safe, strong, and uniform inorganic or organic material that softens at high temperatures is applied to the surface.
A method for forming a shell for cosmetic restoration of discolored teeth, characterized by heating and softening the thin plate to make it adhere to and conform to the tooth surface of the model, and after cooling, cutting and peeling the thin plate to match the shape of the tooth surface of the model.