Tooth for dental arch model and method of producing the same

A technology of models and teeth, which is applied in the field of manufacturing, can solve problems such as difficult-to-cut carious parts, and achieve the effects of reducing dust inhalation, easy experience formation, and suppressing stains

Inactive Publication Date: 2009-06-24
SHOFU INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] Although the removal of caries is an important treatment in dental treatment, the carious part is softer than the usual dentin part, so it is difficult to cut the carious part

Method used

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  • Tooth for dental arch model and method of producing the same
  • Tooth for dental arch model and method of producing the same
  • Tooth for dental arch model and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0225] Use 1 kg of alumina pellets (Al 2 o 3 : 26%, SiO 2 : 44%, average particle size: 0.25 μm, stearic acid: 30%) were injection molded in a tooth-shaped mold to obtain an injection molded body.

[0226] The resulting injection molded body having the shape of the enamel portion was degreased, and then sintered (1,300° C., residence time: 10 minutes) to obtain a sintered body 1-1.

[0227] 1 kg of alumina pellets for CIM (Al 2 o 3 : 26%, SiO 2 : 44%, average particle size: 3.0 μm, stearic acid: 30%) were injection molded in a tooth-shaped mold to obtain an injection molded body.

[0228] The resulting injection molded body having the shape of the dentin portion was degreased and sintered (1,000° C., residence time: 10 minutes) to obtain a sintered body 1-2.

[0229] 1kg of CIM was made of alumina pellets (Al 2 o 3 : 68%, SiO 2 : 2%, average particle size: 0.3 μm, stearic acid: 30%) were injection molded in a tooth-shaped mold to obtain an injection molded body.

[0...

Embodiment 2

[0260] In order to examine the effect of the amount of binder on the shrinkage of the sintered body during pellet making, sintered bodies 5 and 6 were made in the same manner as in Comparative Example 1 except that the amount of stearic acid was changed to 18%.

[0261] In the sintered bodies 5 and 6, the enamel portion and the dentin portion were sufficiently bonded, and the cutting feeling of both the enamel portion and the dentin portion was similar to a natural tooth.

[0262] It has been found that cracking or chipping during cutting caused by differences in thermal expansion and contraction upon firing between dentin and enamel can be prevented by controlling the amount of binder during pellet making.

Embodiment 3

[0264] The enamel and dentin portions of the sintered bodies 1-1, 1-2, 2-1, and 2-2 produced in the same manner as in Example 1 were bonded using low-melting glass powder, and then the cutting feeling was checked.

[0265] IP9021 (low melting point glass, sintered at 575° C.) manufactured by Heraeus K.K. was used as the glass powder to obtain sintered body 7 , and IP9049 (low melting point glass, sintered at 610° C.) was used to obtain sintered body 8 .

[0266] table 3

[0267] Adhesiveness Cutting feeling debris Sintered body 7 C B C Sintered body 8 C B C

[0268] A: Good results similar to natural teeth were obtained.

[0269] B: Although sufficient adhesion can be confirmed, chipping partially occurs.

[0270] C: Excellent when compared with conventional teeth.

[0271] Regarding adhesiveness, dentin and enamel are bonded to form an integral material. Although a cutting feel similar to that of natural teeth was obtained, cracks occur...

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PUM

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Abstract

A tooth to be used in a dental arch model with which dental students can conduct dental works in the oral cavity and practice treatments. More specifically, a tooth composition for formation trainings such as anchor tooth formation and cavity preparation. Since conventionally used dental arch models have cutting properties different from natural teeth, dental students having completed formation trainings such as anchor tooth formation and cavity preparation by using these conventional models are frequently puzzled to have different cutting and handling properties upon dental works in the oral cavity in practice. That is, these conventional dental arch models are largely different from natural teeth in cutting properties including the slipperiness and easiness in cutting. A tooth for a dental arch model simulating the enamel texture and the dentin texture constituting a natural tooth whereby even the difference in cutting properties between the enamel texture and the dentin texture constituting a natural tooth can be reproduced by forming at least the enamel part with the use of a baked inorganic powder such as alumina.

Description

technical field [0001] The present invention relates to a tooth for a dental arch model, by which a dental student can experience dental work in the oral cavity and practice treatment. The tooth for the dental arch model is a tooth for simulating the treatment procedure in the oral cavity or practicing treatment using the dental arch model at the university. The present invention relates to a tooth used for experience formation training such as abutment tooth formation and cavity preparation by cutting teeth, and a method of manufacturing the same. Background technique [0002] In dental practice, extracted human and animal teeth are traditionally used to experience the cutting feel of natural teeth. However, there are hygiene issues associated with extracted teeth, and infection can develop if adequate hygiene controls are not practiced. It is thus impossible to freely perform training. In addition, since extracted teeth include natural living material, they cause decay ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C13/08A61C13/09A61C13/00
Inventor 门林勇生佐藤浩一吉本龙一
Owner SHOFU INC
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