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Molded article for dental use

A molding and dental technology, used in dental prostheses, dentistry, dental preparations, etc., can solve the problem of not finding the replacement raw material of polycarbonate for braces

Inactive Publication Date: 2005-12-28
NISSIN DENTAL PROD INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, until now, no polycarbonate alternative material has been found that can meet the performance of temporary braces, and the same is true for denture bases or dentures.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Comparison results of various physical properties between the copolyester resin constituting the dental molding of the present invention and conventionally used resins (polycarbonate resin and polyethersulfone resin)

[0027] The grades of resins used in the experiments are as follows.

[0028] Invention product 1: Eastar 6763 manufactured by Eastman Chemical

[0029] (PET / PCT molar ratio > 1.0)

[0030] Invention product 2: Eastar DN004 manufactured by Eastman Chemical

[0031] (PET / PCT molar ratio<1.0)

[0032] Conventional product 1: Polycarbonate resin (commercially available grade for injection molding)

[0033] Conventional product 2: Polyethersulfone resin (commercially available grade for injection molding)

[0034] 1) Detection test of environmental hormone substances (endocrine disrupting substances)

[0035] Test method: 200 ml of pure water was added to 5.6 g of the molded body made of the above resin, and immersed at 60...

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PUM

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Abstract

It is intended to provide a molded article for dental use which is highly safe and free from the elution of bisphenol A with a fear of causing endocrine disruption and can fulfill the properties required in dental crowns of provisional use, denture bases, artificial teeth, dental corrective devices, etc. Namely, a molded article for dental use having a definite shape to be used in the oral cavity which is made of a copolymer polyester resin comprising a polyethylene terephthalate (PET) constitutional unit and a poly-1,4-dimethylene cyclohexane terephthalate (PCT) constitutional unit. Different from commonly employed PET, the above resin has been made amorphous by 1,4-cyclohexane dimethanol (CHDM) and therefore has a characteristic that a highly transparent molded article having excellent mechanical properties can be obtained therefrom by various molding methods (injection molding, compression molding and vacuum molding).

Description

technical field [0001] The present invention relates to a dental molding that does not have to worry about elution of bisphenol A, is safe, and satisfies various necessary physical properties required for temporary braces, denture bases, dentures, and the like. Background technique [0002] So far, in the field of dentistry, polycarbonate has been used as a raw material for producing materials for denture bases, temporary braces, and the like. Polycarbonate is a thermoplastic having an aromatic polycarbonate bond, and has excellent engineering properties (mechanical properties, heat resistance, cold resistance, etc.). [0003] However, in recent years, it has been pointed out that bisphenol A and the like cause endocrine disturbance as an environmental hormone problem, and polycarbonate widely used in the dental field is due to i) synthesis of bisphenol A as a starting material, and ii) formation of bisphenol by hydrolysis. For reasons such as A, this has been seen as a pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C13/087A61C7/00A61C13/00A61C13/08A61K6/00A61K6/083A61K6/884A61K6/891C08G63/183C08G63/199
CPCA61C7/00A61C13/0001A61C13/081A61C13/087C08G63/199A61K6/891C08L67/02
Inventor 菱本宗光
Owner NISSIN DENTAL PROD INC