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Molded body for dental use

A molding and dental technology, applied in the direction of dental prosthesis, dentistry, dental preparations, etc., can solve unknown problems and achieve the effects of easy bending, excellent impact resistance, and good formability

Active Publication Date: 2014-02-26
NISSIN DENTAL PROD INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the utilization of this polyester resin in various dental moldings such as aesthetic dentures is still unknown.

Method used

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  • Molded body for dental use
  • Molded body for dental use
  • Molded body for dental use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Synthesis example of polyester resin constituting the dental molding of the present invention

[0034]In a 500ml flask equipped with a nitrogen injection port, a metal stirrer and a short distillation column, 77.7g of dimethyl terephthalate, 48.5g of 1,4-cyclohexanedimethanol, 2,2,4,4- A mixture of 17.9 g of tetramethyl-1,3-cyclobutanediol and 0.046 g of dibutyltin oxide. The flask was placed in a Wood metal bath which had been heated to 210°C. The stirring speed was set at 200 RPM throughout the experiment. The contents of the flask were heated at 210°C for 5 minutes, then the temperature was slowly raised to 290°C over 30 minutes. The reaction mixture was kept at 290° C. for 60 minutes, and then vacuum was slowly drawn over 5 minutes after the pressure inside the flask reached 100 mmHg. Then, the pressure inside the flask was further lowered to 0.3 mmHg over 5 minutes. The pressure of 0.3 mmHg was maintained for a total of 90 minutes to remove excess un...

Embodiment 2

[0035] Embodiment 2: physical property comparative experiment

[0036] Various physical property comparison experiments were carried out between the polyester resin constituting the dental molded article of the present invention and conventionally used resins (polyamide resin, polyester resin, and polycarbonate resin). The resins used in the experiments are as follows.

[0037] Product of the present invention: the polyester resin produced in the above-mentioned Example 1

[0038] Existing product 1: Polyamide resin (commercially available thermoplastic resin for denture bases)

[0039] Existing product 2: Polyester resin (commercially available thermoplastic resin for denture bases)

[0040] Existing product 3: Polycarbonate resin (commercially available thermoplastic resin for denture bases)

[0041] 1. Bending strength, bending modulus of elasticity test

[0042] Using the resins of the present invention and conventional products 1 to 3, test bodies conforming to ISO207...

Embodiment 3

[0084] Example 3: Specific examples of the dental molding of the present invention (1) Aesthetic dentures

[0085] A material in which 0.015 parts by weight of titanium oxide, 0.0005 parts by weight of solvent red 151, 0.002 parts by weight of red iron, and 0.001 parts by weight of black iron oxide were mixed with 100 parts by weight of the polyester resin produced in Example 1 above was prepared. The mixture is molded with a dental injection molding machine to produce denture bases for aesthetic dentures.

[0086] It was confirmed that the denture base produced in this way has moderate flexibility, is not easy to break, is also excellent in impact resistance, and has no problem at all when it is mounted and used by a patient.

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Abstract

Provided is a molded body for dental use, said molded body being made from a polyester resin which exhibits excellent fracture resistance and moderate suppleness as a material for esthetic dentures and which ensures excellent polishability in making a denture and has such alkali resistance that a denture made from the resin does not suffer any fracture due to cleaning. This molded body for dental use comprises a polyester resin which is composed of a dicarboxylic acid component that contains terephthalic acid residues and a glycol component that contains 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues and 1,4-cyclohexanedimethanol residues, wherein the contents of terephthalic acid residues, 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues and 1,4-cyclohexanedimethanol residues in the polyester resin are 30 to 70 mol%, 5 to 25 mol%, and 25 to 50 mol%, respectively.

Description

technical field [0001] The present invention relates to a molded article for dentistry, which has moderate flexibility, excellent crack resistance, abrasiveness and alkali resistance, and can also satisfy aesthetic dentures, denture bases, artificial teeth, temporary crowns, and dental moldings. Various necessary physical properties required for CAD / CAM blocks, restorations, and orthodontic appliances. Background technique [0002] The original purpose of dentures is to improve the lost chewing function and restore the psychological state. However, existing partial dentures lack aesthetics and are limited in terms of restoration of psychological status. On the other hand, partial dentures (= aesthetic dentures) that do not have metal clasps and are integrated with denture bases and clasp arms can be said to be effective not only for functional improvement but also for the recovery of psychological conditions. Also effective as a prosthetic. [0003] In recent years, aesth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/087A61C5/08A61C7/00A61C13/007A61C13/01A61C13/087A61K6/00A61K6/884A61K6/891
CPCA61C5/08A61C13/087A61C13/0022A61C13/01A61C5/70A61K6/891A61C5/77
Inventor 菱本宗光加藤叶子
Owner NISSIN DENTAL PROD INC