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Orthodontic composite material and preparation method thereof

A composite material and orthodontic technology, applied in the field of medical materials, can solve the problems of insufficient elastic recovery force in mechanical properties, insufficient effect, insufficient stress teeth, etc.

Active Publication Date: 2021-10-08
东南大学泰州生物医药与医疗器械研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Technical problem 1): The prepared material does not have sufficient elastic recovery force in terms of mechanical properties, that is, there is not enough stress to correct teeth;
[0008] Technical problem 2): After soaking in water and aging, the mechanical properties of the material have changed, so that there is not enough correction force to maintain long-term correction, and the effect is not good enough

Method used

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  • Orthodontic composite material and preparation method thereof
  • Orthodontic composite material and preparation method thereof
  • Orthodontic composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1-10

[0072] The components and contents are as follows:

[0073]

[0074] in,

Embodiment 1-3

[0075] The preparation method of embodiment 1-3 is as follows:

[0076] 1) All raw materials are dried and pretreated. The drying temperature of PETG, polycarbonate and ethylene vinyl acetate copolymer is 70°C, the drying temperature of chain extender and light calcium carbonate is 45°C, and dry for 7 hours;

[0077] 2) Select surface-treated light calcium carbonate, chain extender and ethylene vinyl acetate copolymer for melt blending and granulation;

[0078] 3) blending and melting the granules obtained in step 2) and polycarbonate together;

[0079] 4) melt blending and granulating polyethylene terephthalate-1,4-cyclohexanedimethanol and the pellets obtained in step 3);

[0080] 5) Melting and granulating the pellets in step 4) again to obtain a composite material for orthodontic correction.

[0081] In steps 2), 3), 4) and 5), the melt extrusion process adopts a twin-screw extruder to extrude.

[0082] The twin-screw extruder is the KET-20 twin-screw extruder of Nanjin...

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Abstract

The invention provides a composite material for orthodontic treatment of teeth. The composite material is made of the following components as raw materials: 70-85 parts by weight of polyethylene terephthalate-1,4-cyclohexane Alkanedimethanol ester (PETG); 5-30 parts by weight of polycarbonate; 5-20 parts by weight of ethylene vinyl acetate copolymer; 0.1-0.5 parts by weight of chain extender; 0.1-2 parts by weight light calcium carbonate. In the present invention, by blending and modifying three kinds of materials, adding a chain extender and light calcium carbonate at the same time, the composite material has more excellent stability during extrusion and has a good display effect. Orthodontic materials perform better in terms of mechanics, with sufficient orthodontic force, smaller stress relaxation rate, and slower decay of mechanical properties of materials; at the same time, they have excellent light transmittance and haze, and sufficiently low saliva water absorption. In particular, it has very good elastic recovery rate; at the same time, it has very good chemical stability and better aging stability.

Description

technical field [0001] The invention relates to a tooth orthodontic correction composite material and a preparation method thereof, belonging to the technical field of medical materials. Background technique [0002] Removable appliances and fixed appliances are currently the most commonly used methods in traditional orthodontic methods. Their operating techniques are very mature, and their clinical orthodontic effects are also very good. Traditional orthodontic appliances, namely fixed orthodontic appliances, can control the movement of teeth from three dimensions to achieve the ideal orthodontic effect, while movable orthodontic appliances only apply force to the teeth at one point, and the tooth displacement is single, and the orthodontic effect is average. Both removable and fixed appliances have their own advantages and scope of application in the field of malocclusion correction. Traditional orthodontic appliances made of alloy materials affect the patient's diet, app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L69/00C08L23/08C08K3/26
CPCC08K2003/265C08L67/02C08L2203/02C08L2205/03C08L69/00C08L23/0853C08K3/26
Inventor 顾兴中姚磊全祎
Owner 东南大学泰州生物医药与医疗器械研究院
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