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Teeth orthodontic material, preparation and application thereof

An orthodontic and dental technology, which is applied in the field of transparent polymer orthodontic materials for braces, can solve the problems of high polymer materials without high mechanical strength, poor orthodontic effect, and insufficient orthodontic stress

Inactive Publication Date: 2016-02-10
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some studies have also been carried out on polymer materials for orthodontic treatment in China. For example, Chinese patent application CN02139224.2 uses ultra-high molecular weight polyethylene to make dental orthodontic brackets. Large mechanical strength, so that the stress generated during the orthodontic process is not enough, resulting in poor orthodontic effect
However, the water absorption rate (or saliva absorption rate) and stress relaxation rate of orthodontic materials made of this material still need to be further reduced

Method used

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  • Teeth orthodontic material, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] The PETGA was placed in a vacuum drying oven at 65°C for 6h.

[0110] The nano silica (SiO 2 A) Dry in a vacuum drying oven at 100°C for 2 hours, add the dried nano-silica into anhydrous ethanol in a three-necked flask, stir and disperse for 15 minutes, and then add ethanol containing 4% silane coupling agent KH-550 In the solution, place the mixed solution in an ultrasonic cleaning machine for 60 minutes, then transfer it to another three-necked flask, heat and stir at 78°C and reflux for 2 hours, filter with suction, wash with ethanol, and place it in a vacuum drying cabinet at 80 Dry for 2h at ℃, grind and sieve. The surface-modified nano-silica with an average particle size of 5nm-60nm was dried in a vacuum oven at 105° C. for 2 hours to obtain a surface-treated and dried nano-silica A.

[0111] Combine the dried PETGA, the surface-treated and dried nano-silica A, antioxidant 1010 (Zibo Xiangdong Chemical Co., Ltd.) and auxiliary antioxidant 626 (Beijing Wanfuda Fine Ch...

Embodiment 2

[0114] Repeat Example 1, the difference is: replace the material fed into the extruder with dried PETGB, surface-treated and dried nano-silica B with an average particle size of 40nm-60nm, antioxidant 1010 (Zibo Xiangdong Chemical Co., Ltd.) and auxiliary antioxidant 626 (Beijing Wanfuda Fine Chemical Factory) 99.5 / 0.5 / 0.3 / 0.06 mixture.

[0115] Various performance tests were performed on the obtained dried hot-pressed film film. The results are shown in Table 1.

Embodiment 5

[0123] The polycarbonate B was dried in a blast dryer at 110°C for 8 hours.

[0124] Repeat Example 1, the difference is: replace the materials fed into the twin-screw extruder with: dried PETGB, dried polycarbonate B, surface treated and dried nano silica A, anti 68.95 / 29.55 / 1.5 / 0.3 / 0.06 mixture of oxygen agent 1010 (Zibo Xiangdong Chemical Co., Ltd.) and auxiliary antioxidant 626 (Beijing Wanfuda Fine Chemical Factory).

[0125] The obtained dried hot-pressed film film was subjected to various performance tests, and the results are shown in Table 1.

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Abstract

The invention relates to a teeth orthodontic material. On the basis of the total weight of the orthodontic material, the orthodontic material includes, by weight: A) 50-99.7% of polyethylene glycol terephthalate-1,4-cyclohexanedimethanol ester; B) 0-40% of polycarbonate, C) 0-20% of a thermoplastic polyurethane elastomer; and D) 0.3-5% of nano silicon dioxide, the sum of percentage contents of the components is 100 wt%. The teeth orthodontic material has excellent transparent performance, is excellent in mechanical and chemical performances, satisfies sanitary grade, especially is low enough in water absorption rate (or saliva absorption rate) and stress relaxation rate. The invention also relates to preparation of the teeth orthodontic material and an application of the material for preparing a teeth orthodontic device which preferably is dental braces.

Description

Technical field [0001] The invention relates to a material for orthodontic treatment of teeth, in particular to a transparent polymer orthodontic material for orthodontic treatment of teeth. The invention also relates to a preparation method and application of the material. Background technique [0002] Orthodontics is the treatment of malocclusion deformity through orthodontics or surgery. Malocclusion is the deformity of teeth, jaws, and craniofacial and uneven teeth caused by congenital or acquired factors during the growth and development of children. [0003] Uneven teeth can cause many problems. First of all, it seriously affects the normal function of the oral cavity, which mainly affects our chewing, pronunciation, swallowing, and breathing functions. Secondly, it seriously affects the health of periodontal tissues and oral hygiene. Uneven dentition, especially crowded teeth, on the one hand makes oral plaque easy to adhere, on the other hand, because the toothbrush is dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L69/00C08L75/06C08L75/08C08K13/06C08K9/06C08K3/36C08K5/134A61C7/00
Inventor 丁雪佳苏昱朱杰克刘燕琴白玉兴方东煜张宁
Owner BEIJING UNIV OF CHEM TECH
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