Preparation method of NiTi alloy tooth arch wire for orthodontics

A dental arch wire and alloy wire technology, which is applied in the field of preparation of NiTi alloy dental arch wire for orthodontics, can solve the problems of low bonding strength of film base, uneven pigment dispersion, and low corrosion resistance, and achieve mechanical properties and biological Excellent compatibility, high bonding strength of film base, and reduced corrosion resistance

Inactive Publication Date: 2015-11-04
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of NiTi alloy arch wire for orthodontics, aiming to solve the problems of low film-based bonding strength, TiO 2 Problems of uneven pigment dispersion and low corrosion resistance

Method used

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  • Preparation method of NiTi alloy tooth arch wire for orthodontics

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preparation example Construction

[0022] figure 1 The implementation process of the method for preparing the NiTi alloy arch wire for orthodontics according to the embodiment of the present invention is shown. The preparation method of the NiTi alloy arch wire for orthodontics provided by the embodiment of the present invention, the specific method steps are as follows:

[0023] 1) Surface pretreatment of NiTi alloy wire: remove the scratches on the surface of the alloy wire, then put it into a container filled with alcohol, perform ultrasonic cleaning at room temperature, and finally put it in an alkaline solution to remove the surface contamination layer;

[0024] 2) Preparation of electrolyte: Mix 250g / L sodium gluconate, 100mL / L phosphoric acid and 45mL / L hydrogen peroxide at a volume ratio of 1:1:1, stir until fully dissolved, prepare electrolyte, and set aside;

[0025] 3), NiTi alloy wire anodizing: put the NiTi alloy wire pretreated in step 1) into the electrolyte solution prepared in step 2), and car...

Embodiment 1

[0040] The preparation method of the NiTi alloy arch wire for orthodontics in this embodiment is carried out according to the following steps:

[0041] 1) Surface pretreatment of NiTi alloy wire: use 400#, 600#, 800#, and 1200# sandpaper to polish the wire until there is no obvious scratch on the surface, then put it into a beaker filled with alcohol, and put it in a beaker at room temperature Ultrasonic cleaning for 20 to 30 minutes, and finally put into 5mol / L NaOH solution to remove the surface contamination layer. In this embodiment, the purity of the alcohol used is ≥99%;

[0042] 2), preparation electrolyte: 250g / L sodium gluconate (C 6 h 11 NaO 7 ), 100mL / L phosphoric acid (H 3 PO 4 ) and 45mL / L hydrogen peroxide (H 2 o 2 ) according to the volume ratio of 1:1:1, mixed and stirred until fully dissolved, configured as an electrolyte solution, and set aside;

[0043] 3), NiTi alloy wire anodizing: the NiTi alloy wire pretreated in step 1) is wound with a copper wir...

Embodiment 2

[0047] The preparation method of the NiTi alloy dental arch wire for orthodontics in this embodiment is the same as that in Embodiment 1, except that when the NiTi alloy wire is anodized, the DC power supply voltage is 40V, and the oxidation time is 40 min.

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Abstract

The invention discloses a preparation method of a NiTi alloy tooth arch wire for orthodontics. The preparation method comprises the steps of: 1) surface pretreatment of a NiTi alloy wire; 2) preparation of electrolyte; 3) anodizing of the NiTi alloy wire; 4) coating of transparent epoxy resin/polytetrafluoethylene varnish by a dip coating method; and 5) high-temperature curing treatment and final obtaining of the NiTi alloy tooth arch wire having invisible double-layer protection. Compared with a traditional method, the preparation method can effectively prevent such problems as nonuniform dispersion of TiO2 pigment in organic high molecular emulsion and reduction of coating mechanical performance and corrosion resistance caused by TiO2; and in addition, the method has such advantages as low cost and adaptation to batch production.

Description

technical field [0001] The invention relates to the field of biomedical materials used for human body hard tissue replacement and repair, in particular to a preparation method of NiTi alloy dental arch wire for orthodontics. Background technique [0002] Because NiTi alloy wire has excellent shape memory and superelastic properties, good corrosion resistance and biocompatibility, it can provide soft and long-lasting correction force in the process of dental restoration treatment, and it has become the first choice for orthodontic arch wire . However, the nickel element in NiTi shape memory alloy accounts for about 50%. If it is used directly, there is a possibility of nickel ion precipitation, which will reduce the proliferation and adhesion of gingival osteoblasts and fibroblasts, and even cause symptoms such as allergy and poisoning. Usually surface coating or modification methods are used to prepare functional coatings with a thickness of nanometer to micrometer on the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/34C09D163/00C09D127/18A61C7/20
Inventor 单迪何鑫玉方长青邵晖
Owner XIAN UNIV OF TECH
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