High-intensity low-modulus metastable beta titanium alloy tooth arch wire

A technology of β-titanium alloy and dental arch wire, which is applied in the field of dental orthopedic devices, can solve the problems of high tensile strength, low elastic modulus, etc., and achieve high tensile strength, moderate orthodontic strength, and elastic retraction range big effect

Inactive Publication Date: 2014-03-12
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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Problems solved by technology

However, up to now, there is no titanium alloy tooth with low elastic modulus, high tensile strength and good plasticity, which can provide the long-lasting and gentle correction force required by orthodontics, and meet the displacement required by mid- and long-term orthodontics. Archwires are reported

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  • High-intensity low-modulus metastable beta titanium alloy tooth arch wire

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Embodiment Construction

[0016] The nominal chemical composition of the metastable β-titanium alloy dental arch wire of the present invention is calculated by mass percentage: Mo11%, Nb3%, Zr5%, Sn4%, and the balance is titanium and unavoidable impurities.

[0017] The manufacturing method of metastable β titanium alloy dental arch wire of the present invention is: first carry out weighing raw material according to the nominal chemical composition Ti-11Mo-3Nb-5Zr-4Sn of metastable β titanium alloy, after mixing uniformly, press into smelting electrode, and The smelting electrode is subjected to vacuum consumable arc melting twice to obtain an alloy ingot, and then the alloy ingot is subjected to billet forging and repeated upsetting and drawing forging to obtain an alloy bar according to a conventional process, and then the alloy bar is hot-rolled and drawn to obtain a tooth The arch wire is finally subjected to heat treatment for shaping, and finally a metastable β titanium alloy dental arch wire prod...

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Abstract

The invention provides a high-intensity low-modulus metastable beta titanium alloy tooth arch wire which is characterized by comprising the following nominal chemical components in percentage by mass: 11 percent of Mo, 3 percent of Nb, 5 percent of Zr, 4 percent of Sn and the balance of titanium and unavoidable impurities. The tooth arch wire provided by the invention has good biocompatibility, high tensile strength, low elastic modulus, a wide elastic range and excellent resilience; moreover, the orthodontic force of the high-intensity low-modulus metastable beta titanium alloy tooth arch wire is lower than that of a stainless steel wire, but is higher than that of a nickel-titanium alloy wire, the elastic modulus of the high-intensity low-modulus metastable beta titanium alloy tooth arch wire is only one fourth to one third of that of the stainless steel wire, and the high-intensity low-modulus metastable beta titanium alloy tooth arch wire has a wider elastic range and a wider orthodontic displacement range than the stainless steel wire. Utilization of the tooth arch wire provided by the invention can obtain the stable and mild orthodontic force and durable and moderate displacement and can realize larger displacement of teeth without replacing an orthopedic wire or only by replacing the orthopedic wire a little.

Description

technical field [0001] The invention belongs to the technical field of dental orthopedic instruments in the department of stomatology, and in particular relates to a metastable beta titanium alloy dental arch wire with high strength and low modulus. Background technique [0002] Tooth deformity is widespread, and orthodontics can play a role in beauty and reduce dental diseases, and it is increasingly loved by people. Orthodontics is to achieve the purpose of tooth deformity correction through tooth movement (displacement), so that the teeth are arranged neatly, aligned up and down, and tooth looseness is reduced and avoided. The metal wires currently used for orthodontics (orthodontic wires, also called dental arch wires) are mainly nickel-titanium alloy wires and austenitic stainless steel wires. Nickel-titanium alloy wire has the characteristics of shape memory and superelasticity, soft and durable correction force, wide displacement range, and is currently the most wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00A61C7/20
Inventor 牛金龙于振涛余森麻西群贺新杰刘少辉张亚峰韩建业皇甫强袁思波
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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