Method for forming nickel/titanium braided arch wires

Details Method for forming nickel/titanium braided arch wires Method for forming nickel/titanium braided arch wires

1990-05-30

1992-01-14

Mancene, Gene

Dentistry

Orthodontics

Means to transmit or apply force to tooth

A61C 300

Patent

active

050805843

ABSTRACT:
An orthodontic arch wire exhibiting relatively constant force over range of deflection of 0.8-1.8 mm and resiliently returnable to its initial position from flexure up to 90.degree. is formed from a braid of nickel/titanium alloy. In the process for making the arch wire, eight strands of the alloy are initially formed into a braid of circular cross section which is then deformed into a rectangular cross section. The deformed braid is wound about a fixture, is heated treated on the fixture and thereafter cut to produce a pair of arch wires from each coil about the fixture. The nickel/titanium alloy is one having a nominal composition of 55% nickel and 45% titanium.

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patent: 4386909 (1983-06-01), Hanson
patent: 5018969 (1991-05-01), Andreiko et al.

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