Patent ID: 9314316
Filing Date: 2016-04-19
CPC Classification: A61C,B21F,C22C,C22F,C23C,C25F,Y10T

Claim Text:
1. A method for manufacturing or modifying an endodontic instrument for use in performing root canal therapy on a tooth, the method comprising: (a) providing an elongate shank having a cutting edge extending from a distal end of the shank along an axial length of the shank, the shank comprising a superelastic nickel titanium alloy, and (b) after step (a), heat-treating the entire shank at a temperature from 300° C. up to but not equal to the melting point of the superelastic nickel titanium alloy, wherein the heat-treated instrument has an angle greater than 6 degrees of permanent deformation after torque at 45° of flexion when tested in accordance with ISO Standard 3630-1.