Patent ID: 9199310
Filing Date: 2015-12-01
Classification: B22F,C22C

Abstract:
1. A method for producing an endodontic instrument comprising: producing NiTi (nickel-titanium) to form nano-grained wire(s), the producing including: preparing a mixture of 54-57% wgt nickel (Ni) powder and 43-46% wgt titanium (Ti) powder and wherein the average particle size of the nickel particles and the titanium particles is approximately 30-40 μm (micrometers); sintering said mixture for about four (4) hours at about 1000° C. and mechanically compacting for about ten (10) hours the mixture of nickel and titanium powders to produce a nano-grained NiTi alloy with a grain size of about 20 nms; forming a nano-grained wire(s) with a length of about 20-35 mms and an amount of taper ranging from approximately 2% to 12% of the nano-grained NiTi alloy and wherein the diameter of the instrument body decreases toward the tip of the instrument; and heat treating the nano-grained wire at about 450°-550° C. to achieve a desired combination of mechanical properties.