Method for manufacturing endodontic instruments
AssigneeUltradent Products, Inc.
InventorsPaul Lewis, Barry L. Hobson
Life of this patent
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Abstract
A method of manufacturing endodontic files involves a chemical milling process to yield endodontic files having a desired taper. The process involves the steps of (a) providing a metallic rod having a cutting portion with a polygonal cross section; (b) torsioning the rod so as to form helical cutting surfaces in the cutting portion of the metallic rod; and (c) chemically milling the cutting portion of the rod so as to taper the cutting portion. The rod may be formed of any desirable metallic material, for example stainless steel or a nickel-titanium alloy.
Claims30
A method of manufacturing an endodontic instrument for use in performing an endodontic procedure, comprising:
- (a) forming an intermediate instrument having a cutting portion by at least one of (i) torsioning a metallic rod having a polygonal cross section or (ii) cutting, grinding, laser micromachining, machining, or grit blasting a metallic rod;
- and
- (b) chemically milling at least said cutting portion of said intermediate instrument so as to yield an endodontic instrument having a desired taper.
A method of manufacturing an endodontic instrument for use in performing an endodontic procedure, comprising:
- (a) torsioning a metallic rod having a polygonal cross section so as to form an intermediate instrument having a cutting portion with helical cutting edges in said cutting portion;
- and
- (b) chemically milling at least said cutting portion of said intermediate instrument so as to yield an endodontic instrument having a desired taper.
A method of manufacturing an endodontic instrument for use in performing an endodontic procedure, comprising:
- (a) forming an intermediate instrument having a cutting portion from a metallic rod, at least said cutting portion formed by at least one of cutting, grinding, laser micromachining, machining, or grit blasting;
- and
- (b) chemically milling at least said cutting portion of said intermediate instrument so as to yield an endodontic instrument having a desired taper.
Dependencies are inferred from the claim text.