Patent ID: 6419488
Filing Date: 2002-07-16
Classification: A61C,B23B

Abstract:
An endodontic dental instrument for extirpating and enlarging a root canal, comprising:an elongate working portion having a length of from about 3 to about 18 millimeters, a peripheral diameter ranging from about 0.08 millimeters to about 1.9 millimeters, at least one helical flute, at least one tissue-removing edge, and at least one outer helical land portion, the helical flute and helical land portion each having a pitch ranging from about 1 spiral per 16 millimeters to about 1 spiral per millimeter; and a chisel tip at an end of said working portion, said chisel tip portion comprising a plurality of facets which intersect along a chisel edge, said facets intersecting said working portion at respective tissue-removing edges disposed at the periphery of said working portion, said tissue-removing edges being unequally spaced about said periphery.