Patent ID: 8568142

Claim:
A cable endodontic file, comprising: a cable comprising at least seven substantially identical strands of metal wire each having substantially equal diameter and substantially equal lengths, and having six of said strands helically wound around the seventh strand, thereby forming said cable having a proximal end, a distal end and an axis of rotation extending from said distal end to said proximal end; a cutting head fixedly attached to the distal end of said cable, said cutting head having at least one flat cutting surface oriented in a plane containing said axis of rotation; a handle comprising a metal tube enclosing part of said cable and being fixedly attached to the proximal end to said cable, and wherein the unenclosed portion of the cable extends at least one third of the length of the combined cable and the enclosing metal tube, and a pilot tip located proximate to the distal end of said cutting head, said pilot tip being a spherical cap having a base diameter substantially equal to the diameter of said cable.