SURGICAL BUR WITH PLURAL FLUTES AND A GROOVE, THE GROOVE FORMED IN A SINGLE ONE OF THE FLUTES AND SPACED AWAY FROM THE DISTAL END OF THE BUR

摘要

A bur with features that minimize the application of substantially identical forces to the tissue against which the bur is applied. One of these features is a single groove located in a single one of the flutes. The groove is formed in the flute so as to be spaced proximally away from the distal end tip of the bur head. Another feature is that, adjacent the distal end tip of the bur head, the clearance surfaces of the flutes extend outwardly different distances from the longitudinal axis through the bur head. Another feature is that the flutes extend in a helical pattern around the bur head and the angle of the helix varies along the longitudinal axis of the bur head.

主权项

1. A bur for surgical/medical use, said bur including:
a shaft having opposed proximal and distal ends, said shaft having a proximal section adjacent the proximal end shaped for coupling to a surgical handpiece capable of rotating said shaft; and a head attached to the distal end of said shaft, said head having: a tip that is the most distal portion of the head; a longitudinal axis that extends proximally from the tip through said bur head; and a plurality of flutes, each said flute having a rake surface and a clearance surface, the rake surface and clearance surface meeting at a cutting edge, wherein a single one of said flutes is formed with a groove that extends from the rake surface to the clearance surface, wherein the groove is spaced proximally from the tip of said head so as separate the cutting edge of the said flute in which said groove is formed into a distal section located distal to the groove and a proximal section located proximal from the groove.