Patent ID: 9579108
Date: 2017-02-28
CPC Classifications: A61B

Claim:
1. A surgical drill bit configured to form a hole in an anatomical structure, the surgical drill bit comprising: an elongate cylindrical body portion that defines a proximal end, a distal end spaced from the proximal end along a central axis, and at least one flute that extends helically about the central axis from the distal end to the proximal end, the body portion further defining a cutting segment configured to at least partially form the hole in the anatomical structure when the drill bit rotates in a first direction of rotation about the central axis, and a guiding segment that is proximal to the cutting segment, the cylindrical body further defining: a first outer profile at the cutting segment, the first outer profile defining a first bearing surface that is spaced from the central axis by a first length that substantially defines a radius of the hole, the first bearing surface having a first circumferential length, and a second outer profile at the guiding segment, the second outer profile defining a second bearing surface having a second circumferential length that is less than the first circumferential length, the second outer profile further defining a leading edge that is: 1) spaced from the central axis by a second length, and 2) spaced from the second bearing surface in the first direction of rotation, wherein the second length less than the first length.