| 主权项 |
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 and a guiding segment that is proximal to the cutting segment, wherein the at least one flute defines: a first outer profile at the cutting segment, the first outer profile defining a first leading edge that is configured to cut into bone and, and a first bearing surface that extends from the first leading edge such that both the first leading edge and the first bearing surface are spaced from the central axis by a first length that substantially defines a radius of the hole, and a second outer profile at the guiding segment, the second outer profile defining i) a second leading edge that is spaced from the central axis by a second leading edge length that is less than the first length, ii) a second bearing surface that is spaced from the central axis by a second bearing length that is greater than the second leading edge length, and iii) a substantially straight leading surface that is connected between the second leading edge and the second bearing surface. |
