Patellar prostheses and instrumentation

摘要

Instrumentation for preparation of a bone includes a first guide having a first collet and a second collet. The first and second collets are formed around divergent first and second axes, and share a common opening. A bone preparation instrument may be inserted into each of the collets toward a bone. A second guide may be carried in the first guide, and a bone preparation instrument inserted through the second guide toward the bone, along a third axis.

主权项

1. A system for preparing a bone, the system comprising:
a first guide, the first guide comprising:
a first collet comprising a first opening, the first collet having a proximal end and a distal end, a first bore extending therethrough between the first opening at the proximal end and the distal end of the first collet along a first axis, the first bore is radially centered about the first axis;a second collet comprising a second opening separate from the first opening, the second collet having a proximal end and a distal end and a second bore extending therethrough between the second opening at the proximal end and the distal end of the second collet along a second axis, the second bore is radially centered about the second axis, and the second collet comprising a guide slot extending along at least a portion of the second collet, the guide slot further comprising a guide track, wherein the first bore and the second bore intersect and partially overlap one another at each of the distal ends of the first and second bore; and wherein the first and second axes diverge away from one another at an angle as the first axis extends from the distal end to the proximal end of the first collet and the second axis extends from the distal end to the proximal end of the second collet; and a second guide receivable within the guide slot of the first guide and having an axial rail and a third bore, wherein the third bore is centered about a third axis, wherein the third axis is non-parallel to the first axis and the second axis when the second guide is received within the guide slot, and wherein the axial rail is receivable in the guide track along a straight path to secure the second guide within the guide slot in a selected orientation; and the system further comprising a clamping apparatus having a first clamp arm connected to a second clamp arm, wherein the first guide is attached to at least one of the first and second clamp arms of the clamping apparatus, and the clamping apparatus is actuable to increase and decrease a distance between the first clamp arm and the second clamp arm, thereby increasing and decreasing a distance between the first guide and a corresponding one of the first and second clamp arms.