Patent ID: 8167882

Claim:
A miller assembly for creating a cavity in a bone, the cavity (i) having a cross section which has a generally triangular profile having a first side generally parallel with an axis of the bone and a second side forming an acute angle with the first side, and (ii) being contiguous with a pre-existing conical cavity in the bone, the assembly comprising: a cutter; and a frame for carrying the cutter, the frame including (i) a connection portion having a longitudinal axis, (ii) a laterally extending flange adapted to operationally couple a proximal end of the cutter to the connection portion, in which the flange includes a top gear on the top of the flange, and (iii) a cutter mount for mounting the cutter at a first angle approximating the acute angle with respect to the longitudinal axis of the connection portion, the cutter mount extending at the first angle from the longitudinal axis of the connection portion and configured to receive a portion of the cutter and maintain the received cutter oriented at the first angle during rotation, and the frame further including a handle configured to form a portion of a drive joint for coupling the frame to a drill, the handle having a longitudinal axis; wherein the longitudinal axis of the handle is coincident with the longitudinal axis of the connection portion, wherein the flange includes a bottom gear that engages the top gear on the flange, such that the bottom gear rotates when the top gear is rotated; wherein the handle includes a gear at a distal end, the gear of the handle being coupled to the top gear; wherein the cutter includes a gear that engages the bottom gear; and wherein the connection portion and the cutter are fully inserted in the bone after the connection portion is inserted into the pre-existing conical cavity in the bone.