Patent ID: 8821500

Claim:
A cutting block assembly for resecting a distal femur, the cutting block assembly comprising: a first block having: a first surface on an anterior side of the first block providing a first guiding surface for making an anterior chamfer cut on the femur; and a second surface on a posterior side of the first block providing a second guiding surface for making a posterior chamfer cut on the femur, the second surface being angled with respect to the first surface; a second block adapted to detachably couple to the first block, the second block having: a first surface on an anterior side of the second block providing a first guiding surface for making an anterior cut on the femur; a second surface on a posterior side of the second block providing a second guiding surface for making a posterior cut on the femur; a first inferior surface; and a second inferior surface angled with respect to the first inferior surface; and an interlocking mechanism including: one or more protrusions extending from each of the first and second inferior surfaces of the second block on opposite sides of an anterior-posterior axis of the cutting block assembly; and one or more holes extending into each of the first and second surfaces of the first block, each of the one or more holes being aligned with one of the one or more protrusions along a superior-inferior axis of the cutting block assembly, wherein the second block interlocks with the first block by sliding the one or more protrusions into the one or more holes to securely engage a substantial portion of the first and second guiding surfaces of the first block with a substantial portion of the first and second inferior surfaces of the second block.