Posterior Stabilized Femur Resection

1. Flex the knee to approximately 90° and center the P/S housing resection block on the distal femur. (To assist, the housing resection blocks have the same M-L dimension as the implants.)

Note: The only difference between the cruciate retaining and the posterior-stabilized femoral components is the addition of the housing for the cam mechanism. All other box dimensions are the same. The anterior and posterior chamfer resections can be made through the posterior stabilized housing resection block.

2. Secure with 1/8" trocar pins through the straight holes in the front of the block. If the chamfer cuts are made through this block, the angled holes in the sides of the block should be used.
3. Attach the P/S housing resection collet to the housing resection block. (Figure 19)
4. Attach the housing reamer dome and P/S reamer sleeve to the patellar reamer shaft.
5. Ream through the housing resection collet until the automatic depth stop contacts the collet and then move the reamer anterior and posterior until it contacts the automatic stops.
6. Impact the housing box chisel through the housing resection collet to square the corners of the housing. The housing box chisel should be used anteriorly and posteriorly to ensure that the full length of the box is prepared. (Figure 20)
7. If the chamfer resections have not been made, they can now be made by cutting through the chamfer slots in the housing resection block.