The final treatment of femur side

The final treatment of femur side

The final treatment of the femur side can be done after the tibial side, in order to better confirm the gap balance between knee extension and knee flexion.

The PS Box resection guide should be placed at the center or slightly lateral. Then the medial condyle fracture can be avoided, and improve the tracking of the patella. Must avoid placing it medial.

Femoral intercondylar fractures may occur during TKA (total knee arthroplasty). Because the knee prosthesis with PCL (posterior cruciate ligament) replacement requires to remove some intercondylar bone, too much bone removal directly leads to stress increase and bone defects, resulting in the occurrence of distal femoral fractures. The relationship between bone remove inadequately and fracture risk is unclear. 

JUST's SKI knee joint system uses intercondylar lapping to remove bone, effectively removing intercondylar bone, while avoiding intercondylar fracture. Methods of operation as follows: 

1.Impact the PS Box resection guide on the prepared distal femur. (fig.1)

2. Secure the box resection guide with two 3.2mm drill pins through the holes located in the anterior flange. (fig. 2)

3. Insert the appropriate size reamer into a power drill. Insert the tip of the reamer into the central hole in the posterior axle of the box resection guide. Under power, rotate the reamer around the axle anteriorly into the box guide. Repeat this step with the reamer inserted in both the medial and lateral positions. (fig. 3)

4. Take off the Box resection guide. (fig. 4)

Circular corner can save 5% bone mass, at the same time, reduce the high stress caused by the square corner.