1. Patient positioning with knee in 20° flexion |
2. Midline approach extending from 2 cm proximal to palpable defect to distal patella |
3. Subcutaneous dissection and tendon exposure |
4. Identification of the gap, debridement of nonviable tissue |
5. Preparation of a trapezoidal recipient site in the native patella |
6. Drilling of two 2.4-mm tunnels in the patella deeper than the previously created socket; Kirschner wire passage |
7. Preparation of an Achilles tendon bony allograft on the back table to match the inverted trapezoidal shape created in the patella |
8. Allograft insertion and fixation with Kirschner wires |
9. Side-to-side native tendon–allograft suture |
10. Layered closure |