Nabors ED, Kremchek TE: Bilateral rupture of the extensor mechanism
of the knee in healthy adults.
Overall, the investigators noted a higher complication rate in total knee arthroplasty in post-patellectomy patients, including subluxation of the extensor mechanism
, infection, and supracondylar fractures.
As with any patellofemoral salvage procedure, the extensor mechanism should be normally aligned at the time of patellectomy.
The original descriptions of the procedure did not include strict criteria, technical pitfalls were not yet appreciated, and little emphasis was placed on realignment of the extensor mechanism of the knee.
Reconstruction of the extensor mechanism
after proximal tibia endoprosthetic replacement.
51) The intent of the operation was to diminish the Q angle and effectively medialize the extensor mechanism to correct lateral tracking of the patella.
Hughston and Walsh (59) reported satisfactory results using a technique for reconstruction of the extensor mechanism that combines many aspects of other procedures.
9) Part of the selection criteria for a hamstring autograft as a graft material for this case was based on the desire to limit further violation of the knee extensor mechanism