Allograft reconstruction for extensor mechanism injuries.

Area of Science:

• Orthopedic Surgery
• Biomaterials in Medicine
• Musculoskeletal Reconstruction

Background:

• Extensor mechanism disruption can lead to significant functional deficits.
• Allograft tissue has been previously reported for successful extensor mechanism reconstruction.
• Restoring extensor power is crucial for patient mobility and activity levels.

Purpose of the Study:

• To evaluate the efficacy of allograft for extensor mechanism reconstruction.
• To assess the restoration of extensor power and return to high activity levels post-reconstruction.
• To determine the functional outcomes and complication rates associated with allograft use.

Main Methods:

• Retrospective review of 17 patients (18 knees) undergoing allograft reconstruction (Achilles or patellar tendon) between 2000-2007.
• Clinical and radiographic evaluation at a minimum 24-month follow-up for 14 patients (15 knees).
• Patient-reported outcomes assessed using IKDC, Tegner, Lysholm, KOOS, Noyes, and SF-12 questionnaires.

Main Results:

• Median follow-up was 52 months; 12/14 patients had prior surgeries.
• Postoperative median scores: IKDC 74, Tegner 8, Lysholm 62, KOOS pain 92, KOOS sport 50, SF-12 physical 43.
• All patients achieved straight leg raise; 5/14 had an average 8-degree extensor lag. No infections or reruptures occurred.

Conclusions:

• Allograft reconstruction is an effective salvage procedure for extensor mechanism deficits.
• It can restore extensor power and facilitate a return to relatively high activity levels.
• This technique offers a viable solution for complex cases with a low complication rate.