Therapy of chronic extensor mechanism deficiency after total knee arthroplasty using a monofilament polypropylene mesh.

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Abstract

Conflict of interest statement: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. 9. Orthopedics. 2024 Sep-Oct;47(5):e273-e276. doi: 10.3928/01477447-20240809-14. Epub 2024 Aug 20. Re-revision Extensor Mechanism Reconstruction Because of Nonunion and Tendon Failure After Total Knee Arthroplasty. Krieg B, Dayton M, Alfonso N. Extensor mechanism (EM) disruption after total knee arthroplasty (TKA) is devastating, especially in cases of re-rupture. A 67-year-old man with diabetes had patellar tendon rupture after revision TKA and then had migration of the bone block after Achilles tendon allograft with bone block (ATBB) augmentation with cerclage. A third reconstruction was performed with open reduction and internal fixation and high-strength braided suture augmentation. Five months postoperatively, the patient had regained full range of motion with intact EM and hardware. The risk of re-rupture is high in ATBB, and the primary issues in this case were nonunion and tendinous compromise. A construct that encompasses compression and buttressing of the bone block with tendon augmentation potentially addresses the risks of recurrent EM rupture in more complex cases. [Orthopedics. 2024;47(5):e273-e276.]. DOI: 10.3928/01477447-20240809-14