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J Knee Surg 2007; 20(3): 241-244
DOI: 10.1055/s-0030-1248050
Case Report

© 2007 Thieme Medical Publishers

Massive Femoral Osteolytic Lesion Secondary to Disengagement of a Total Knee Tibial Locking Pin

Sathappan S. Sathappan, Craig Capeci, Matthew Teicher, Paul E. Di Cesare
  • NYU–Hospital for Joint Diseases, Department of Orthopedic Surgery, New York, NY
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Publication History

Publication Date:
20 January 2010 (online)

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ABSTRACT

The Anatomic Modular Knee (AMK; Depuy, Warsaw, Ind) was one of the first designs to incorporate a modular locking mechanism for the tibial insert; fixation was secured using a screw-in tibial tray-locking pin. This case report describes a patient who presented with instability and worsening knee pain 15 years following a primary total knee arthroplasty using the AMK prosthesis. Radiographs and intraoperative assessment revealed proximal migration of the tibial tray-locking pin into the medial femoral condyle resulting in a large osteolytic defect.