Massive femoral osteolytic lesion secondary to disengagement of a total knee tibial locking pin: case report.
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.
NYU-Hospital for Joint Diseases, Department of Orthopedic Surgery, New York, NY, USA.
Sathappan S
SS
Sathappan
Craig
C
Capeci
Matthew
M
Teicher
Paul E
PE
Di Cesare
D018771:Arthralgia / Q000209:etiology / Q000601:surgery; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects* / Q000295:instrumentation; D001858:Bone Nails / Q000009:adverse effects*; D005269:Femur / Q000000981:diagnostic imaging* / Q000601:surgery; D005548:Foreign-Body Migration / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D007593:Joint Instability / Q000209:etiology / Q000601:surgery; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010015:Osteolysis, Essential / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation