4-YEAR TO 10-YEAR RESULTS WITH THE ANATOMIC MODULAR TOTAL KNEE

The outcome of 186 consecutive total knee arthroplasties performed wit h the Anatomic Modular Knee is reported, One hundred forty-two knees h ad followup of 4 to 10 years (mean, 6.9 years), Two knees required rev ision of all components, one because of infection and the other for in stability, Se, en patients underwent exchange of the modular tibial po lyethylene insert at an average of 84 months postoperatively. The mean age of these seven patients at primary arthroplasty was 54 years. No implant showed clinical or radiographic evidence of loosening and ther e were no complications related to patellofemoral articulation, The re vision rate of the femoral, tibial, and patellar components was tyro o f 142 or 1.4%. The revision rate including exchange of the polyethylen e insert was nine of 142 or 6.3%, This minimally constrained posterior cruciate retaining modular design performed well at intermediate foll owup, The absence of patellofemoral complications and aseptic loosenin g was notable, Wear related phenomena were the most common indications for reoperation and these occurred in younger, active individuals wit h relatively thin polyethylene bearings, The relative value of modular tibial inserts and the outcome of isolated polyethylene exchanges war rant additional study.