All-Polyethylene Tibial Components for Unicompartmental Knee Arthroplasty

All-polyethylene and metal-backed tibial components are available for unicompartmental knee arthroplasty. Although the early design of all-polyethylene component was largely replaced by metal-backed components, improvements in polyethylene wear characteristics, component design, and surgical technique have renewed interest in all-polyethylene (InLay) components. In comparison with metal-backed (OnLay) designs, InLays require less bone resection and are easier to revise total knee replacements. Early aseptic loosening, tibial component subsidence, and anterior knee pain were found to be the primary contributors to failure of InLay designs.

Source: Operative Techniques in Orthopaedics - March 24, 2015 Category: Orthopaedics Authors: Johannes F. Plate, Marco A. Augart, Daniel N. Bracey, Alex Jinnah, Riyaz H. Jinnah, Gary G. Poehling Source Type: research