Comparative Fixation and Subsidence Profiles of Cementless Unicompartmental Knee Arthroplasty Implants.

Background: Aseptic loosening is the primary cause of failure for both cemented and cementless unicondylar knee replacements (UKRs). Micromotion and subsidence of tibial baseplate are two causes of failure, due to poor fixation and misalignment, respectively.

Methods: Stair ascent activity profiles from Bergmann et al and Li et al were used.