The optimal rotational axis of the tibial component in lateral unicompartmental knee arthroplasty (UKA) should be aligned parallel to the lateral tibial spine. However, the relatively lateral positions of the tibial tubercle and patellar tendon make the sagittal tibial cut in lateral UKA difficult and commonly predisposes to inadvertent external rotation of the tibial component. The purpose of this study was to quantify the potential rotational impact that occurs when aligning the anterior edge of the sagittal tibial cut with the lateral edge of the patellar tendon in lateral UKA.
Recommended CitationKerr, MD, Glenn J.; O'Toole, MD, Patrick; Wu, DO, Eddie; and Lonner, MD, Jess H., "The Patellar Tendon Can Cause External Tibial Component Malrotation in Lateral Unicondylar Knee Arthroplasty" (2015). Rothman Institute Conference Posters. Paper 15.