Related Experiment Video
Updated: May 10, 2026
In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty
Published on: May 5, 2023
Current fit of medial and lateral unicompartmental knee arthroplasty
Wolfgang Fitz1, Robin Bliss, Elena Losina
1Department of Orthopaedic Surgery, Brigham and Women's Hospital, Boston, Brigham and Women's Arthritis Center, 850 Boylston Street, Chestnut Hill, MA 02467, USA. wfitz@partners.org
Abstract:
Whether failure in unicompartmental knee arthroplasty (UKA) is related to implant design remains unclear. We hypothesize that current available UKAs fit within 2 mm. Forty-eight CTs of cadaveric knees were compared to current available UKA brands. Overall no-fit compared to at least one component within 2 mm is high (91.7%) and worse for males (100%) compared to females (833%). Good fit was observed for the medial but not for the lateral tibia plateau. Seven males (29.2%) had larger dimensions of more than 2 mm. For the widest UKA brand, 12 (57%) males and 2 females (8. 3%) had lateral femoral condyles 3 mm larger. Current UKA's in our sample population fit less on the lateral tibia and on femoral condyles.