When disaster strikes: Conversion of unicompartmental knee arthroplasty to total knee arthroplasty.

Objectives: To investigate the causes of failure in unicompartmental knee arthroplasty (UKA), types of implants used in the revision, evaluate the need to use tibial stems, metal block augmentations, and bone grafts during conversion to total knee arthroplasty (TKA).

Methods: In a 10-year retrospective analysis, focussing on cases of UKA failure, our study aimed to categorise early and late failures, determine the primary failure modes and assess the utilisation of bone augmentations and grafts during conversion to TKA. We evaluated patient data, diagnoses, procedure intervals, and follow-up periods to provide a comprehensive understanding of the conversion process.