Comparison of joint awareness after total knee arthroplasty, medial unicompartmental knee arthroplasty, and high tibial osteotomy: a retrospective study

AbstractIntroduction:This study aimed to compare the Forgotten Joint Score-12(FJS) outcomes after high tibial osteotomy (HTO), unicompartmental knee arthroplasty (UKA), and total knee arthroplasty (TKA) with short-term follow-up (at least 2 years). We hypothesized that there would be differences in subjective outcomes between the three procedures as measured by FJS.Methods:Patients who underwent HTO, UKA, and TKA from January 2016 to December 2020 and were followed up for a minimum of 2 years were included in the study. Patient were asked to complete the FJS and Knee Injury and Osteoarthritis Outcome Scores (KOOS) questionnaires. The preoperative and postoperative clinical outcomes were compared and evaluated the patient-related factor. The FJS scores were predicted using multiple linear regression analysis. In addition, we used Patient’s Joint Perception (PJP) questions as anchors to determine whether achieve the forgotten joint and FJS thresholds were calculated using the receiver operating characteristic curve.Results:391 patients were included in the final study, and there were 111 patients in HTO groups,128patients in UKA groups, and 150 patients in TKA groups. The mean follow-up was 47.0 months. There was a significant difference in the total FJS between the HTO, UKA, and TKA groups (p <0.001).In multiple linear regression, younger age, and higher Function Score (FS) were significant predictors of better FJS.we found the thresholds of the FJS of HTO, UKA, and TKA were 63.54, 69.79, and 61.45, respectively.Conclusion:Medial UKA was associated with superior patient awareness compared to HTO and TKA as measured by FJS.