Does patient-specific instrument or robot improve imaging and functional outcomes in unicompartmental knee arthroplasty? A bayesian analysis.

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Abstract

[Indexed for MEDLINE] Conflict of interest statement: Declarations. PROSPERO registered ID: CRD42023468418. Conflict of interest: No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article. 20. J Orthop Surg (Hong Kong). 2023 Jan-Apr;31(1):10225536221138986. doi: 10.1177/10225536221138986. Robotic-arm assisted lateral unicompartmental knee arthroplasty: 5-Year outcomes & survivorship. Gaudiani MA(1)(2), Samuel LT(1), Diana JN(3), DeBattista JL(3), Coon TM(3), Moore RE(3), Kamath AF(1). Author information: (1)Department of Orthopaedic Surgery, 2569Cleveland Clinic Foundation, Cleveland, OH, USA. (2)Department of Orthopaedic Surgery, Henry Ford Health, Detroit, MI, USA. (3)Coon Joint Replacement Institute, St. Helena, CA, USA. INTRODUCTION: Robotic-arm assisted unicompartmental knee arthroplasty (RA-UKA) has demonstrated accurate component positioning and excellent outcomes for medial components. However, there is a paucity of literature on lateral compartment RA-UKA. The purpose of our study was to assess the midterm clinical outcomes and survivorship of lateral RA-UKA. METHODS: This study was a retrospective review of a single-center prospectively maintained cohort of 33 patients (36 knees) indicated for lateral UKA. Perioperative, and postoperative two- and five-year Knee injury Osteoarthritis Outcome Score (KOOS), Western Ontario and McMaster Universities Osteoarthritis Score (WOMAC), and Forgotten Joint Score (FJS) patient reported outcome measures were collected. Five-year follow-up was recorded in 29 patients (32 knees). RESULTS: Mean follow up was 5.1 ± 0.1 years. Mean age and BMI was 70.9 ± 7.2 years and 29.0 ± 4.2 kg/m2, respectively. At discharge, mean distance walked was 273.4 ± 70.4 feet, and mean pain score was 2.0 ± 2.5. At 2-year follow up, mean KOOS, WOMAC, and FJS were 75.1 ± 13.5, 15.0 ± 7.2, and 81.0 ± 23.3, respectively. At 5-year follow up, mean KOOS, WOMAC, and FJS were 75.3 ± 14.6, 14.9 ± 5.0, and 75.8 ± 27.4, respectively. Mean change in KOOS and WOMAC were 35.6 ± 27.1 and 11.7 ± 13.4 (p< .001 and p< .001). 94% of patients were very satisfied/satisfied, 3% neutral, and 3% dissatisfied. 91% met activity expectations, and 59% were more active than before. Survivorship was 100% at 5 years. DISCUSSION: In this study, lateral RA-UKA demonstrated significantly improved clinical outcomes, high patient satisfaction, met expectations, and excellent functional recovery at midterm follow up. Comparative studies are needed to determine differences between robotic-assisted and conventional lateral UKA, as well as TKA. DOI: 10.1177/10225536221138986