Comparison of clinical outcomes between total knee arthroplasty and unicompartmental knee arthroplasty for osteoarthritis of the knee: a retrospective analysis of preoperative and postoperative results.

Akira Horikawa,Yoichi Shimada,Hiroyuki Kodama,Naohisa Miyakoshi

doi:10.1186/s13018-015-0309-2

Akira Horikawa, Yoichi Shimada + Show 2 more

Open Access

https://doi.org/10.1186/s13018-015-0309-2

Copy DOI

Abstract

BackgroundExcellent results have recently been reported for both total knee arthroplasty (TKA) and unicompartmental knee arthroplasty (UKA), but there have been few reports about which has a better long-term outcome. The preoperative and postoperative results of TKA and UKA for osteoarthritis of the knee were thus compared.MethodsThe results of 48 patients who underwent TKA and 25 patients who underwent UKA were evaluated based on clinical scores and survivorship in the middle long-term period. Preoperative, latest postoperative, and changes in the femoro-tibial angle (FTA), range of motion (ROM), Japanese Orthopedic Association score (JOA score), and Japanese Knee Osteoarthritis Measure (JKOM) were compared. The patients’ mean age was 73 years. The mean follow-up period was 9 years (TKA: mean, 10.5 years; range, 7–12 years; UKA: mean, 9 years; range, 6–11 years).ResultsPreoperative FTA and ROM were significantly higher in the UKA group than in the TKA group. Total changes in all scores were similar among the two groups, as were changes in scores for all JOA and JKOM domains. The cumulative revision rate was higher for UKA than for TKA (7 versus 4 %). Kaplan-Meier survivorship at 10 years was 84 % for UKA and 92 % for TKA.ConclusionsThis clinical study found no significant differences between TKA and UKA, except in long-term survivorship.

Highlights

Excellent results have recently been reported for both total knee arthroplasty (TKA) and unicompartmental knee arthroplasty (UKA), but there have been few reports about which has a better long-term outcome
The exclusion criteria for UKA were more than 15° varus deformity, over 5° flexion contracture, less than 90° active range of motion (ROM), dysfunction of the anterior cruciate ligament (ACL), non-isolated medial compartment involving the patellofemoral joint, or rheumatoid arthritis [7,8,9,10]
The clinical outcomes were compared between the TKA and UKA groups

Summary

Introduction

Excellent results have recently been reported for both total knee arthroplasty (TKA) and unicompartmental knee arthroplasty (UKA), but there have been few reports about which has a better long-term outcome. The preoperative and postoperative results of TKA and UKA for osteoarthritis of the knee were compared. Total knee arthroplasty (TKA) and unicompartmental knee arthroplasty (UKA) have been recognized as good choices for the treatment of progressive osteoarthritis of the knee since these surgical procedures were first invented and reported [1, 2]. TKA has long been acknowledged as the best operative treatment for knee. To the best of our knowledge, few clinical studies and review articles have compared the long-term survivorship and clinical outcomes after TKA and UKA [7]

Methods

Results

Conclusion