科研之友
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摘要
Introduction: Several differences in kinematics, functional outcomes and alignment exist between medial and lateral unicompartmental knee arthroplasty (IAA). Therefore, the purpose of this study was (1) to compare functional outcomes between both procedures with the hypothesis that both have equivalent outcomes and (2) to assess the role of preoperative and postoperative alignment on functional outcomes in both procedures. Methods: Patients who underwent UKA were included when overall function - using Western Ontario and McMaster Universities Arthritis (WOMAC) score - and joint awareness - using Forgotten Joint Score (FJS) - were available preoperatively and at minimum two-year follow-up. A total of 143 medial UKA and 36 lateral UKA patients reported outcomes at mean 2.4-years follow-up (range 2.0 to 5.0 year). Results: Preoperatively and postoperatively, no differences were seen between medial and lateral UKA in overall 89.8 +/- 11.7 vs. 90.2 +/- 12.4, respectively, p = 0.855) and joint awareness (71.2 +/- 24.5 vs. 70.9 +/- 28.2, respectively, p = 0.956). With neutral postoperative alignment (-1 degrees to three degrees), less joint awareness was noted following medial UKA than lateral UKA (72.6 +/- 22.6 vs. 55.3 +/- 28.5, p = 0.024). With undercorrection (three degrees to seven degrees), however, following lateral UKA less joint awareness (853 19.5 vs. 68.2 +/- 26.8, p = 0.020) and better functional outcomes (96.0 +/- 5.4 vs. 88.5 +/- 11.6, p = 0.001) were noted than medial UKA. Conclusion: Equivalent functional outcomes were noted between medial and lateral UKA at short-term follow-up but different optimal alignment angles seem to exist for both procedures. Level of evidence: Level III therapeutic study.
- 出版日期2016-12
