Meneghini Robert Michael, Pierson Jeffery L, Bagsby Deren, Ziemba-Davis Mary, Berend Michael E, Ritter Merrill A
St Vincent Center for Joint Replacement, Indianapolis, Indiana 46260, USA.
J Arthroplasty. 2007 Sep;22(6 Suppl 2):43-6. doi: 10.1016/j.arth.2007.03.011. Epub 2007 Jul 26.
Clinical evidence is lacking to support the functional benefit of high flexion after total knee arthroplasty (TKA). A retrospective review of 511 TKAs in 370 patients was performed. The mean follow-up was 3.7 years (range, 2-8 years). Regression analysis determined the effect of obtaining high flexion (>125 degrees ) on Knee Society, stair, function, and pain scores. Of 511 TKAs, 340 (66.5%) obtained range of motion greater than 115 degrees , and 63 (12.3%) TKAs obtained high flexion greater than 125 degrees . There was no difference between the patients who obtained flexion greater than 115 degrees and those who obtained high flexion greater than 125 degrees in Knee Society scores (P = .34) and function scores (P = .57). Patients with greater than 125 degrees of flexion are 1.56 times more likely to demonstrate optimal stair function (P = .02). Obtaining flexion greater than 125 degrees after TKA does not offer a benefit in overall knee function. However, obtaining a high degree of flexion appears to optimize stair climbing.
缺乏临床证据支持全膝关节置换术（TKA）后高屈曲度的功能益处。对370例患者的511例TKA进行了回顾性研究。平均随访时间为3.7年（范围2 - 8年）。回归分析确定了获得高屈曲度（>125度）对膝关节协会评分、上下楼梯能力、功能和疼痛评分的影响。在511例TKA中，340例（66.5%）的活动范围大于115度，63例（12.3%）的TKA获得了大于125度的高屈曲度。获得大于115度屈曲度的患者与获得大于125度高屈曲度的患者在膝关节协会评分（P = 0.34）和功能评分（P = 0.57）方面没有差异。屈曲度大于125度的患者表现出最佳上下楼梯功能的可能性高出1.56倍（P = 0.02）。TKA后获得大于125度的屈曲度对整体膝关节功能没有益处。然而，获得高度屈曲似乎能优化上下楼梯能力。
