Flören Markus, Davis Jack, Peterson Margaret G E, Laskin Richard S
Hospital for Special Surgery, New York, New York 10021, USA.
J Arthroplasty. 2007 Sep;22(6 Suppl 2):51-7. doi: 10.1016/j.arth.2007.05.008. Epub 2007 Jul 27.
Our aim in this study was to evaluate the prevalence of patella baja after total knee arthroplasty (TKA) using 2 different surgical techniques. Postoperative changes in patella height were measured on serial radiographs of 74 TKAs implanted using a mini-midvastus capsular approach without patella eversion (group 1) and 57 TKAs implanted using a standard medial parapatellar capsular approach with patella eversion (group 2). Preoperative and postoperative Knee Society scores, operative data, and complications were compared. With a cutoff level of 5% shortening, the prevalence was 12% in group 1 and 37% in group 2 (P = .001). The presence of patella baja was related to reduced flexion and increased pain as early as 1 year after TKA.
本研究的目的是使用两种不同的手术技术评估全膝关节置换术（TKA）后低位髌骨的发生率。对74例采用不进行髌骨外翻的迷你股中肌关节囊入路植入的TKA（第1组）和57例采用进行髌骨外翻的标准内侧髌旁关节囊入路植入的TKA（第2组）的系列X线片测量术后髌骨高度的变化。比较术前和术后的膝关节协会评分、手术数据及并发症。以缩短5%为临界值，第1组的发生率为12%，第2组为37%（P = .001）。早在TKA术后1年，低位髌骨的存在就与屈曲减少和疼痛增加有关。
