Department of Orthopaedic Surgery, Tokyo Medical and Dental University, Tokyo, Japan.
J Arthroplasty. 2012 Mar;27(3):368-74. doi: 10.1016/j.arth.2011.05.008. Epub 2011 Jun 15.
The superiority between the posterior cruciate-retaining and the posterior cruciate-substituting designs still remains controversial. We performed a prospective, randomized control study for evaluation of the superiority of these designs. This study investigated 58 knees in 29 patients with simultaneous bilateral total knee arthroplasty, in which the high-flex CR design was randomly implanted in one knee and the high-flex PS design was implanted in the other knee. The follow-up duration averaged 5.0 years, with a minimum duration of 3 years. Postoperatively, Knee Score and pain points in Knee Score resulted in no significant differences between the 2 designs. However, postoperative arc of range of motion, patient satisfaction, and posterior knee pain at passive flexion in the PS design were significantly superior to that of the CR design.
后交叉韧带保留型和后交叉韧带替代型设计的优越性仍存在争议。我们进行了一项前瞻性、随机对照研究，以评估这两种设计的优越性。这项研究调查了 29 名患者的 58 膝同时行双侧全膝关节置换术，其中，高屈曲 CR 设计随机植入一侧膝关节，高屈曲 PS 设计植入另一侧膝关节。随访时间平均为 5.0 年，最短随访时间为 3 年。术后，两种设计的膝关节评分和膝关节评分中的疼痛点无显著差异。然而，术后运动范围的弧、患者满意度以及 PS 设计中被动屈曲时的后膝疼痛均明显优于 CR 设计。
