Anderson Michael J, Kruse Robert L, Leslie Chris, Levy Louis J, Pritchett James W, Hodge Jonette
Aurora Advanced Health Care, Mequon, WI, USA.
J Surg Orthop Adv. 2010 Winter;19(4):191-5.
A multicenter study was conducted to determine the durability and performance of a medially pivoting knee prosthesis in total knee arthroplasty (TKA). Between February 1999 and June 2001, 276 patients underwent 298 primary TKAs at five centers. There were 189 patients (204 knees) available for clinical evaluation after surgery, with an average follow-up of 5.4 years (range, 5.0-7.6 years). The mean age at follow-up was 69 years (range, 39-87 years). The posterior cruciate ligament was resected in 65% of the procedures. Knee Society scores (KSS) and radiographs were assessed for patients who returned for follow-up evaluation. Patients unwilling or unable to return were asked their status via telephone. There were a total of five revisions, and 5-year survivorship using Kaplan-Meier analysis was 97.2%. All radiographs exhibited well-fixed implants with no signs of gross migration or pending failure. Preoperative mean KSS and flexion were 33 and 107°, respectively, improving at latest follow-up to 90 and 121°, respectively. The medial-pivot prosthesis resulted in excellent survivorship with good functional results at medium-term follow-up.
一项多中心研究旨在确定全膝关节置换术（TKA）中内侧旋转膝关节假体的耐用性和性能。1999年2月至2001年6月期间，276例患者在五个中心接受了298例初次TKA手术。术后有189例患者（204个膝关节）可供临床评估，平均随访5.4年（范围5.0 - 7.6年）。随访时的平均年龄为69岁（范围39 - 87岁）。65%的手术切除了后交叉韧带。对返回进行随访评估的患者进行了膝关节协会评分（KSS）和X线片评估。对于不愿意或无法返回的患者，通过电话询问其状况。共有5例翻修手术，采用Kaplan-Meier分析的5年生存率为97.2%。所有X线片显示植入物固定良好，无明显移位或即将失败的迹象。术前平均KSS和屈曲度分别为33和107°，在最近一次随访时分别改善至90和121°。中期随访时，内侧旋转假体具有出色的生存率和良好的功能结果。
