Department of Orthopaedic Surgery, Hospital Naval "Pedro Mallo", Buenos Aires, Argentina.
Int Orthop. 2013 Oct;37(10):1917-23. doi: 10.1007/s00264-013-1993-3. Epub 2013 Jul 9.
We investigated the incidence, natural history, and functional consequences of a newly developed flexion contracture after total knee arthroplasty (TKA).
Forty patients with full knee extension preoperatively who developed a postoperative flexion contracture were match-paired 1:2 with 80 patients who had full extension. The incidence of a newly developed flexion contracture, ROM, and Knee Society scores (KSS) at six weeks, four months, and one year were analysed.
The incidence of a new flexion contracture at six weeks was 14%, but diminished to 5% and 0.3% at four months and one year, respectively. One year after surgery, there was no difference in the KSS (p = 0.5).
This study showed that the majority of patients who developed a new flexion contracture after TKA have full knee extension one year postoperatively. Moreover, knee extension and KSS at one year are equivalent to those patients who did not developed a flexion contracture.
我们研究了全膝关节置换术后新出现的屈曲挛缩的发生率、自然史和功能后果。
40 例术前膝关节完全伸直的患者术后出现屈曲挛缩，与 80 例膝关节完全伸直的患者进行 1:2 配对。分析术后 6 周、4 个月和 1 年的新发屈曲挛缩发生率、ROM 和膝关节协会评分（KSS）。
术后 6 周新发生屈曲挛缩的发生率为 14%，但在 4 个月和 1 年后分别降至 5%和 0.3%。术后 1 年，KSS 无差异（p = 0.5）。
本研究表明，大多数全膝关节置换术后出现新的屈曲挛缩的患者在术后 1 年时膝关节完全伸直，而且膝关节伸展度和 1 年时的 KSS 与未发生屈曲挛缩的患者相当。
