Department of Orthopedic Surgery, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, South Korea.
Arthroscopy. 2012 Apr;28(4):502-6. doi: 10.1016/j.arthro.2011.08.315. Epub 2012 Jan 20.
The purpose was to analyze the association between posterior tibial slope (PTS) and mucoid degeneration of the anterior cruciate ligament (ACL).
From October 1999 to May 2010, 84 arthroscopies were performed in 82 patients (18 men and 64 women) with mucoid degeneration of the ACL. The mean patient age was 53 years (range, 25 to 75 years). In addition to this patient group (group I), the study included a control group without mucoid degeneration of the ACL that was randomly matched for age, sex, body mass index, left or right side, and associated lesions (group II). For each group, the diagnosis was made by use of magnetic resonance imaging and arthroscopy, and a plain lateral radiograph was used to measure the PTS.
The mean PTS was 13.5° ± 2.6° (range, 8.2° to 19.5°) in group I and 9.4° ± 2.5° (range, 4.8° to 15.5°) in group II. The mean PTS in group I was significantly greater than that in group II (P < .001). For group I, the mean PTS of the involved knee was significantly greater than that of the uninvolved contralateral knee (P = .044). There were no differences according to age, sex, left or right side, body weight, and body mass index (P > .05).
Mucoid degeneration of the ACL was found to be associated with an increased PTS. The patients with mucoid degeneration of the ACL had a greater mean PTS than matched control patients (13.5° v. 9.4°, P < .001).
Level III, diagnostic study of nonconsecutive patients without consistently applied gold standard.
分析胫骨后倾角（PTS）与前交叉韧带（ACL）黏液样变性之间的关系。
1999 年 10 月至 2010 年 5 月，对 82 例 ACL 黏液样变性患者（18 名男性，64 名女性）进行了 84 次关节镜检查。患者平均年龄 53 岁（25-75 岁）。除了这组患者（I 组），还包括一个 ACL 黏液样变性的对照组，该组患者按年龄、性别、体重指数、左右侧及合并损伤情况进行随机匹配（II 组）。每组均通过磁共振成像和关节镜检查作出诊断，并采用标准侧位 X 线片测量 PTS。
I 组 PTS 平均值为 13.5°±2.6°（8.2°-19.5°），II 组 PTS 平均值为 9.4°±2.5°（4.8°-15.5°）。I 组 PTS 明显大于 II 组（P<0.001）。I 组患膝 PTS 明显大于对侧未受累膝（P=0.044）。但年龄、性别、左右侧、体重、体重指数无差异（P>0.05）。
ACL 黏液样变性与 PTS 增加有关。与匹配的对照组患者相比（13.5°对 9.4°，P<0.001），ACL 黏液样变性患者的 PTS 平均值更大。
III 级，非连续患者的诊断研究，未应用一致的金标准。
