Orthopedic Surgery Department, Third Hospital of Hebei Medical University, 139 Ziqiang Road, Shijiazhuang, 050051, Hebei, People's Republic of China.
BMC Musculoskelet Disord. 2024 Aug 1;25(1):616. doi: 10.1186/s12891-024-07730-5.
Studies have shown an association between medial meniscus posterior root tears (MMPRT) and morphologic characteristics of the bone. However, the association between distal femoral bone morphology and MMPRT, particularly the medial femoral posterior condyle, is poorly understood. Our study aimed to determine the association between the morphologic characteristics of the medial posterior femoral condyle and MMPRT.
A retrospective case-control study was performed from January 2021 to January 2022. After screening based on the inclusion and exclusion criteria, two matched groups were analyzed: the MMPRT group and the isolated lateral meniscus tears group. The hip-knee-ankle angle (HKA) and Kellgren-Lawrence grade (KLG) were measured on radiographs; the medial tibial slope angle (MTSA), medial tibial plateau depth (MTPD), and radius of the medial femoral posterior condyle (RMFPC) were measured on magnetic resonance imaging (MRI) in both groups. The area under the curve (AUC) and the best cutoff value for predicting MMPRT were calculated by using receiver operating characteristic (ROC) curve analysis.
The final analysis included a total of 174 patients (87 MMPRT patients and 87 controls). Significant differences were shown in the RMFPC (17.6 ± 1.0 vs. 16.2 ± 1.0, p < 0.01) and MTSA (6.4 ± 2.0 vs. 4.0 ± 1.3, p < 0.01), which were larger than those of the control group. The MTPD (1.8 ± 0.6 vs. 2.9 ± 0.7, p < 0.01) and HKA (175.4 ± 2.2 vs. 179.0 ± 2.7, p < 0.01) of the injury group were significantly different from the control group, and both were lower than the control group. However, between the MMPRT and control groups on the KLG (2.3 ± 0.6 vs. 2.2 ± 0.6, p = 0.209), there was no statistically significant difference. Among them, the RMFPC cutoff value was calculated to be 16.8 mm by ROC curve analysis, and the sensitivity and specificity were both 81.61%.
This study demonstrated that larger RMFPC, MTSA, smaller MTPD, and HKA were all associated with MMPRT, and RMFPC ≥ 16.8 mm was considered as a significant risk factor for MMPRT.
研究表明内侧半月板后根部撕裂（MMPRT）与骨的形态特征之间存在关联。然而，股骨远端骨形态与 MMPRT 之间的关系，尤其是股骨内髁后，尚不清楚。本研究旨在确定内侧股骨后髁形态特征与 MMPRT 之间的关系。
这是一项回顾性病例对照研究，于 2021 年 1 月至 2022 年 1 月进行。在基于纳入和排除标准进行筛选后，对两组进行了分析：MMPRT 组和单纯外侧半月板撕裂组。在两组中，均在 X 线片上测量髋膝踝角（HKA）和 Kellgren-Lawrence 分级（KLG）；在磁共振成像（MRI）上测量内侧胫骨斜率角（MTSA）、内侧胫骨平台深度（MTPD）和内侧股骨后髁半径（RMFPC）。使用受试者工作特征（ROC）曲线分析计算曲线下面积（AUC）和预测 MMPRT 的最佳截断值。
最终分析共纳入 174 例患者（87 例 MMPRT 患者和 87 例对照）。RMFPC（17.6±1.0 比 16.2±1.0，p<0.01）和 MTSA（6.4±2.0 比 4.0±1.3，p<0.01）差异有统计学意义，均大于对照组。损伤组的 MTPD（1.8±0.6 比 2.9±0.7，p<0.01）和 HKA（175.4±2.2 比 179.0±2.7，p<0.01）与对照组有显著差异，且均低于对照组。然而，在 KLG 方面，MMPRT 组和对照组之间没有统计学差异（2.3±0.6 比 2.2±0.6，p=0.209）。其中，通过 ROC 曲线分析计算出 RMFPC 的截断值为 16.8mm，灵敏度和特异性均为 81.61%。
本研究表明，较大的 RMFPC、MTSA、较小的 MTPD 和 HKA 均与 MMPRT 相关，RMFPC≥16.8mm 被认为是 MMPRT 的显著危险因素。
