Aljuhani Wazzan S, Qasim Salman S, Alrasheed Abdullah, Altwalah Jumanah, Alsalman Mohammed J
Department of Surgery, Ministry of the National Guard - Health Affairs, Riyadh, Saudi Arabia.
King Abdullah International Medical Research Center, Riyadh, Saudi Arabia.
Knee Surg Relat Res. 2021 Apr 8;33(1):12. doi: 10.1186/s43019-021-00095-2.
The posterior tibial slope (PTS) is crucial in knee joint stability and in maintaining the natural movement of the knee. An increase in the PTS is associated with various knee pathologic conditions, such as anterior cruciate ligament (ACL) injury and anterior tibial translation (ATT). In the present study, we aimed to establish native medial and lateral PTS values for adult Saudis and to identify any association between PTS and gender, age, and body mass index (BMI).
A total of 285 consecutive, normal, magnetic resonance imaging (MRI) studies of the knee were included in the study. The PTS was measured using the proximal anatomical axis of the tibia. The Kruskal-Wallis test was used to compare the medial and lateral PTS angles between age groups. The difference between the medial and lateral posterior tibial slopes was assessed using the Wilcoxon signed-rank test. The Mann-Whitney U test was performed to compare the medial and lateral PTS angles between men and women. Age, gender, and BMI were analyzed by multivariate linear regression to determine whether they positively predict the medial and lateral PTS angles.
The mean physiological medial PTS was 5.86 ± 3.0° and 6.61 ± 3.32°, and the lateral PTS was 4.41 ± 3.35° and 4.63 ± 2.85° in men and women, respectively. This difference showed no statistically significant gender dimorphism (p > 0.05). The medial PTS was significantly larger than the lateral PTS (p < 0.0001). There was no statistically significant difference in the medial and lateral PTS angles between age groups (p > 0.05). Higher BMI was significantly associated with a steeper medial PTS (p = 0.001).
This study provided native values for medial and lateral PTS angles in Saudis, which can assist surgeons in maintaining normal knee PTS during surgery. The PTS was not influenced by age. The medial PTS was significantly larger than the lateral PTS in men and women. The PTS showed no significant gender dimorphism. BMI was significantly associated with the medial PTS.
胫骨后倾坡度（PTS）在膝关节稳定性及维持膝关节自然运动方面至关重要。PTS增加与多种膝关节病理状况相关，如前交叉韧带（ACL）损伤和胫骨前移（ATT）。在本研究中，我们旨在确定成年沙特人的内侧和外侧PTS的正常值，并确定PTS与性别、年龄和体重指数（BMI）之间的任何关联。
本研究共纳入285例连续的、正常的膝关节磁共振成像（MRI）研究。使用胫骨近端解剖轴测量PTS。采用Kruskal-Wallis检验比较各年龄组之间的内侧和外侧PTS角度。使用Wilcoxon符号秩检验评估内侧和外侧胫骨后倾坡度之间的差异。进行Mann-Whitney U检验以比较男性和女性之间的内侧和外侧PTS角度。通过多元线性回归分析年龄、性别和BMI，以确定它们是否能正向预测内侧和外侧PTS角度。
男性的平均生理性内侧PTS为5.86±3.0°，外侧PTS为4.41±3.35°；女性的平均生理性内侧PTS为6.61±3.32°，外侧PTS为4.63±2.85°。这种差异无统计学意义上的性别二态性（p>0.05）。内侧PTS显著大于外侧PTS（p<0.0001）。各年龄组之间的内侧和外侧PTS角度无统计学显著差异（p>0.05）。较高的BMI与更陡的内侧PTS显著相关（p=0.001）。
本研究提供了沙特人内侧和外侧PTS角度的正常值，这有助于外科医生在手术过程中维持正常的膝关节PTS。PTS不受年龄影响。男性和女性的内侧PTS均显著大于外侧PTS。PTS无显著的性别二态性。BMI与内侧PTS显著相关。
