Department of Radiology, University of Health Sciences, Gazi Yasargil Training and Research Hospital, Elazig Road, 10th km Uçkuyular Location, Kayapınar, Diyarbakir, 21070, Turkey.
Dursun Odabaşı Medicine Center, Department of Orthopedics and Traumatology, University of Yüzüncü Yıl, Van, Turkey.
BMC Musculoskelet Disord. 2024 Jan 30;25(1):102. doi: 10.1186/s12891-024-07209-3.
This study aimed to reveal the posterior tibial slope (PTS) angle with 3 different methods in a large case group in the Turkish population. In addition, the reproducibility of the measurement methods used was questioned while determining the age groups, gender and side relationship of this angle.
In our retrospective study, radiographs of both knees were evaluated in all 610 patients (344 women, 56.4%) aged 25-65 years. PTS angles were measured by a radiologist and an orthopedist using anterior tibial cortex (ATC), posterior tibial cortex (PTC) and proximal tibial anatomical axis (PTAA) methods. The relationship of these angles with age group and gender, and the intra-class and inter-class correlations of all three methods were evaluated.
The mean and standard deviation (SD) of PTS angle was 11.03 ± 2.33° with ATC method, 6.25 ± 2.22° with PTC and 8.68 ± 2.16° with PTAA, and the difference was significant (p < .001). In the evaluation according to age groups, the highest mean PTS angles were detected in cases aged 25-35 (9.63 ± 1.97° [mean ± SD] by PTAA method), and there was a significant difference in comparison with other age groups (p < .05). In comparison with age groups, higher mean PTS angles were found in women and on the right side, but the difference was not statistically significant (p > .05). The intraclass and interclass correlation coefficient (ICC) of all three methods was excellent (ICC > 0.91).
This study emphasizes that the mean PTS angle in Turkish population is higher than the angle values recommended by prosthesis manufacturers, and factors such as patient age and gender should be calculated in order to ensure more effective prostheses to be applied to patients.
本研究旨在揭示土耳其人群中 3 种不同方法下的胫骨后倾角（PTS）角度。此外，在确定该角度的年龄组、性别和侧别关系时，还质疑了所使用测量方法的可重复性。
在我们的回顾性研究中，评估了 610 例年龄在 25-65 岁的患者（344 例女性，占 56.4%）的双侧膝关节 X 线片。由放射科医生和骨科医生使用胫骨前皮质（ATC）、胫骨后皮质（PTC）和胫骨近端解剖轴（PTAA）方法测量 PTS 角度。评估了这些角度与年龄组和性别之间的关系，以及所有 3 种方法的组内和组间相关性。
ATC 法测量的 PTS 角度平均为 11.03±2.33°，PTC 法为 6.25±2.22°，PTAA 法为 8.68±2.16°，差异有统计学意义（p<0.001）。在按年龄组评估时，PTAA 法测量的 25-35 岁年龄组的 PTS 角度平均值最高（9.63±1.97°），与其他年龄组相比差异有统计学意义（p<0.05）。与年龄组相比，女性和右侧的 PTS 角度平均值更高，但差异无统计学意义（p>0.05）。所有 3 种方法的组内和组间相关系数（ICC）均为优秀（ICC>0.91）。
本研究强调，土耳其人群的平均 PTS 角度高于假体制造商推荐的角度值，为了确保向患者应用更有效的假体，应计算患者的年龄和性别等因素。
