Influence of posterior tibial slope on sagittal knee alignment with comparing contralateral knees of anterior cruciate ligament injured patients to healthy knees

被引:3
作者
Hiranaka, Yoshiaki [1 ]
Muratsu, Hirotsugu [1 ]
Tsubosaka, Masanori [2 ]
Matsumoto, Tomoyuki [2 ]
Maruo, Akihiro [1 ]
Miya, Hidetoshi [1 ]
Kuroda, Ryosuke [2 ]
Matsushita, Takehiko [2 ]
机构
[1] Hyogo Prefectural Harima Himeji Gen Med Ctr, Dept Orthopaed Surg, 3-264 Kamiya Cho, Himeji, Hyogo 6708560, Japan
[2] Kobe Univ, Dept Orthopaed Surg, Grad Sch Med, Chuou Ku, 7-5-2 Kusunoki Cho, Kobe, Hyogo 6500017, Japan
关键词
BIOMECHANICS; TRANSLATION; PLATEAU;
D O I
10.1038/s41598-022-18442-y
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Posterior tibial slope (PTS) has been known to contribute to anterior-posterior knee stability and play an essential biomechanical role in knee kinematics. This study aimed to investigate the effect of PTS on single-leg standing sagittal knee alignment of the intact knee. This study included 100 patients with unilateral ACL injury knee (ACL injury group, 53 patients) or with the normal knee (control group, 47 patients). The single-leg standing sagittal alignment of the unaffected knees of the ACL injury group and normal knees of the control group were assessed radiographically with the following parameters: knee extension angle (EXT), PTS, PTS to the horizontal line (PTS-H), femoral shaft anterior tilt to the vertical axis (FAT), and tibial shaft anterior tilt to the vertical axis (TAT). PTS was negatively correlated with EXT and positively correlated with TAT. EXT was significantly larger in the ACL injury group, whereas TAT was smaller in the ACL injury group. Patients with larger PTS tend to stand with a higher knee flexion angle by tilting the tibia anteriorly, possibly reducing tibial shear force. Patients with ACL injury tend to stand with larger EXT, i.e., there is less preventive alignment to minimize the tibial shear force.
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页数:8
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