Tsai Tsung-Yuan, Dimitriou Dimitris, Li Jing-Sheng, Woo Nam Kwang, Li Guoan, Kwon Young-Min
Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, GRJ-1215, Boston, MA 02114, USA.
Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, GRJ-1215, Boston, MA 02114, USA.
J Biomech. 2015 Feb 26;48(4):555-559. doi: 10.1016/j.jbiomech.2015.01.021. Epub 2015 Jan 22.
Asymmetric limb loading has been reported in unilateral total hip arthroplasty (THA) patients during gait. However, restoration of 3D motion symmetry of the hip following unilateral THA remains unclear. The purpose of this study was to investigate the in vivo 3D kinematics of the hip in unilateral THA patients during gait. Eight unilateral THA patients were evaluated for both hips during treadmill gait using a dual fluoroscopic imaging system. Reduced hip range of motion in sagittal plane, decreased peak hip extension and asymmetric pelvic rotation of the THA were observed. Furthermore, significant pelvic anterior/posterior tilt asymmetry, higher internal rotation (increased by 8.6°±4.6°) during stance phase and higher adduction (increased by 4.5°±3.2°) during swing phase of the THA were found in this cohort of patients. The results demonstrated that there was 3D motion asymmetry of the hip and pelvis in unilateral THA patients during gait. The data could provide insights into optimizing kinematics and to restoring normal hip function after THA.
据报道，单侧全髋关节置换术（THA）患者在步态过程中存在肢体负荷不对称的情况。然而，单侧THA后髋关节三维运动对称性的恢复情况仍不明确。本研究的目的是调查单侧THA患者在步态过程中髋关节的体内三维运动学。使用双荧光透视成像系统，对8名单侧THA患者在跑步机上行走时的双髋进行了评估。观察到THA侧髋关节矢状面活动范围减小、髋关节伸展峰值降低以及骨盆旋转不对称。此外，在该组患者中还发现，THA侧在站立期存在明显的骨盆前后倾斜不对称、内旋增加（增加8.6°±4.6°），在摆动期内收增加（增加4.5°±3.2°）。结果表明，单侧THA患者在步态过程中髋关节和骨盆存在三维运动不对称。这些数据可为优化运动学以及THA后恢复正常髋关节功能提供见解。
