Fukaya Takashi, Mutsuzaki Hirotaka, Mori Koichi
Department of Physical Therapy, Faculty of Health Sciences, Tsukuba International University, Tsuchiura, Ibaraki, Japan.
Center for Medical Sciences, Ibaraki Prefectural University of Health Sciences, Ami, Ibaraki, Japan.
J Orthop. 2019 Jan 4;16(1):101-104. doi: 10.1016/j.jor.2018.12.014. eCollection 2019 Jan-Feb.
The relations between external knee moment and the knee joint movement during stance phase of the patients with knee osteoarthritis is unknown well. This study try to clarify the relations between external knee moment and the knee joint movement during stance phase of the patients with knee osteoarthritis.
Subjects comprised 15 patients who had 23 knees with severe osteoarthritis. The knee joint movements and external knee moments while walking were measured using a motion analysis system and a floor-mounted force plate. We then calculated the change in knee joint angles, first and second peak external knee adductions, and maximum flexion-extension moments during the stance phase. Pearson's product-moment correlation coefficient was used to confirm the relation between the external moments and knee movements.
The first peak external knee adduction moment was moderately positively correlated with the maximum knee varus angle at the early stance phase and was moderately negatively correlated with the amount of change in the knee valgus direction angle at mid-stance. The peak external knee extension moment at the early stance phase was strongly positively correlated with the knee flexion angle at foot-strike and the maximum knee flexion angle at the early stance phase and was negatively correlated with the external rotation angle at foot-strike.
An effective rehabilitation approach to decrease the load of knee joint must combine both to strength the muscles around the knee joint, particularly quadriceps, and to device for controlling the knee movement.
膝关节骨关节炎患者在站立期时，膝关节外力矩与膝关节运动之间的关系尚不清楚。本研究旨在阐明膝关节骨关节炎患者在站立期时膝关节外力矩与膝关节运动之间的关系。
研究对象包括15例患者，共23个膝关节，均患有严重骨关节炎。使用运动分析系统和地面安装的测力板测量行走时的膝关节运动和膝关节外力矩。然后，我们计算了站立期膝关节角度的变化、第一次和第二次膝关节外展峰值以及最大屈伸力矩。采用Pearson积矩相关系数来确定外力矩与膝关节运动之间的关系。
第一次膝关节外展峰值力矩在站立初期与最大膝关节内翻角度呈中度正相关，在站立中期与膝关节外翻方向角度的变化量呈中度负相关。站立初期的膝关节伸展峰值力矩与足跟着地时的膝关节屈曲角度以及站立初期的最大膝关节屈曲角度呈强正相关，与足跟着地时的外旋角度呈负相关。
减轻膝关节负荷的有效康复方法必须同时包括增强膝关节周围肌肉，尤其是股四头肌的力量，以及控制膝关节运动的装置。
