Phan C-B, Nguyen D-P, Lee K M, Koo S
School of Mechanical Engineering, Chung-Ang University, Seoul, South Korea.
Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seongnam, South Korea.
Bone Joint Res. 2018 Sep 15;7(8):501-507. doi: 10.1302/2046-3758.78.BJR-2018-0014.R1. eCollection 2018 Aug.
The objective of this study was to quantify the relative movement between the articular surfaces in the tibiotalar and subtalar joints during normal walking in asymptomatic individuals.
3D movement data of the ankle joint complex were acquired from 18 subjects using a biplanar fluoroscopic system and 3D-to-2D registration of bone models obtained from CT images. Surface relative velocity vectors (SRVVs) of the articular surfaces of the tibiotalar and subtalar joints were calculated. The relative movement of the articulating surfaces was quantified as the mean relative speed (RS) and synchronization index (SI) of the SRVVs.
SI and mean RS data showed that the tibiotalar joint exhibited translational movement throughout the stance, with a mean SI of 0.54 (sd 0.21). The mean RS of the tibiotalar joint during the 0% to 20% post heel-strike phase was 36.0 mm/s (sd 14.2), which was higher than for the rest of the stance period. The subtalar joint had a mean SI value of 0.43 (sd 0.21) during the stance phase and exhibited a greater degree of rotational movement than the tibiotalar joint. The mean relative speeds of the subtalar joint in early (0% to 10%) and late (80% to 90%) stance were 23.9 mm/s (sd 11.3) and 25.1 mm/s (sd 9.5), respectively, which were significantly higher than the mean RS during mid-stance (10% to 80%).
The tibiotalar and subtalar joints exhibited significant translational and rotational movement in the initial stance, whereas only the subtalar joint exhibited significant rotational movement during the late stance. The relative movement on the articular surfaces provided deeper insight into the interactions between articular surfaces, which are unobtainable using the joint coordinate system.: C-B. Phan, D-P. Nguyen, K. M. Lee, S. Koo. Relative movement on the articular surfaces of the tibiotalar and subtalar joints during walking. 2018;7:501-507. DOI: 10.1302/2046-3758.78.BJR-2018-0014.R1.
本研究的目的是量化无症状个体正常行走时距小腿关节和距下关节关节面之间的相对运动。
使用双平面荧光透视系统和从CT图像获得的骨模型的三维到二维配准，从18名受试者获取踝关节复合体的三维运动数据。计算距小腿关节和距下关节关节面的表面相对速度矢量（SRVVs）。关节面的相对运动被量化为SRVVs的平均相对速度（RS）和同步指数（SI）。
SI和平均RS数据显示，距小腿关节在整个站立期表现为平移运动，平均SI为0.54（标准差0.21）。足跟撞击后0%至20%阶段距小腿关节的平均RS为36.0毫米/秒（标准差14.2），高于站立期的其余阶段。距下关节在站立期的平均SI值为0.43（标准差0.21），并且比距小腿关节表现出更大程度的旋转运动。距下关节在站立早期（0%至10%）和晚期（80%至90%）的平均相对速度分别为23.9毫米/秒（标准差11.3）和25.1毫米/秒（标准差9.5），显著高于站立中期（10%至80%）的平均RS。
距小腿关节和距下关节在初始站立期表现出显著的平移和旋转运动，而仅距下关节在站立后期表现出显著的旋转运动。关节面上的相对运动为关节面之间的相互作用提供了更深入的见解，这是使用关节坐标系无法获得的。：C-B.潘、D-P.阮、K.M.李、S.库。行走过程中距小腿关节和距下关节关节面的相对运动。2018年；7：501-507。DOI：10.1302/2046-3758.78.BJR-2018-0014.R1。
