Xu Guanghua, Liu Hongyu, Zhang Lifu
Institute of Sport and Exercise Medicine, North University of China, Taiyuan, China.
Front Bioeng Biotechnol. 2022 May 4;10:872258. doi: 10.3389/fbioe.2022.872258. eCollection 2022.
It has been found that ankle joint impingement can cause articular cartilage injury, and the change of subchondral bone density and distribution under long-term stress loading can reflect the stress interaction of the articular surface and the difference in bone remodeling degree and predict the location of cartilage injury. To investigate the bone density distribution pattern of ankle joint subchondral bone under mechanical stress loading of Taekwondo, the volume proportion of bone tissue with different bone densities, and the distribution characteristics of bone remodeling position. A controlled laboratory study. Computed tomography data were collected from the feet of 10 normal subjects (control group) and 10 high-level Taekwondo athletes. First, the distribution pattern of the high-density area of the articular surface was determined by computed tomography osteoabsorptiometry and the nine-grid anatomical region localization method. Second, the percentage of bone volume (%BTV) and the distribution trend of bone tissue were measured. In the present study, it was found that there were high-density areas in the 1st, 2nd, 3rd, 4th, 6th, 7th, and 9th regions of the distal tibia of Taekwondo athletes, and the distribution track was consistent with the high-density areas of the talar dome surface (1st, 2nd, 3rd, 4th, 6th, 7th, and 9th regions). In Taekwondo athletes, the percentage of bone tissue volume in the distal tibia and talus with high and moderate bone density was significantly higher than that in the control group ( < 0.05). The impact stress, ground reaction force, intra-articular stress, lower limb movement technology, lower limb muscle, and tendon stress caused by Taekwondo lead to special pressure distribution patterns and bone tissue remodeling in the ankle.
研究发现，踝关节撞击可导致关节软骨损伤，长期应力负荷下软骨下骨密度及分布变化可反映关节面应力相互作用以及骨重塑程度差异，并可预测软骨损伤部位。为探究跆拳道运动力学应力负荷下踝关节软骨下骨的骨密度分布模式、不同骨密度骨组织的体积占比以及骨重塑位置的分布特征，进行了一项对照实验室研究。收集了10名正常受试者（对照组）和10名高水平跆拳道运动员足部的计算机断层扫描数据。首先，通过计算机断层扫描骨吸收测定法和九宫格解剖区域定位法确定关节面高密度区的分布模式。其次，测量骨体积百分比（%BTV）和骨组织的分布趋势。在本研究中，发现跆拳道运动员胫骨远端第1、2、3、4、6、7和9区存在高密度区，且分布轨迹与距骨穹窿面的高密度区（第1、2、3、4、6、7和9区）一致。在跆拳道运动员中，胫骨远端和距骨中高、中等骨密度的骨组织体积百分比显著高于对照组（<0.05）。跆拳道所产生的冲击应力、地面反作用力、关节内应力、下肢运动技术、下肢肌肉和肌腱应力导致踝关节出现特殊的压力分布模式和骨组织重塑。
