桡腕关节和腕骨间关节的负荷理论分布。
Theoretical distribution of load in the radius and ulna carpal joint.
机构信息
Departament of Mechanical and Mechatronics Engineering, Numerical Methods and Modeling Group Research (GNUM), Universidad Nacional de Colombia, Bogotá, Colombia; Biomimetics Laboratory, Instituto de Biotecnología, Universidad Nacional de Colombia, Bogotá, Colombia.
Department of Orthopedic Surgery, School of Medicine, Universidad Nacional de Colombia, Bogotá, Colombia.
出版信息
Comput Biol Med. 2015 May;60:100-6. doi: 10.1016/j.compbiomed.2015.02.016. Epub 2015 Mar 5.
PURPOSE
The purpose of this study is to validate a model for the analysis of the load distribution through the wrist joint, subjected to forces on the axes of the metacarpals from distal to proximal for two different mesh densities.
METHOD
To this end, the Rigid Body Spring Model (RBSM) method was used on a three-dimensional model of the wrist joint, simulating the conditions when making a grip handle. The cartilage and ligaments were simulated as springs acting under compression and tension, respectively, while the bones were considered as rigid bodies. At the proximal end of the ulna the movement was completely restricted, and the radius was allowed to move only in the lateral/medial direction.
RESULTS
With these models, we found the load distributions on each carpal articular surface of radius. Additionally, the results show that the percentage of the applied load transmitted through the radius was about 86% for one mesh and 88% for the coarser one; for the ulna it was 21% for one mesh and 18% for the coarser.
CONCLUSIONS
The obtained results are comparable with previous outcomes reported in prior studies. The latter allows concluding that, in theory, the methodology can be used to describe the changes in load distribution in the wrist.
目的
本研究的目的是验证一种模型，用于分析在远侧到近侧的掌骨轴上受力时，通过腕关节的负荷分布，针对两种不同的网格密度。
方法
为此，在腕关节的三维模型上使用刚体弹簧模型（RBSM）方法，模拟握持手柄的情况。软骨和韧带分别模拟为受压和受拉的弹簧，而骨骼则被视为刚体。在尺骨的近端，运动完全受限，桡骨只能在外侧/内侧方向移动。
结果
使用这些模型，我们发现了桡骨关节表面上的每个掌骨的负荷分布。此外，结果表明，对于一种网格，通过桡骨传递的施加负荷的百分比约为 86%，对于较粗的网格为 88%；对于尺骨，对于一种网格为 21%，对于较粗的网格为 18%。
结论
得到的结果与之前研究中报告的先前结果相当。后者可以得出结论，从理论上讲，该方法可用于描述腕关节中负荷分布的变化。
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