Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun, China.
Weihai Institute for Bionics - Jilin University, Weihai, China.
Int J Numer Method Biomed Eng. 2022 Sep;38(9):e3617. doi: 10.1002/cnm.3617. Epub 2022 May 23.
Most researchers have performed finite element (FE) analysis of the human forearm fracture by exploring the strength and load transmission of the bones. However, few studies concentrated a complete simulation of the whole forearm complex including ligaments. This paper aims to investigate the load transmission through the bones, contact stress at the joints and strain in the ligaments by using an elaborate FE model, further validating the fracture condition for human forearm. The interosseous ligament was separated into three regions based on the distance to the proximal and distal ends. The FE simulation results were slightly more or less than a previous experimental data in the literature, but generally provided a close approximation of the bone and ligament behaviors. Compared with the experiment results under different loading conditions, maximum contact stress at the proximal radio ulnar joint (PRUJ) and distal radio ulnar joint (DRUJ) of the simulations was higher with an average of 13.4%, and peak strain in the interosseous ligament (IOL) was lower with an average of 11.0%. Under 10 kg load, the maximum stress in the radius (2.25 MPa) was less than double the value in the ulna (1.43 MPa). Finally, the FE model has been validated with the onset and location of the Colles' fracture in the literature. This study will provide a great benefit in terms of surgical and medical applications related to forearm fracture that require an extensive knowledge of the behavior of the bones and ligaments under various loading conditions.
大多数研究人员通过探索骨骼的强度和载荷传递，对人体前臂骨折进行了有限元（FE）分析。然而，很少有研究集中于完整模拟包括韧带在内的整个前臂复合体。本文旨在通过使用精细的 FE 模型来研究骨骼中的载荷传递、关节处的接触应力和韧带中的应变，进一步验证人体前臂的骨折情况。根据距近侧和远侧末端的距离，将骨间韧带分为三个区域。FE 模拟结果与文献中的先前实验数据略有出入，但总体上提供了对骨骼和韧带行为的近似。与不同加载条件下的实验结果相比，模拟中近侧桡尺关节（PRUJ）和远侧桡尺关节（DRUJ）的最大接触应力平均高 13.4%，骨间韧带（IOL）的峰值应变平均低 11.0%。在 10kg 载荷下，桡骨（2.25MPa）的最大应力不到尺骨（1.43MPa）的两倍。最后，FE 模型已经过文献中 Colles 骨折的起始和位置验证。这项研究将在与前臂骨折相关的外科和医疗应用方面提供很大的益处，这些应用需要广泛了解骨骼和韧带在各种加载条件下的行为。
