School of Mechantronic Engineering and Automation, Shanghai University, Shanghai, China.
Comput Methods Biomech Biomed Engin. 2023 May;26(6):734-743. doi: 10.1080/10255842.2022.2085999. Epub 2022 Jun 10.
For the pelvic fracture reduction, generally the fragment of the unaffected side is fixed and the affected side is moved to its correct anatomical position and orientation. During the pelvic fracture reduction, circumpelvic muscles deformation is closely related to the surgical accuracy. In this article, the biomechanical properties of musculoskeletal tissue during pelvic fracture reduction are studied. Five-parameter hyperelastic model named Mooney-Rivlin is adopted to analyze muscle's stress-strain relationship. The finite element model of the injured pelvic musculoskeletal tissue is established, and the deformation of circumpelvic main muscles is simulated. Then, the dynamic simulation of pelvic fracture reduction is performed according to the planned spatial reduction path. The results show that when the muscles are stretched the same stretch length, the strain of the gluteus medius is the largest. It is most prone to deformation under and the muscle injury is most easily to occur. During the pelvic fracture reduction, the strain of gluteus maximus is the largest, and it is most prone to deformation and injury. The traction length is the largest, and the traction force mainly comes from the gluteus maximus. This study provides reference for the robot assisted pelvic fracture reduction.
对于骨盆骨折复位，通常固定未受影响侧的骨折碎片，然后将受影响侧移动到正确的解剖位置和方向。在骨盆骨折复位过程中，环绕骨盆的肌肉变形与手术精度密切相关。本文研究了骨盆骨折复位过程中肌肉骨骼组织的生物力学特性。采用五参数超弹性模型（Mooney-Rivlin 模型）来分析肌肉的应力-应变关系。建立损伤骨盆肌肉骨骼组织的有限元模型，模拟环绕骨盆主要肌肉的变形。然后，根据规划的空间复位路径进行骨盆骨折复位的动态模拟。结果表明，当肌肉拉伸相同的拉伸长度时，臀中肌的应变最大。它在下方最容易变形，肌肉损伤也最容易发生。在骨盆骨折复位过程中，臀大肌的应变最大，最容易变形和损伤。牵引长度最大，牵引力主要来自臀大肌。这项研究为机器人辅助骨盆骨折复位提供了参考。
