Journal of the Mechanical Behavior of Biomedical Materials ( IF 3.9 ) Pub Date : 2018-11-01 , DOI: 10.1016/j.jmbbm.2018.10.036 Dongxu Liu 1 , Jianfeng Jiang 1 , Lei Wang 2 , Jie Liu 2 , Zhongmin Jin 3 , Leiming Gao 4 , Yingqi Hua 2 , Zhengdong Cai 2 , Zikai Hua 1
Hemipelvic prostheses are used to reconstruct the damaged pelvis due to bone tumors and traumas. However, biomechanical properties of the reconstructed pelvis remain unclear, causing difficulties to implant development and prediction of surgical outcome. In this study, a novel adjustable hemipelvic prosthesis for the Type 1–3 pelvis resection was used to reconstruct the intact pelvic ring. Two types of Pedicle Screw Rod Systems were proposed to improve the stability of fixation between the prosthesis and the bone. Finite Element models of the reconstructed pelvis were built to analyze the performance of the prosthesis and PSRS. Moreover, an in vitro experimental study was performed to measure the deformation of the human reconstructed pelvis. Numerical results agree well with the experimental data. It was found that displacements and stresses bilaterally transferred more evenly in the reconstructed pelvis enhanced by bilateral Pedicle Screw Rod System. The load-transfer function of the pelvis under double-leg standing stance could be recovered. The bilateral pedicle system has better biomechanical performance than the unilateral pedicle system.
中文翻译:
新型可调半盆假体的生物力学和稳定性的体外实验和数值研究。
半骨盆假体用于重建由于骨肿瘤和创伤引起的受损骨盆。然而,重建的骨盆的生物力学特性仍然不清楚,导致植入物发展和手术结果预测困难。在这项研究中,一种用于1-3型骨盆切除术的新型可调节半盆假体被用于重建完整的骨盆环。提出了两种类型的椎弓根螺钉杆系统,以提高假体与骨骼之间固定的稳定性。建立了骨盆重建的有限元模型,以分析假体和PSRS的性能。此外,进行了一项体外实验研究,以测量人类重建骨盆的变形。数值结果与实验数据吻合良好。结果发现,在双侧椎弓根螺钉杆系统增强的重建骨盆中,两侧的位移和应力更均匀地转移。可以恢复双腿站立时骨盆的负荷传递功能。双侧椎弓根系统比单侧椎弓根系统具有更好的生物力学性能。