Finite element analysis and static biomechanics of pelvic after modular hemipelvic prosthesis reconstruction

• Published in: Sichuan da xue xue bao. Journal of Sichuan University. Yi xue ban Vol. 43; no. 2; p. 206
• Main Authors: Feng, Pin, Lian, Shi-Hai, Duan, Hong, Min, Li, Zhou, Yong, Liu, Zhan, Tu, Chong-Qi
• Format: Journal Article
• Language: Chinese
• Published: China 01.03.2012
• Subjects: Biomechanical Phenomena; Bone Neoplasms - surgery; Computer Simulation; Finite Element Analysis; Humans; Models, Anatomic; Pelvic Bones - surgery; Prostheses and Implants; Prosthesis Implantation; Stress, Mechanical; Weight-Bearing - physiology
• ISSN: 1672-173X

To compare the stress distribution of normal pelvis with those of postoperative contralateral pelvic and modular hemipelvic prosthesis under different positions, with an aim to providing biomechanical evidence support for safe reconstruction of pelvic ring using modular hemipelvic prosthesis. Three-dimensional finite element models of normal pelvis, postoperative pelvic and modular hemipelvic prosthesis were established using thin-layer CT scanning (TLCS). The stress distributions of normal pelvis, postoperative pelvic and prosthesis were measured under three static positions: standing on two feet, standing on one foot on the defective side and sitting. Little difference was found in contralateral pelvic stress between the normal pelvic and reconstructive pelvic models given the same load with different positions. The maximum stress level appeared at the upside of sacrum mesion, sacroiliac joints, superior greater sciatic notch and iscbial tuberosity, albeit a much lower level than fatigue strength. The maxim