In vitro experimental and numerical study on biomechanics and stability of a novel adjustable hemipelvic prosthesis

Dongxu Liu; Jianfeng Jiang; Lei Wang; Jie Liu; Zhongmin Jin; Leiming Gao; Yingqi Hua; Zhengdong Cai; Zikai Hua

doi:10.1016/j.jmbbm.2018.10.036

In vitro experimental and numerical study on biomechanics and stability of a novel adjustable hemipelvic prosthesis

J Mech Behav Biomed Mater. 2019 Feb:90:626-634. doi: 10.1016/j.jmbbm.2018.10.036. Epub 2018 Nov 1.

Authors

Dongxu Liu¹, Jianfeng Jiang¹, Lei Wang², Jie Liu², Zhongmin Jin³, Leiming Gao⁴, Yingqi Hua⁵, Zhengdong Cai², Zikai Hua⁶

Affiliations

¹ School of Mechatronics Engineering and Automation, Shanghai University, Shanghai, PR China.
² Department of Orthopaedics, Shanghai Jiaotong University Affiliated First People's Hospital, Shanghai, PR China.
³ School of Mechanical Engineering, University of Leeds, Leeds, UK. Electronic address: Z.Jin@leeds.ac.uk.
⁴ Department of Aeronautics, Imperial College London, London, UK. Electronic address: leiming.gao@imperial.ac.uk.
⁵ Department of Orthopaedics, Shanghai Jiaotong University Affiliated First People's Hospital, Shanghai, PR China. Electronic address: yhua@shsmu.edu.cn.
⁶ School of Mechatronics Engineering and Automation, Shanghai University, Shanghai, PR China. Electronic address: eddie_hua@shu.edu.cn.

PMID: 30500700
DOI: 10.1016/j.jmbbm.2018.10.036

Abstract

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.

Keywords: Biomechanics; Finite element (FE) method; Pelvis; Prosthesis; Reconstruction stability.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Biomechanical Phenomena
Finite Element Analysis*
Humans
Materials Testing*
Mechanical Phenomena*
Pelvic Bones* / surgery
Prostheses and Implants*
Prosthesis Design
Stress, Mechanical