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International Orthopaedics
Published in: International Orthopaedics 4/2013

01-04-2013 | Original Paper

Finite element analysis of the pelvis after modular hemipelvic endoprosthesis reconstruction

Authors: Yong Zhou, Li Min, Yang Liu, Rui Shi, Wenli Zhang, Hui Zhang, Hong Duan, Chongqi Tu

Published in: International Orthopaedics | Issue 4/2013

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Abstract

Purpose

The aim of this study was to investigate the biomechanics of the pelvis reconstructed with a modular hemipelvic prosthesis using finite element (FE) analysis.

Methods

A three-dimensional FE model of the postoperative pelvis was developed and input into the Abaqus FEA software version 6.7.1. Mesh refinement tests were then performed and a force of 500 N was applied at the lamina terminalis of the fifth lumbar vertebra along the longitudinal axis of the normal pelvis and the postoperative pelvis for three positions: sitting, standing on two feet, and standing on the foot of the affected side. Stress distribution analysis was performed between the normal pelvis and postoperative pelvis at these three static positions.

Results

In the normal pelvis, stress distribution was concentrated on the superior area of the acetabulum, arcuate line, sacroiliac joint, sacral midline and, in particular, the superior area of the greater sciatic notch. In the affected postoperative hemipelvis, stress distribution was concentrated on the proximal area of the pubic plate, the top of the acetabular cup, the connection between the CS-fixator and acetabular cup and the fixation between the prosthesis and sacroiliac joint.

Conclusions

Stress distribution of the postoperative pelvis was similar to the normal pelvis at three different static positions. Reconstruction with a modular hemipelvic prosthesis yielded good biomechanical characteristics.
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Metadata
Title
Finite element analysis of the pelvis after modular hemipelvic endoprosthesis reconstruction
Authors
Yong Zhou
Li Min
Yang Liu
Rui Shi
Wenli Zhang
Hui Zhang
Hong Duan
Chongqi Tu
Publication date
01-04-2013
Publisher
Springer-Verlag
Published in
International Orthopaedics / Issue 4/2013
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-012-1756-6

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