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Finite element analysis of the pelvis after modular hemipelvic endoprosthesis reconstruction

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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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Conflict of interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, 610041, China

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

Authors
  1. Yong Zhou
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  2. Li Min
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  3. Yang Liu
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  4. Rui Shi
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  5. Wenli Zhang
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  6. Hui Zhang
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  7. Hong Duan
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  8. Chongqi Tu
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Corresponding author

Correspondence to Chongqi Tu.

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Zhou, Y., Min, L., Liu, Y. et al. Finite element analysis of the pelvis after modular hemipelvic endoprosthesis reconstruction. International Orthopaedics (SICOT) 37, 653–658 (2013). https://doi.org/10.1007/s00264-012-1756-6

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  • DOI: https://doi.org/10.1007/s00264-012-1756-6

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