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Journal of Orthopaedic Surgery and Research
Published in: Journal of Orthopaedic Surgery and Research 1/2019

Open Access 01-12-2019 | Research article

The impact of plate length, fibula integrity and plate placement on tibial shaft fixation stability: a finite element study

Authors: Yasen Cao, Yong Zhang, Lixin Huang, Xiaowei Huang

Published in: Journal of Orthopaedic Surgery and Research | Issue 1/2019

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Abstract

Background

Tibial shaft fractures account for approximately 15% of long bone fractures. Locked plates with minimally invasive plate osteosynthesis techniques are used widely by surgeons. The purpose of this study is to investigate the impact of factors meaning the plate length, fibula integrity, and placement of the plate on the stability of tibial shaft fracture fixation.

Methods

A finite element model of the tibial shaft fracture was built. An axial force of 2500 N was applied to simulate the axial compressive load on an adult knee during single-limb stance. The equivalent von Mises stress and displacement of the fractured ends were used as the output measures.

Results

In models with plates on the lateral side of the tibia, displacement in models fixed with a 12-hole plate showed the smallest value. In models with plates on the medial side of the tibia, displacement in models fixed with 14-hole plate showed the smallest value. The peak stress of plates implanted on the medial side of the tibia was higher than that of plates on the lateral side. The peak stress and the displacement of models involved with the fibula were lower than that of models without fibula, regardless of the length or location of plates.

Conclusions

For models with plates on the medial side of the tibia, the 14-hole plate is the best choice in terms of stability. While for models with plates on the lateral side of the tibia, the 12-hole plate demonstrated the optimal biomechanical stability. The integrity of the fibula improves the anti-vertical compression stability of the construct. The peak stress of plates implanted on the medial side of the tibia was higher than that of plates on the lateral side, which indicated that the construct with medially implanted plate has a higher risk of implant failure.
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Metadata
Title
The impact of plate length, fibula integrity and plate placement on tibial shaft fixation stability: a finite element study
Authors
Yasen Cao
Yong Zhang
Lixin Huang
Xiaowei Huang
Publication date
01-12-2019
Publisher
BioMed Central
Published in
Journal of Orthopaedic Surgery and Research / Issue 1/2019
Electronic ISSN: 1749-799X
DOI
https://doi.org/10.1186/s13018-019-1088-y

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