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BMC Musculoskeletal Disorders
Published in: BMC Musculoskeletal Disorders 1/2023

Open Access 01-12-2023 | Fracture Healing | Research

Biomechanical study of the stiffness of the femoral locking compression plate of an external fixator for lower tibial fractures

Authors: Huan Su, Siyang Zhong, Tianyong Ma, Weidong Wu, Yihong Lu, Dewei Wang

Published in: BMC Musculoskeletal Disorders | Issue 1/2023

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Abstract

Background

A locking compression plate (LCP) of the distal femur is used as an external fixator for lower tibial fractures. However, in clinical practice, the technique lacks a standardized approach and a strong biomechanical basis for its stability.

Methods

In this paper, internal tibial LCP fixator (Group IT-44), external tibial LCP fixator (Group ET-44), external distal femoral LCP fixator (Group EF-44, group EF-33, group EF-22), and conventional external fixator (Group CEF-22) frames were used to fix unstable fracture models of the lower tibial segment, and anatomical studies were performed to standardize the operation as well as to assess the biomechanical stability and adjustability of the distal femoral LCP external fixator by biomechanical experiments.

Results

It was found that the torsional and flexural stiffnesses of group EF-44 and group EF-33 were higher than those of group IT-44 and group ET-44 (p < 0.05); the flexural stiffness of group EF-22 was similar to that of group IT-44 (p > 0.05); and the compressive stiffness of all three EF groups was higher than that of group ET-44 (p < 0.05). In addition, the flexural and compressive stiffnesses of the three EF groups decreased with the decrease in the number of screws (p < 0.05), while the torsional stiffness of the three groups did not differ significantly between the two adjacent groups (p > 0.05). Group CEF-22 showed the highest stiffnesses, while group ET-44 had the lowest stiffnesses (P < 0.05).

Conclusions

The study shows that the distal femoral LCP has good biomechanical stability and adjustability and is superior to the tibial LCP as an external fixator for distal tibial fractures, as long as the technique is used in a standardized manner according to the anatomical studies in this article.
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Metadata
Title
Biomechanical study of the stiffness of the femoral locking compression plate of an external fixator for lower tibial fractures
Authors
Huan Su
Siyang Zhong
Tianyong Ma
Weidong Wu
Yihong Lu
Dewei Wang
Publication date
01-12-2023
Publisher
BioMed Central
Published in
BMC Musculoskeletal Disorders / Issue 1/2023
Electronic ISSN: 1471-2474
DOI
https://doi.org/10.1186/s12891-023-06150-1

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