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BMC Musculoskeletal Disorders
Published in: BMC Musculoskeletal Disorders 1/2022

Open Access 01-12-2022 | Dynamic Hip Screw | Research

Biomechanical analysis of two medial buttress plate fixation methods to treat Pauwels type III femoral neck fractures

Authors: Jichao Liu, Zhengwei Li, Jie Ding, Bingzhe Huang, Chengdong Piao

Published in: BMC Musculoskeletal Disorders | Issue 1/2022

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Abstract

Background

Femoral neck fractures in young people are usually Pauwels Type III fractures. The common treatment method are multiple parallel cannulated screws or dynamic hip screw sliding compression fixation. Due to the huge shear stress, the rate of complications such as femoral head necrosis and nonunion is still high after treatment. The aim of our study was to compare the stabilities of two fixation methods in fixating pauwels type III femoral neck fractures.

Methods

All biomimetic fracture samples are fixed with three cannulated screws combined with a medial buttress plate. There were two fixation groups for the buttress plate and proximal fracture fragment: Group A, long screw (40 mm); Group B, short screw (6 mm). Samples were subjected to electrical strain measurement under a load of 500 N, axial stiffness was measured, and then the samples were axially loaded until failure. More than 5 mm of displacement or synthetic bone fracture was considered as construct failure.

Results

There were no significant differences in failure load (P = 0.669), stiffness (P = 0.842), or strain distribution (P > 0.05) between the two groups.

Conclusions

Unicortical short screws can provide the same stability as long screws for Pauwels Type III Femoral Neck Fractures.
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Metadata
Title
Biomechanical analysis of two medial buttress plate fixation methods to treat Pauwels type III femoral neck fractures
Authors
Jichao Liu
Zhengwei Li
Jie Ding
Bingzhe Huang
Chengdong Piao
Publication date
01-12-2022
Publisher
BioMed Central
Published in
BMC Musculoskeletal Disorders / Issue 1/2022
Electronic ISSN: 1471-2474
DOI
https://doi.org/10.1186/s12891-022-05014-4

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