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Journal of Orthopaedic Surgery and Research
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Open Access 01-12-2024 | Pelvic Ring Fractures | Research article

Experimental study of fractures of the posterior pelvic ring C1.1 using LC-II screws and internal fixation by plate

Authors: Yu Liu, Xukai Wang, Bin Tian, Hong Yao, Guangyao Liu

Published in: Journal of Orthopaedic Surgery and Research | Issue 1/2024

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Abstract

Introduction

To compare the biomechanical outcomes of C1.1 posterior pelvic ring fractures treated with different numbers of LC-II screws and plate internal fixation.

Materials and methods

Nine adult preserved pelvic specimens were used. After being measured by bone densitometry, the specimens were randomly divided into 3 groups of 3 pelvic specimens each. The C1.1 pelvic fractures were generated by iliac osteotomies and anterior pelvic ring osteotomies. The fractures were fixed and randomly divided into three groups: (1) one LC-II screw, (2) two LC-II screws, and (3) two reconstruction plates. The anterior pelvic rings were all fixed with pubic branch screws. A biomechanical testing machine loaded all specimens vertically, recording the displacement and ultimate load of the specimens to quantify the stiffness.

Results

When loads up to 1000 N were applied, the displacement of the iliac bone was close between the one LC-II screw and the two LC-II screw group specimens; (P > 0.05); when loads such as 1000 N, 1200 N and 1400 N were applied, there was no significant difference in displacement between the plate fixation group and the two LC-II screw fixation group (P > 0.05), both of which were superior to the one LC-II screw fixation group (P < 0.05). There was no significant difference in compressive stiffness between the two LC-II screw fixation groups and the plate fixation group (P > 0.05), and both were superior to the one LC-II screw fixation group (P < 0.05) the ultimate load of both the two LC-II screws and the steel plate is greater than that of one LC-II screw (1.74 times the ultimate load of one LC-II screw for the two LC-II screws and 1.83 times the ultimate load of one LC-II screw for the steel plate).

Conclusion

For posterior pelvic ring fractures of type C1.1, placement of two LC-II screws provides comparable posterior pelvic ring stability compared to reconstructed plates. At loads below 1000 N, one LC-II screw fixation and two LC-II screws were comparable in restoring posterior pelvic ring stability.
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Metadata
Title
Experimental study of fractures of the posterior pelvic ring C1.1 using LC-II screws and internal fixation by plate
Authors
Yu Liu
Xukai Wang
Bin Tian
Hong Yao
Guangyao Liu
Publication date
01-12-2024
Publisher
BioMed Central
Published in
Journal of Orthopaedic Surgery and Research / Issue 1/2024
Electronic ISSN: 1749-799X
DOI
https://doi.org/10.1186/s13018-024-05229-2

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