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International Orthopaedics
Published in: International Orthopaedics 8/2012

01-08-2012 | Original Paper

Higher stability with locking plates in hand surgery? Biomechanical investigation of the TriLock system in a fracture model

Authors: Stefanie Doht, Hendrik Jansen, Rainer Meffert, Sönke Frey

Published in: International Orthopaedics | Issue 8/2012

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Abstract

Purpose

The aim of this study was to determine the biomechanical characteristics of locking plates with the TriLock system with different design and screw settings compared to a non-locking plate in a diaphyseal metacarpal fracture.

Methods

Oblique diaphyseal shaft fractures in porcine metacarpal bones were created in a biomechanical fracture model. After reduction they were fixed with three different locking plates with the TriLock interlocking mechanism or a non-locking linear plate in mono- or bicortical screw fixations. In load to failure tests the maximum load and stiffness were measured.

Results

For linear plates, the maximum load was higher for the non-locking plate compared with the locking plate. The maximum load could be increased for the locking plates using a double-row design and a higher screw number. No differences were found for the stiffness between all groups. In contrast to the non-locking plate, the mode of failure of the locking plates in many cases (86 %) was a loss of the interlocking mechanism.

Conclusions

The results suggest that the locking plates with the TriLock system achieve no higher stability compared to a non-locking plate in load to failure tests. Adaptions to increase the stability of the interlocking mechanism are desirable.
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Metadata
Title
Higher stability with locking plates in hand surgery? Biomechanical investigation of the TriLock system in a fracture model
Authors
Stefanie Doht
Hendrik Jansen
Rainer Meffert
Sönke Frey
Publication date
01-08-2012
Publisher
Springer-Verlag
Published in
International Orthopaedics / Issue 8/2012
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-012-1524-7

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