A comparison of conventional compression plates and locking compression plates using cantilever bending in an ilial fracture model

C. W. Bruce; T. W. G. Gibson; R. J. Runciman

doi:10.3415/VCOT-14-01-0001

Veterinary and Comparative Orthopaedics and Traumatology, Table of Contents

Vet Comp Orthop Traumatol 2014; 27(06): 430-435
DOI: 10.3415/VCOT-14-01-0001

Original Research

Schattauer GmbH

A comparison of conventional compression plates and locking compression plates using cantilever bending in an ilial fracture model

Authors

C. W. Bruce

¹Alta Vista Animal Hospital, Department of Specialty Surgery, Ottawa, Ontario, Canada
T. W. G. Gibson

²Ontario Veterinary College, Department of Clinical Studies
R. J. Runciman

³School of Engineering, University of Guelph, Guelph, Ontario, Canada

Abstract

Summary

Objectives: The purpose of this study was to compare the stiffness, yield load, ultimate load at failure, displacement at failure, and mode of failure in cantilever bending of locking compression plates (LCP) and dynamic compression plates (DCP) in an acute failure ilial fracture model. Our hypothesis was that the LCP would be superior to the DCP for all of these biomechanical properties.

Methods: Ten pelves were harvested from healthy dogs euthanatized for reasons unrelated to this study and divided into two groups. A transverse osteotomy was performed and stabilized with either a 6-hole DCP applied in compression or a 6-hole LCP. Pelves were tested in cantilever bending at 20 mm/min to failure and construct stiffness, yield load, ultimate load at failure, displacement at failure, and mode of failure were compared.

Results: The mean stiffness of DCP constructs (193 N/mm [95% CI 121 – 264]) and of LCP constructs (224 N/mm [95% CI 152 – 295]) was not significantly different. Mean yield load of DCP constructs (900 N [95% CI 649 –1151]) and of LCP constructs (984 N [95% CI 733 –1235]) was not significantly different. No significant differences were found between the DCP and LCP constructs with respect to mode of failure, displacement at failure, or ultimate load at failure.

Clinical significance: Our study did not demonstrate any differences between DCP and LCP construct performance in acute failure testing in vitro.

Keywords

LCP - DCP - locking compression plate - dynamic compression plate - canine ilium - cantilever bending - bone quality

Full Text

References

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