In Vitro Biomechanical Comparison of Locking Compression Plate Fixation and Limited-Contact Dynamic Compression Plate Fixation of Osteotomized Equine Third Metacarpal Bones

To compare monotonic biomechanical properties and fatigue life of a broad locking compression plate (LCP) fixation with a broad limited contact dynamic compression plate (LC-DCP) fixation to repair osteotomized equine third metacarpal (MC3) bones. In vitro biomechanical testing of paired cadaveric e...

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Bibliographic Details
Published in:Veterinary surgery 2008-04, Vol.37 (3), p.283-288
Main Authors: SOD, GARY A, MITCHELL, COLIN F, HUBERT, JEREMY D, MARTIN, GEORGE S, GILL, MARJORIE S
Format: Article
Language:English
Subjects:
Anatomy & physiology
Animals
bending strength
Biomechanical Phenomena
bone fractures
Bone Plates - veterinary
Bone surgery
Cadaver
Comparative studies
Compressive Strength
dynamic compression plate
Equipment Failure - veterinary
fatigue strength
fracture fixation
Fracture Fixation, Internal - instrumentation
Fracture Fixation, Internal - methods
Fracture Fixation, Internal - veterinary
Fractures
Horses
in vitro studies
Internal Fixators - veterinary
loads
locking compression plate
materials testing
Metacarpal Bones - injuries
Metacarpal Bones - surgery
metacarpus
Movement
new methods
osteotomy
Osteotomy - methods
Osteotomy - veterinary
Prostheses
Random Allocation
screws
surgery
torsional strength
Veterinary services
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Summary:To compare monotonic biomechanical properties and fatigue life of a broad locking compression plate (LCP) fixation with a broad limited contact dynamic compression plate (LC-DCP) fixation to repair osteotomized equine third metacarpal (MC3) bones. In vitro biomechanical testing of paired cadaveric equine MC3 with a mid-diaphyseal osteotomy, stabilized by 1 of 2 methods for fracture fixation. Cadaveric adult equine MC3 bones (n=12 pairs). MC3 were divided into 3 groups (4 pairs each) for: (1) 4-point bending single cycle to failure testing; (2) 4-point bending cyclic fatigue testing; and (3) torsional single cycle to failure testing. The 8-hole, 4.5 mm LCP was applied to the dorsal surface of 1 randomly selected bone from each pair. One 8-hole, 4.5 mm LC-DCP) was applied dorsally to the contralateral bone from each pair. All plates and screws were applied using standard ASIF techniques. All MC3 bones had mid-diaphyseal osteotomies. Mean test variable values for each method were compared using a paired t-test within each group. Significance was set at P
ISSN:0161-3499
1532-950X
DOI:10.1111/j.1532-950X.2008.00378.x