Work conducted at the Musculoskeletal Laboratory, Royal Veterinary College.
Original Article - Research
A Biomechanical Evaluation of a Hybrid Dynamic Compression Plate and a CastLess Arthrodesis Plate for Pancarpal Arthrodesis in Dogs
Version of Record online: 29 MAY 2012
© Copyright 2012 by The American College of Veterinary Surgeons
Volume 41, Issue 6, pages 738–744, August 2012
How to Cite
Meeson, R. L., Goodship, A. E. and Arthurs, G. I. (2012), A Biomechanical Evaluation of a Hybrid Dynamic Compression Plate and a CastLess Arthrodesis Plate for Pancarpal Arthrodesis in Dogs. Veterinary Surgery, 41: 738–744. doi: 10.1111/j.1532-950X.2012.00985.x
Presented in part at the BVOA Spring Scientific Meeting, Birmingham, UK, 2011
- Issue online: 6 AUG 2012
- Version of Record online: 29 MAY 2012
- Manuscript Accepted: JAN 2012
- Manuscript Received: JUL 2011
- British Veterinary Orthopaedic Association
To determine mechanical differences between two plates with different requirements for supplementary casting after pancarpal arthrodesis (PCA): the Veterinary Instrumentation Hybrid Dynamic Compression Plate (HDCP), and the OrthoMed CastLess Arthrodesis Plate (CLP).
In vitro mechanical analysis.
HDCP(n = 10), CLP(10).
Single-cycle load to failure using a materials-testing machine and cyclic loading between 38 and 380 N ± 5% to simulate estimated in vivo loads until failure or 106 cycles.
Single-cycle to failure: bending stiffness was significantly higher for the HDCP(2269 ± 175 N/mm) than CLP(1754 ± 88 N/mm; P < .001). Bending structural stiffness was higher for the HDCP(3.8 ± 0.3 Nm2) versus CLP(2.9 ± 0.2 Nm2; P= .0022). A difference between the 2 plates for bending strength was not demonstrated; HDCP= 13.9 ± 1.4 Nm, CLP13.2 ± 0.5 Nm (P= .24). Cyclic Loading: no failures occurred with either plate type when plates were cycled to 106 cycles.
There is no mechanical advantage in bending resistance afforded by the CLPover the HDCP. Fatigue failure of either plate during the convalescent period of an estimated 150,000–250,000 cycles is unlikely. Based on the bending performance, there is no evidence to support the use of the CLPover the HDCPfor castless PCA.