Original Article - Research
Resistance to Subsidence of an Uncemented Femoral Stem After Cerclage Wiring of a Fissure
Version of Record online: 19 JUL 2011
© Copyright 2011 by The American College of Veterinary Surgeons
Special Issue: Advances in Hip Dysplasia
Volume 41, Issue 1, pages 163–167, January 2012
How to Cite
McCulloch, R. S., Roe, S. C., Marcellin-Little, D. J. and Mente, P. L. (2012), Resistance to Subsidence of an Uncemented Femoral Stem After Cerclage Wiring of a Fissure. Veterinary Surgery, 41: 163–167. doi: 10.1111/j.1532-950X.2011.00858.x
- Issue online: 23 JAN 2012
- Version of Record online: 19 JUL 2011
- Manuscript Accepted: JUL 2010
- Manuscript Received: MAR 2010
To compare: (1) the force required to initiate subsidence, and (2) the relative subsidence, of femoral stems implanted into intact femora, and then into the same femora in which an induced fissure had been stabilized by cerclage.
In vitro, mechanical study.
Femora (n=9) from 9 dogs.
Femora were prepared for implantation of an uncemented stem. Stems were implanted with continuous and impact loading. After axial loading until a fissure occurred, the stems were extracted, and the fissure stabilized with double-loop cerclage. Stems were reimplanted, and reloaded to failure.
Mean±SD load to initiate subsidence in intact femora was 1706±584 N compared with 2379±657 N for cerclaged bones (P=.002). Mean relative subsidence of intact femora was 3.99±2.09 mm compared with 1.79±2.99 mm for cerclaged bones (P=.091).
The load to initiate subsidence is increased in femora that have fissured, then have been stabilized with double-loop cerclage, when compared with intact femora. The relative subsidence is not different between intact and stabilized specimens.