Funded in part by the Dean's Fund for Clinical Excellence, Department of Clinical Sciences, Cornell University.
Original Article - Clinical
Evaluation of Tibial Torsion in Yorkshire Terriers with and without Medial Patellar Luxation
Article first published online: 30 NOV 2012
© Copyright 2012 by The American College of Veterinary Surgeons
Volume 41, Issue 8, pages 966–972, November 2012
How to Cite
Fitzpatrick, C. L., Krotscheck, U., Thompson, M. S., Todhunter, R. J. and Zhang, Z. (2012), Evaluation of Tibial Torsion in Yorkshire Terriers with and without Medial Patellar Luxation. Veterinary Surgery, 41: 966–972. doi: 10.1111/j.1532-950X.2012.01041.x
Presented in part at the Annual ACVS Symposium, Seattle WA, October 19–23, 2010.
- Issue published online: 30 NOV 2012
- Article first published online: 30 NOV 2012
- Manuscript Accepted: JUN 2012
- Manuscript Received: SEP 2010
- Dean's Fund for Clinical Excellence, Department of Clinical Sciences, Cornell University
To determine if medial patellar luxation (MPL) in Yorkshire Terriers is associated with tibial torsion.
Prospective cross-sectional study.
Yorkshire Terriers (n = 30; 60 tibiae).
Each MPL was graded using a categorical grading scheme. Computed tomography of the tibiae was performed and tibial torsion angle (TTA) was assessed. MPL grade was analyzed with a general linear model where the independent variables include sex, neutering status, age, weight, and TTA.
Factors that had collective impact on MPL grade were TTA, age, and weight squared. As MPL grade increased, TTA decreased by 0.05° and age increased by 0.13 years. As weight increased, MPL decreased. There was no effect (P > .05) from scorers, side, and neutering status.
Body weight squared, TTA, and age affect MPL grade, suggesting that a torsional deformity may contribute to the development of MPL in Yorkshire terriers along with weight and age.