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J Vet Sci 2018; 19(5): 699-707  https://doi.org/10.4142/jvs.2018.19.5.699
Cranial cruciate ligament structure in relation to the tibial plateau slope and intercondylar notch width in dogs
Michal Kyllar1,2,*, Petr Čížek1
1Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences Brno, 612 42 Brno, Czech Republic
2Companion Care, Broadstairs CT10 2RQ, United Kingdom
Correspondence to: Tel: +44-420604206455; Fax: +44-01843608431; E-mail: kyllarm@vfu.cz
Received: April 11, 2018; Revised: May 29, 2018; Accepted: June 10, 2018; Published online: September 30, 2018.
Abstract
Cranial cruciate ligament (CCL) rupture is one of the most common orthopedic conditions in dogs. The pathogenesis of CCL rupture is not fully described and remains to be elucidated fully. Several hypotheses have been proposed to explain the etiology of these changes. The objective of this study was to investigate structural changes in the CCL in relation to the tibial plateau angle (TPA) and the intercondylar notch (ICN) width in dogs. Fifty-five skeletally mature dogs were included in this study. ICN width and TPA measurements were obtained from intact CCL stifles. Samples of the CCL, caudal cruciate ligament (CaCL), and femoral head ligament (FHL) were harvested and stained for routine histological and immunohistochemical analysis. Microscopic changes in the ligaments were observed and were found to correlate with the TPA and ICN width values. The degree of structural changes within the CCL was observed to correlate with an increasing TPA and a narrowing ICN width. Changes in the CCL are likely to be caused by excessive forces acting through the ligament in stifles with a high TPA. Chondroid metaplasia of the CCL is an adaptation to abnormal mechanics within the stifle joint caused by altered bone morphology.
Keywords: arthritis, cranial cruciate ligament, stifle


© 2018 The Korean Society of Veterinary Science.

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