Radiographic assessment of the proximal tibial angles in dogs and cats with and without cranial cruciate ligament rupture

Abstract

The influence of the proximal tibial angles in the cranial cruciate ligament (CCL) rupture in dogs is still controversial, and little is known regarding this topic in cats. The aim of this study was to evaluate and compare the angles of the proximal portion of the tibia in dogs and cats with and without CCL rupture. Retrospective and prospective radiographs of the stifle joints were obtained and divided into four groups. Group 1 was composed of 70 stifle joint images of dogs without orthopedic disorders (healthy dogs), group 2 had 70 stifle joint images of dogs with CCL rupture, group 3 had 50 stifle joint images of cats without orthopedic disorders (healthy cats) and group 4 had 25 stifle joint images of cats with CCL rupture. Radiographs were taken with the stifle joint in the mediolateral projection, positioned at the angle of hind limb support. Between the two groups of dogs evaluated, the dogs with CCL rupture had statistically greater tibial plateau angle (TPA) compared with healthy dogs. No difference was shown in relation to the TPA between healthy cats and cats with CCL rupture. In relation to the patellar ligament angle by tibial plateau method the values for the healthy dogs were significantly higher than those for the CCL ruptured dogs. Similarly, healthy cats had significantly higher mean values than cats with CCL rupture. In the patellar ligament angle by common tangent method there was no significantly difference between the two groups of dogs. Between the two groups of cats, animals with CCL rupture had statistically higher mean values than healthy cats. In general, the groups of dogs showed higher mean values than the groups of cats. For the patellar ligament insertion angle (PLIA) healthy dogs showed a significantly higher mean than dogs with CCL rupture. There was no significant difference between the groups of cats. In conclusion, the TPA and the PLIA possibly influence the etiology of CCL rupture in dogs but not in cats. The low patellar ligament angle measured by common tangent method may favorably influence the reduced incidence of CCL rupture in cats.

Comparative forelimb myology and muscular architecture of a juvenile Malayan tapir (Tapirus indicus)

“…; Arruda et al. ). Significant differences in pennation angle were tested for between the lower forelimb flexors (FDS + P, FCU, FCR) and extensors (UL, ECR).…”

“…Comparing pennation angles allowed for comparisons of potential force transmission to the tendons in the forelimb muscles (Brown et al 2003). Within the tapir limb itself, one-way analyses of variance (ANOVAs) and Tukey-B post-hoc tests were performed to test for significant differences between pennation angles (following successful normality testing using Shapiro-Wilk test; Lang et al 2012;Hady et al 2015;Arruda et al 2018). Significant differences in pennation angle were tested for between the lower forelimb flexors (FDS + P, FCU, FCR) and extensors (UL, ECR).…”

Analgesia e anestesia em gatos acometidos por fraturas e cirurgias ortopédicas: uma revisão

“…As diferenças clínicas, anatômicas e fisiológicas existentes entre gatos e cães demandam procedimentos específicos (Grimm et al, 2017;Mathews et al, 2018). Em geral, os ossos dos gatos são mais retos e delgados em relação aos ossos dos cães, os ângulos do ligamento patelar dos gatos são reduzidos em relação aos observados em cães (Arruda et al 2018) e a capacidade dos felinos em metabolizar esses fármacos é limitada em relação a capacidade dos cães (Grimm et al, 2017).…”