Abstract
ABSTRACT Femoral angle, femur length, and hip width were measured in radiographs of 92 intact domestic cats, males and females of mixed breed from the Center for Zoonosis Control of the Federal District. The animals showed no trauma, orthopedic diseases or angular deformities and had closed physeal lines. Accordingly, we measured aLPFA (anatomical lateral proximal femoral angle, aLDFA (anatomical lateral distal femoral angle), mLPFA (mechanical lateral proximal femoral angle), mLDFA (mechanical lateral distal femoral angle), IA (femoral inclination angle), FL (femur length) and HW (hip width) using ventrodorsal radiographs, with both hindlimbs in a single exposure to an X-ray beam centered on the hip. The mean values of the variables were: mLPFA: 82.5±3.62°; aLPFA: 80.1±4.29°; mLDFA: 96.1±3.51° (males) and 97.3±2.05° (females); aLDFA: 94,3±3.43°; IA: 136.6±3.86°; FL: 12.9±0.55cm (males) and 13.4±0.66cm (females); and HW: 3.1cm±0.23 (males) and 3.5±0.26cm (females). These values will serve as a reference for the diagnosis of angular deformities and as support for planning corrective osteotomies in domestic cats.
Highlights
The use of ventrodorsal radiographs makes it possible to assess the mechanical and anatomical axes of long bones and their articular orientationCorrective osteotomies are usually performed to treat misalignment of the pelvic limb, and it is crucial to perform preoperative planning when treatment success is desired (Tomlinson et al, 2007).Angular deviations have been recorded in British Shorthaired, Devon Rex and Siamese cats and in a variety of mixed breeds, and can mainly cause patellar dislocations (Denny; Butterworth, 2006)
Considering the growth of the population of cats and how much knowledge can still be gained to improve the quality of life and longevity of this species, the aim of this work was to determine a normal reference range for the variables aLPFA
Ninety-two animals were X-rayed and 184 angles were measured; the values are given in Tables 1 and 4, corresponding to the descriptive analysis of the angles mLPFA, aLPFA, mLDFA, aLPFA and IA and Femur length (FL) and Hip width (HW)
Summary
The use of ventrodorsal radiographs makes it possible to assess the mechanical and anatomical axes of long bones and their articular orientationCorrective osteotomies are usually performed to treat misalignment of the pelvic limb, and it is crucial to perform preoperative planning when treatment success is desired (Tomlinson et al, 2007).Angular deviations have been recorded in British Shorthaired, Devon Rex and Siamese cats and in a variety of mixed breeds, and can mainly cause patellar dislocations (Denny; Butterworth, 2006). Considering the growth of the population of cats and how much knowledge can still be gained to improve the quality of life and longevity of this species, the aim of this work was to determine a normal reference range for the variables aLPFA (anatomical lateral proximal femoral angle, aLDFA (anatomical lateral distal femoral angle), mLPFA (mechanical lateral proximal femoral angle), mLDFA (mechanical lateral distal femoral angle), IA (femoral inclination angle), FL (femur length) and HW (hip width) in cats These values can be of help for the diagnosis and planning of corrective surgeries
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