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33rd Annual Scientific Meeting proceedings
Stream:
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Session: Orthopaedic Short Communications
Date/Time: 05-07-2024 (17:15 - 17:30)
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Location: Auditorium 1
Canine morphological symmetry of the femur and tibia using three dimensional analysis
Gines JA*1, Gill NK2
1School of Veterinary Medicine, Louisiana State University, Baton Rouge, USA, 2Matthew J Ryan Veterinary Hospital, University of Pennsylvania, Philadelphia, USA.
Objectives:
In canine orthopedics, the contralateral bone is routinely used as a reference for clinical application under the assumption that bilateral symmetry is present. The objective of this study was to evaluate the morphological symmetry between contralateral femurs and tibiae using advanced computer technology.
Methods:
Ethical approval IACUC-AM-21-057 for cadaver use. Three-dimensional (3D) bone models of femurs and tibiae from computed tomography of 15 medium sized canine cadavers, with no orthopedic conditions, were obtained. Each 3D bone model was composed by a mesh of thousands of vertices. The maximum distance between vertices on each 3D model was set to 0.2mm. For each pair, left and right bone models, one was randomly mirrored for symmetry analysis. Distance between closest vertices for each specific point in the bone model and the mirrored contralateral bone model was measured (symmetry difference). Also, each bone model was divided into 3 sections (proximal, middle and distal) and the same measurements were obtained. Descriptive analysis, normality test and one-way ANOVA were used (p<0.05).
Results:
The mean number of vertices measured for each femur and tibia were 399,029 and 340,995 respectively. The mean symmetry difference in the femur was 0.304±0.083mm and 0.258±0.053mm in the tibia. The 95% coefficient of interval was [0.303,0.306] for the femur and [0.257,0.259] for the tibia. No differences between all three sections of the femurs (p=0.87) and tibiae (p=0.77) were found.
Conclusions:
The contralateral femur and tibia in dogs with no orthopedic conditions are morphologically symmetrical and can be used as a reference for clinical applications.
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