Department of Anatomy, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Türkiye.
Department of Animal Breeding & Husbandry, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Türkiye.
Anat Histol Embryol. 2024 Jul;53(4):e13092. doi: 10.1111/ahe.13092.
The ossa coxae are the bones that connect the hindlimbs to the axial skeleton. The right and left os coxae join at the median plane to form the pelvis. In this study, variations in pelvis shape and the asymmetric structure of the pelvis were investigated across different classes of dogs. To achieve this, computed tomography images of the pelvis were obtained from 35 dogs, and 3D modelling of the pelvis was created. Subsequently, 45 landmarks were identified on these models. As a result of the Principal Component Analysis, the shape variation was observed in the pelvic canal and crista iliaca. Directional asymmetry between Principal Component 1 and Principal Component 2 accounted for 33.84% of the total variation, while fluctuating asymmetry contributed 23.66%. Canonical variate analysis revealed that canonical variate (CV) 1 explained 56.56% of the total variation between groups, with CV 2 explained 28.98%. Male dogs exhibited greater pelvic variation than females. Procrustes ANOVA indicated that the greatest proportion of shape variation corresponds to the effect of differences among individuals. While directional asymmetry was statistically significant, fluctuating asymmetry was not. Male dogs displayed more pronounced pelvic shape asymmetry, typically towards the right. Gundogs had a narrower pelvic canal and a wide crista iliaca, whereas terriers had a wider pelvic canal and smaller crista iliaca in shape. Geometric morphometry enables statistical analysis and the derivation of average shapes from samples, making it a vital tool in veterinary anatomy. This study provides insights into pelvic geometric morphometry across different classes of dogs.
骨盆是连接后肢和轴骨骼的骨骼。左右髋骨在正中面连接形成骨盆。在这项研究中，研究了不同犬类之间骨盆形状的变化和骨盆的不对称结构。为此，从 35 只狗中获得了骨盆的计算机断层扫描图像，并对骨盆进行了 3D 建模。随后，在这些模型上确定了 45 个标志点。主成分分析结果表明，骨盆管和髂嵴的形状发生了变化。主成分 1 和主成分 2 之间的方向不对称性占总变异的 33.84%，而波动不对称性占 23.66%。典型变量分析表明，典型变量 1 解释了组间总变异的 56.56%，典型变量 2 解释了 28.98%。雄性犬的骨盆变化大于雌性犬。Procrustes ANOVA 表明，形状变化的最大比例对应于个体差异的影响。虽然方向不对称具有统计学意义，但波动不对称则没有。雄性犬的骨盆形状不对称更为明显，通常偏向右侧。枪猎犬的骨盆管较窄，髂嵴较宽，而梗犬的骨盆管较宽，髂嵴较小。几何形态测量学可以对样本进行统计分析和平均形状的推导，是兽医解剖学的重要工具。本研究为不同犬类的骨盆几何形态测量学提供了深入了解。
