Radiographic parameters of hip dysplasia in Rottweilers

In this study, 139 radiographs of the Rottweiller breed dog, 44 males and 95 females were evaluated. Radiographs were classified by the degree of hip dysplasia, and we measured the angle of inclination, Norberg angle, the cortical index and percentage of coverage of the femoral head on both sides. The aim of this study was to evaluate that parameters based on gender and age of animals correlating them with the incidence and severity of hip dysplasia. In dysplastic dogs the mean Norberg angle was 100.09 ± 7.86 °, the mean percent coverage of the femoral head was 41.50 ± 8.59%, the mean femoral cortical index was 0.33 ± 0.04, and the femoral angle mean was 153.06 ± 9.81 °. Higher inclination angles were associated with smaller angles of Norberg and lowest percentage of coverage of the femoral head. In this study gender, cortical index and angle of inclination did not show any association with the DCF.

本研究共评估139份罗威纳犬（Rottweiller）的X光影像，受试犬只中雄性44只、雌性95只。研究人员依据髋关节发育不良（hip dysplasia）的程度对X光影像进行分级，并测量了双侧的髋臼倾斜角、诺伯格角（Norberg angle）、骨皮质指数（cortical index）以及股骨头覆盖率（percentage of coverage of the femoral head）。本研究旨在基于受试动物的性别与年龄对上述参数进行评估，并将其与髋关节发育不良的发病率及严重程度进行相关性分析。在患有髋关节发育不良的犬只中，诺伯格角平均值为100.09 ± 7.86°，股骨头覆盖率平均值为41.50 ± 8.59%，股骨骨皮质指数平均值为0.33 ± 0.04，股骨倾斜角平均值为153.06 ± 9.81°。髋臼倾斜角越大，诺伯格角越小，股骨头覆盖率也越低，二者存在相关关系。本研究中，性别、骨皮质指数及髋臼倾斜角未表现出与DCF的相关性。