Normal CFJ S of Labradors revealed greater lateral and dorsal AFH coverages compared to German Shepherds. In Labradors, the inclination angle was greater in near-normal versus normal CFJ S. Lateral AFH coverage was greater in normal versus near-normal CFJ S of both breeds. In German Shepherds, lateral AFH coverage (CE angle and NA) was greater in normal versus near-normal hip joints whereas, dorsal AFH coverage did not differ between the two groups. In Labradors, CE angle (lateral coverage) and dorsal AFH coverage area index (dorsal coverage) were greater in normal versus near-normal CFJ S. A Spearman correlation coefficient determined the relationship between selected variables. Variables were compared between groups using an unpaired, two-tailed t-test. The width and area of dorsal AFH coverage were standardized by the corresponding femoral head diameter and area. CE angle and AS angle were modified from previously described human techniques. Center-edge (CE) angle, Norberg angle (NA), indices of dorsal AFH coverage width and area, acetabular slope (AS) angle, and inclination angle were determined for each group. Investigated groups were categorized as normal and near-normal CFJ S according to the morphometric criteria established by the FCI scoring system. The purpose of the study is to objectively compare the conformation of normal and near-normal coxofemoral joints (CFJ S) in Labrador Retrievers versus German Shepherds on the extended ventrodorsal radiograph. Canine hip dysplasia (CHD) is a multifactorial disease affecting large breed dogs with associated joint laxity and incongruity that predisposes them to osteoarthritis.
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