Computerized measurements of radiographic anatomical parameters of the elbow joint in Bernese Mountain Dogs.

OBJECTIVE Comparison of two methods for evaluation of anatomical parameters of elbow joints in Bernese Mountain Dogs. STUDY DESIGN Radiographic analysis. ANIMALS Nine hundred and thirty-one radiographs of elbow joints from 305 Bernese Mountain Dogs. MATERIAL AND METHODS The angles OL, PA, RA and UL were measured according to the Mues method and the Radius of the humeral condyle, Opening angle beta, Quotient Q and Ae, Area X, Step 1 and Step 2 according to the Viehmann method. The radiographs were divided according to their angle of flexion into five groups: 0-30°, 31-60°, 61-90°, 91-120° and >120°. The difference and the correlation between measured values and the elbow dysplasia (ED) score was calculated and compared. RESULTS The average values of angle OL, PA and RA, Area X, Step 1 and Step 2 were significantly different within the different elbow flexion angle groups. The values of Opening angle beta, Quotients Q and Ae as well as Radius of the humeral condyle varied independently from the degree of the elbow flexion on the radiograph. The angles OL, PA and RA and the Radius of the humeral condyle, the Opening angle beta, the Quotients Q and Ae, Step 1 and Step 2 correlated with the ED score. CONCLUSION In contrast to the method of Mues, the majority of the measured parameters of the method of Viehmann were not influenced by the degree of flexion of the elbow joint and correlated with the ED score. CLINICAL RELEVANCE The method of Viehmann warrants consideration for the evaluation of radiographs of elbow joints in the Bernese Mountain Dog for ED.