RESUMO
OBJECTIVE: To investigate the correlation between radiographic hip grade and kinetic parameters in German shepherd dogs. METHODS: Dogs were distributed into five groups of eight dogs each according to hip grade (A, B, C, D or E). Dogs were submitted to clinical evaluation and kinetic analysis. Five valid passages were analysed using data collected from a pressure walkway. Peak vertical force, vertical impulse and stance phase duration were evaluated at velocity (1 · 2 to 1 · 4 m/s) ±0 · 1 m/s(2) acceleration. Kinetic data between groups were compared. RESULTS: In pelvic limbs, mean peak vertical force decreased progressively from grade C (mild) to grade E (severe) hip dysplasia. The vertical impulse was decreased in groups C and E compared to groups A, B and D; stance phase duration did not differ significantly between groups. CLINICAL SIGNIFICANCE: Mean peak vertical force was lower in dogs with severe hip dysplasia compared with mildly dysplastic dogs. These results suggest that hip dysplasia degree can affect lameness severity.
Assuntos
Cães/fisiologia , Articulação do Quadril/fisiologia , Animais , Fenômenos Biomecânicos/fisiologia , Feminino , Displasia Pélvica Canina/etiologia , Displasia Pélvica Canina/fisiopatologia , Articulação do Quadril/diagnóstico por imagem , Masculino , RadiografiaRESUMO
OBJECTIVE: To evaluate vertical forces in the pads of German Shepherd dogs by relative percentage among total limb vertical forces using a pressure sensitive walkway. PROCEDURE: A pressure sensitive walkway was used to collect vertical force data for each pad of the limbs of 16 healthy client-owned German Shepherd dogs used for kinetic gait analysis. The vertical force for each pad was evaluated as a percentage of total limb vertical force. Weight distribution among limbs was also recorded. Velocity and acceleration were within a range of 1.3 and 1.6 ± 0.1 m/s². The ANOVA test was used to compare data and the paired t-test was used to assess symmetry (p <0.05). RESULTS: The peak vertical force was higher on the metacarpal pad than on the metatarsal pad. Peak vertical force was highest on the metacarpal pad and metatarsal pad followed by the digital pads 3, 4 and 5 of the forelimb, and on the hindlimb by digital pads 3 and 4. Vertical impulse was greatest in the metacarpal pad and digital pads 3 and 4 of the forelimb and hindlimb respectively, followed by digital pads 3, 4, and 5 of the forelimb and the metatarsal pad. CONCLUSION AND CLINICAL RELEVANCE: A vertical force distribution pattern was observed on the pads of the German Shepherd dogs. These data are important for improving the understanding of vertical force distribution during gait and to assess orthopaedic conditions.