[Biomechanical analysis of the normal knee and with cranial cruciate ligament rupture to the cranial translation degree and articular stiffness in dogs].
OBJECTIVE
To analyse the biomechanical function of the knee joint in dogs, comparing the cranial translation degree and articular stiffness of the tibia in relation to the femur, in normal joints and joints with rupture of cranial crucial ligament.


METHODS
Ten mongrel dog knees were analyzed, weighting more than 20 kg. Biomechanical analysis to the cranial translation degree of the knee joint with normal cranial cruciate ligament and surgically sectioned was made. Mechanical assays was realized by Kratos 5002 machine, and recorded in real time the parameters of force (N) and translation/deformation, in mm. The assay had consisted in to use a force(N) registering the cranial translation.


RESULTS
To the normal knee, the dislocation media founded after 3 repetitions was 3,39 ; 3,47; 3,53. To the knee with surgical section was 12,96; 13,24; 13,34. The statistical analysis revealed significant difference between groups to the cranial translation and articular stiffness (p<0.05).


CONCLUSIONS
These study allows to conclude that the cranial translation is added in four times and the articular stiffness is reduced one and a half times when statistically compared.
Faculdade de Medicina Veterinária e Zootecnia, USP.
Leandro
L
Romano
Cezar Augusto Martins
CA
Pereira
Alexandre
A
Schmaedecke
João Paulo Elsen
JP
Saut
Cássio Ricardo Auada
CR
Ferrigno
D000818:Animals; D016118:Anterior Cruciate Ligament / Q000502:physiology; D000070598:Anterior Cruciate Ligament Injuries; D001696:Biomechanical Phenomena; D004285:Dogs; D005260:Female; D007593:Joint Instability / Q000503:physiopathology / Q000662:veterinary*; D008297:Male; D012421:Rupture / Q000662:veterinary; D013264:Stifle / Q000293:injuries* / Q000502:physiology / Q000601:surgery