Estudo histométrico do ligamento cruzado cranial de cão (Canis familiaris) | Histhometric study of the dog cranial cruciate ligament (Canis familiaris)

Portuguese. Estudo-se o ligamento cruzado cranial de 30 cães, quantificando a proporção de fibras colágenas, reticulares e elásticas em 3 regiões, correspondentes à sua origem no fêmur, ao fragmento médio proximal e à inserção na tíbia. Os dados coletados foram confrontados com idade e peso dos animais. A média da proporção de fibras colágenas foi de 43%; fibras reticulares 16,28% e fibras elásticas 7,35%. Não existiu diferença significativa entre as 3 regiões ou entre estas regiões e a média do ligamento como um todo, quando confrontado os dados dos grupos separados por peso, mas ao separá-los conforme a idade observamos diferença muito significativa na proporção de fibras reticulares, a qual sofreu decréscimo progressivo diretamente proporcional com o avançar da idade.

English. The cranial cruciate ligament was studied in 30 dogs, where proportion of fibers collagen, elastic and reticulin were measured in 3 segments: femoral insertion, median segment and tibial insertion. The results were analyzed with confrontation of age and body weight. The data were statistically analyzed by means of ANOVA, "t"Student and correlation test. The results draw to the following conclusions: 1- ) The mean of fibers collagen proportion was 43%, elastic fibers was 7,35% and and reticulin fibers proportion was 16, 28%. 2 -) There was no difference between the 3 regions, 3.) By confrontation among reticulin fibers proportion measurements with the age, a high intensity correlation was observed, as older dog, less reticulin fibers proportion was found. 4 -) There was no significant differences among the ligament fibers proportion data concerning the body weight.