Avaliação Radiográfica e Bioquímica do Fechamento da Placa Epifisária Distal do Rádio de Asininos (Equus asinus) usados para tração animal.

Abstract

The mature bone can be assessed by the radiological examination of the growth plate responsible for longitudinal growth of long bones. After its birth, the degree of plate closure is an accurate indication of the skeletal evolution and reflects bone maturity. This study evaluated the influence of animal activity traction on the epiphyseal closure plate relating it with the serum levels of bone biomarkers such as: osteocalcin, alkaline phosphatase, calcium and phosphorus in the species Equus asinus, for a period of 21 months. A total of 40 donkeys, aged from 07 and 08 months, male and female mongrel from different São Luís neighborhoods with the same feed management and, after clinical examination were divided into two study groups, and the animals group control was made by non active traction (NAT) and those who were active (AT). Radiographs of the right radius distal in craniotail view were taken monthly to monitor and evaluate the degree of closure of the plate, and then sorting it into "C", when the plate was wide open, "B" opened in medial faces and side of the bone shaft and centrally closed and "A" closed completely. Measurements of total serum alkaline phosphatase (Alkp), osteocalcin (Oc), calcium (Ca) and phosphorus (P) were also performed monthly to verify the influence that the process of closure of the epiphyseal plate has on the these values. The results showed that the closure of the epiphyseal plate in ANT group donkeys occurred on average at 25,20 ± 1,70 months and in the TA to 18,35 ± 1,70 months, this difference was statistically significant (P> 0,05). The serum values Alkp, Oc, Ca and P were respectively 155,29 ± 35,69 U / L, 7,29 ± 4,97 ng / ml, 7,79 ± 0,77 mg / dL and 4, 84 ± 0,77 mg / dL for the ANT group and 190,27 ± 41,42 U / L, 8,72 ± 2,45 ng / ml, 7,41 ± 0,71 mg / dL and 4,84 ± 0,92 mg / dL for animals that were engaged in traction. Confirming only significant difference (P> 0.05) in measurements obtained for total alkaline phosphatase. At the end it was concluded that donkeys in the AT group was the first closure of the epiphyseal plate, in the group that did not work reflected further development of the body. In the biochemical study, we observed that only the total alkaline phosphatase showed higher values for the AT group, not verifying statistical differences for the other bone markers evaluated.