جستجوی مقالات مرتبط با کلیدواژه « ossification centers » در نشریات گروه « دامپزشکی »

The aim of this study was to determine the age of physical maturity and evaluation of radiology and histology of hind limb ossification centers in pigeon.
Design: Fundamental study.
Animals: 14 pigeons.
Procedures: These pigeons were cultivated in identical and standard conditions and radiological and histological tests performed every 7 days to 91 days.
Based on the results of radiology and histology, the hind limb skeletal differentiation in pigeons with the appearance of centers of immature cartilages in diaphyses of the femur, tibiotarsus and tarsometatarsus at the end of the first week and the fibula bone at the end of the third week began. Growth sequences in the femur, tibiotarsus, fibula, tarsometatarsus and digits were observed during different stages. The maximum growth of these bones was related to the periods of maximum cartilage activity and their bone formation, and the femur holds steady its growth relation to the length of the skeletal body of the hind limb, although at the end of the fifth week its growth slowed down. The histological findings were based on the examination of the proximal extremity of the femur. The tissue samples at one day were lack of bone marrow and the bone marrow begins to form at the end of the first week. The presence of epiphyseal growth plate in samples and its bone formation was confirmed on the basis of radiology early in the fifth week.
Conclusion and Clinical Relevance: According to this study, the best time to complete the development of bone formation and the formation of all parts of the hind limb skeleton of the pigeon is probably 35 days after the hatch.

The growth and differentiation of skeletal pectoral limb girdle, wing and the ossification centers in these regions after hatching were investigated in some groups of quails.
The aim of this study was to determine the age of physical maturity and radiological and histological assessment of the ossification centers of pectoral limb in quail.
14 quails after hatching were reared in similar and standard conditions and sampled once every 7 days to 90 days.
According to radiological and histological results, differentiation of the wing in quail commences with the appearance of centers of undeveloped cartilages in diaphyseal humerus, radius, and ulna at the end of 7 days, and also carpal regions at the beginning of the 14 days. The growth sequence in humerus, radius, ulna, carpus, metacarpus, and digits are observed in various stages that the high growth is related to the maximum cartilaginous activity and their ossification stages and humerus keeps its growth connection constant with the length of the whole wing skeletal, although its growth scale lessens after 21th day. The histological results were evaluated based on prepared tissue sample from the proximal humeral portion. Lack of bone marrow was observed in the all 1th day`s tissue samples and bone marrow conformation was commenced after 7th day. The growth plate was not observed in the all samples and this issue is complementary to the information obtained from radiographic examination.
According to this study, complete the ossification process and the formation of all parts of pectoral limb girdle and wings in the quails is 70 days after hatching.