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Year 2017 - Volume 37, Number 12
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Histological and histomorphometric evaluation of bone regeneration with biomaterial in the tibia of sheep, 37(12):1537-1544
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ABSTRACT.- Paretsis N.F., Arana-Chavez V.E., Correa L., Peplis A.M.G., Martins V.C.A., Cortopassi S.R.G. & Zoppa A.L.V. 2017. [Histological and histomorphometric evaluation of bone regeneration with biomaterial in the tibia of sheep.] Avaliação histológica e histomorfométrica da regeneração óssea a partir da utilização de biomateriais em tíbias de ovinos. Pesquisa Veterinária Brasileira 37(12):1537-1544. Departamento de Cirurgia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Prof. Orlando Marquês de Paiva 87, Butantã, São Paulo, SP 0558-270, Brazil. E-mail: nicoleparetsis@gmail.com
Bone defects are commonly found in veterinary medicine through different disease such as trauma, especially in large animals. Frequently it is necessary to assist this tissue repair for better regeneration. Biomaterials in general are designed to this function. In order to understand the bone cells in the presence of bone substitutes, tests in vivo are essential for these studies. The quantity and quality of new tissue formation can be assessed by observation of tissue morphofunctional unit. Currently, in orthopedic studies sheep are considerated animals of choice for experimental development. Bone defects were performed experimentally in sheep and were implanted chitosan, hydroxyapatite and collagen biomaterials. After 60 days, biopsy was performed at the site of tissue repair and the new tissue formation was described, evaluated and compared by organic matrix bone histomorphometry and electronic transmission microscopy. After hystomorfometry analysis there was no difference between control group and biomaterial group, but when compare with pre-existent tissue, the values are smaller. In descriptive analysis was observed intimate contact with biomaterial and new tissue formation suggesting biocompatibility. It observed the pattern of tissue repair in control group and biomaterial group did not differ in the architecture tissue. However, in the biomaterial group was identified presence of the biomaterial in the specimen. All these data suggest that the biomaterial did not impair bone regeneration, had good biocompatibility and potential to assistant in orthopedic routine of large animals. |
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