Eficácia da associação de vidro bioativo e plasma rico em plaquetas na reparação óssea em coelhos

AUTOR(ES)

Luiz Alexandre Moura Penteado

FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

29/06/2007

RESUMO

Bone regeneration not only requires a scaffold, but also a sequence of biological events regulated by multiple factors. Nowadays, the platelet-rich plasma (PRP) consists an important source of growth factors. The aim of this study was to evaluate the effectiveness of the association of bioactive glass and PRP in the repairing of surgical defects realized in the parietal bone of rabbits. Ten rabbits New Zealand were used, and on each animal two defects of 8 mm in the parietal bones had been confectioned, which had received different treatments: a) group 1 - bioactive glass (treatment VB) and coagulum (treatment CO); b) group 2 - bioactive glass + PRP (treatment VB + PRP) and isolated PRP (treatment PRP). The animals were sacrificed after 12 weeks, and the specimens were submitted to radiographic (density grey degrees), histological (hematoxilin and eosin coloration) and histomorfometrical (planimetry for counting of points) analysis. The results of radiographic density and histomorfometric were submitted separately to the test of analysis of variance (ANOVA) and Tukeys test (5%). In the treatments PRP + VB and PRP major radiographic bone density and major histomorfometric new bone formation was observed, without statistical difference between them. It did not have statistical difference between treatments VB and CO in relation to the bone density and histomorfometric new bone formation. Histologically, the new bone formation was bigger in the treatments PRP + VB and PRP, emphasizing PRP + VB. Therefore, the PRP supported the bone repairing and the VB does not supported the bone repair separately and does not modified the bone repairing gotten by the PRP.

ASSUNTO(S)

regeneração óssea substitutos ósseos plasma rico em plaquetas bone regeneration bone substitutes platelet-rich plasma periodontia

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