Estudo comparativo de materiais de preenchimento osseo sobre o processo de regeneração ossea guiada em defeitos perimplantares : analise histologica e histometrica em femur de coelhos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

The purpose of this study was compare the bone healing after different bone grafting materiais in bone tissue regeneration around implants in rabbit s femur. Forty 6 x 2.6mm titanium implants were placed, bilaterally, in the femur of twenty New Zealand rabbits. Circular defects (2.6mm in diameter) were created at mesial of each femur, in order to expose implant threads. Defects were filled with human demineralized freeze-dried bone (Dembone), rabbit bone-chips autografts (autogenous bone) , bioactive glass granules (Perioglas) and control group filled with blood clot (control). Ali defects were protected with cellulose membranes. Rabitts were sacrificed 3 and 6 weeks after graft placement, the specimens were cut into block sections on a low speed bur and submited to histologic and histometric analysis. Among the graft materiais, autogenous bone and human demineralized freeze-dried bone provided the greatest amount of bone formation (37,8% and 37,1%, respectively) after 3 weeks of healing, with no statistically signifcant difference between them. After 6 weeks, autogenous bone provided the densest and greatest amount bone formation (64,1 %). Between 3 and 6 weeks, the greatest amount of bone formation was provided by autogenous bone grafts, and the control group showed a lesser quantity of bone formation as compared to the grafted groups

ASSUNTO(S)

ossos - regeneração ossos - defeitos histologia coelho como animal de laboratorio bone grafting materials bone regeneration ossos - enxerto

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