Incorporação e remodelação de enxertos homólogos na reconstrução alveolar em humanos: análise tomográfica, histológica e histomorfométrica

• Autor(a) principal: Martins, Daniel Deluiz
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/14190
• topic: Bone graft; Fresh-frozen bone; Homologous transplantation; Allogeneic transplantation; Alveolar ridge augmentation; Enxerto ósseo; Osso homólogo ultracongelado; Transplante homólogo; Transplante alogênico; Aumento do rebordo alveolar; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA::PERIODONTIA

Fresh-frozen homologous bone grafts have been reported achieving good clinical results as a substitute for autogenous bone in alveolar reconstruction. However, data regarding the incorporation and remodeling of these grafts are not available in the literature. The aim of this study is to determine the optimal period for the implant placement in alveolar ridges reconstructed with bone block allografts. 24 patients underwent alveolar ridge reconstruction with homologous bone prior to implant placement. Subjects were randomly assigned into one of three groups according to the waiting time for the second surgical stage (4, 6 and 8 months). Tomographic, histological and histomorphometric analisys were used to determine the rates of grafts resorption and incorporation at different time intervals for each group. Data from graft resorption showed statistically significant differences for the three healing intervals. Similarly, histomorphometric parameters as: osteocytes count and quantification of remaining graft in the biopsies showed significant differences between groups. According to this work, with regard to the remodeling and incorporation, the most favorable the short term period to implant placement after fresh-frozen block allografts ridge reconstruction is 4 months.