Análise clínica e microscópica de rebordos maxilares reconstruídos com enxertos ósseos onlay homólogos e autógenos e reabilitados com implantes osseointegráveis

• Autor(a) principal: Sydney, Roberto Bittencourt
• Data de Publicação: 2010
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da USC
• Texto Completo: http://localhost:8080/tede/handle/tede/115
• topic: REPARAÇÃO ÓSSEA; ENXERTO HOMÓLOGO; IMPLANTES DENTÁRIOS; BONE GRAFTS; ALLOGRAFTS; DENTAL IMPLANTS; CIENCIAS DA SAUDE::ODONTOLOGIA

The purpose of this study was to evaluate, clinically and microscopically, onlay bone allografts and autografts in maxillary reconstructions for the installation of dental implants. Sixteen partially edentulous patients were divided into two groups: Group A, composed by patients treated with autogenous bone graft from the mandibular ramus; Group H, patients treated with allograft bone from the tibia. After six to nine months, specimens were retrieved with trephine burs and implants were positioned. Six months later, during the second stage surgery, final abutments were screwed and provisional restorations were built. A total of 22 bone grafts were performed in 16 patients (17 allografts and 5 autogenous grafts). For Group A, graft survival rate was 100%; for Group H, 82.3%. Implant survival rate was 100% for group A and 94,75 for group H. Microscopically, in Group A, remodeling was observed, with the presence of osteocytes in their lacunae. In Group H, non-viable tissue was identified, irrespective of the time the specimens were retrieved. Block allografts can be successfully used for alveolar ridge augmentation in maxillary defects. Nevertheless, sufficient native bone is imperative to achieve osseointegration, once allografts did not present microscopic characteristics compatible with this purpose.