A randomised trial of the bone formation after maxillary sinus floor augmentation with bovine hydroxyapatite (Cerabone®) and Photobiomodulation: histomorphometric and immunohistochemical analysis.

Background: The use of non-autogenous biomaterial to increase bone height in the maxillary sinus has been shown to be effective, but the results are still inconclusive. Material and Methods: Eight participants were selected and included in the research. After surgical access with osteotomy on the lateral wall of both maxillary sinuses, these were filled with Cerabone®. Then, by blind randomization, they received one of the following treatments: Filling with Cerabone® (Control group); treatment with Photobiomodulation (PBM), filling with Cerabone® and treatment with low-power laser (PBM group). Biopsies were obtained 30 days after the surgery, using a 2.8 mm internal diameter trephine bur. Qualitative and quantitative histological analyzes were performed and immunohistochemical analyzes of osteocalcin (OCN) and tartrate-resistant acid phosphatase (TRAP) were performed with scores for each of the biological events. Results: The Cerabone® biomaterial demonstrated a high degree of biocompatibility. New bone formation was observed in both groups. In the PBM group, there was greater bone formation and newly formed tissue in an advanced state of bone maturation. The immunostaining of OCN was greater at 30 days in the PBM group than in the control. There was no significant difference in TRAP immunostaining at 30 days between the groups. Conclusions: Low-power laser-mediated by PBM promoted greater bone formation; the newly formed tissue showed a more advanced state of bone maturation in maxillary sinuses filled with Cerabone® biomaterial and treatment with PBM, within the 30-day evaluation period. Key words:Sinus floor augmentation, dental implants, bone and bones, low-level light therapy.

Enxertos ósseos autógenos de áreas doadoras intra-bucais e procedimentos clínicos integrados possibilitando reabilitação estética e funcional / Intraoral autogenous bone graft and interdisciplinary procedures achieving esthetic and functional rehabilitation

A perda dentária resulta em reabsorção do osso alveolar o que em muitos casos limita o tratamento reabilitador com implantes dentários. Nessas situações torna-se necessário o uso de enxerto ósseo para permitir a instalação de implantes na posição ideal. Vários são os tipos de enxertos disponíveis, contudo enxertos ósseos autógenos são considerados "padrão ouro", e podem ter como áreas doadoras sítios intra e extrabucais. O objetivo deste trabalho é apresentar um caso clínico no qual foi utilizado enxerto ósseo autógeno intrabucal para instalação de implantes dentários, discutindo-se indicações e vantagens da técnica.