Gel de doxiciclina a 10% como inibidor da osteoclastogênese na regeneração óssea, associado ou não ao bio-oss - estudo histomorfométrico e tomográfico em ratos.

• Ano de defesa: 2015
• Autor(a) principal: Silva, Amanda De Carvalho
• Orientador(a): Mariano, Ronaldo Célio
• Banca de defesa: Haddad, Marcela Filié, Faverani, Leonardo Perez
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Alfenas
• Programa de Pós-Graduação: Programa de Pós-Graduação em Ciências Odontológicas
• Departamento: Faculdade de Odontologia
• País: Brasil
• Palavras-chave em Português: Doxiciclina; Regeneração Óssea; Materiais Biocompatíveis
• Área do conhecimento CNPq: ODONTOLOGIA::CIRURGIA BUCO-MAXILO-FACIAL
• Link de acesso: https://repositorio.unifal-mg.edu.br/handle/123456789/844

The large number of reconstructive bone surgeries drives the development of new biomaterials. In this context, doxycycline, a structural isomer of tetracycline, has been researched for several decades, and its local application in dentistry is directed to the treatment of periodontitis and peri-implantitis. However, recent studies have shown that it has the feature of inhibiting osteoclastogenesis, in addition to those well-known features such as antibacterial, anti-inflammatory, anti-collagenase and immunosuppressive. Therefore, the aim of this study was to evaluate the local application of doxycycline in the form of gel based on the natrosol, in bone regeneration, with or without the particulate bovine bone (Bio-Oss), through a quantitative and qualitative study critical defects in rat calvaria. Therefore, 40 rats were randomly divided into 5 groups with 8 animals each, according to the treatment received: CS (blood clot); NAT (natrosol); DOX (10% doxycycline gel); BO (Bio-Oss); BODOX (Bio-Oss associated with doxycycline). Four animals from each group were euthanized at 4 and 8 weeks postoperatively. In tomographic analysis (CBCT), mean density in the region of the defect was calculated as a percentage relative to the native bone density. While in histomorphometric analysis, the newly formed bone area (NFBA) was calculated as a percentage of the total area (TA). The valuesobtained underwent analysis of variance (ANOVA) and Tukey's test (p<0.05) when ANOVA suggested statistical difference. The results showed the mean percentage of tomographic density in the region of the defect at the end of 8 weeks was higher for BO (47.8183%) when compared to DOX (41.3580%), NAT (31.3870% ) and CS (31.0045%) and similar to BODOX (46.5909%). Regarding new bone formation, the DOX group (38.7875%) had the highest mean bone formation, although statistically similar to BODOX groups (33.1345%), BO (23.8915%) and NAT (22.5271 %) and statistically higher than CS (14.1250%). Within the limits of this study, it is observed that the gel doxycycline 10% had a good effect in filling bone defects in rat calvaria, and its association with particles of bovine bone (Bio-Oss) showed better behavior as a framework for bone regeneration.