RESUMO
A osteoporose é caracterizada pela perda óssea e pelo comprometimento da resistência do osso. Essa patologia afeta, também, os ossos da face e consequentemente interfere na atuação dos profissionais da odontologia. Assim sendo, o presente trabalho revisou a literatura acerca da relação entre osteoporose e odontologia. O levantamento dos dados se deu por consulta a livros e nas bases de dados Biblioteca Virtual em Saúde (BVS), PubMed e Scientific Eletronic Library Online (SciELO) e como Descritores em Ciência da Saúde (Decs) foram adotados os termos: "Odontologia", "Osteoporose" e "Saúde bucal". A osteoporose diminui a massa e aumenta a porosidade óssea na maxila e na mandíbula, podendo provocar até quatro vezes mais perda dentária. Os bifosfonatos, principal classe medicamentosa utilizada para o tratamento de osteoporose, estão associados à ocorrência de osteonecrose dos maxilares e ao aumento de tempo de tratamento ortodôntico. Assim, pode-se concluir que é imprescindível o conhecimento do cirurgião-dentista acerca da osteoporose para uma segura abordagem e execução de tratamento.
Osteoporosis is characterized by bone loss and compromised bone strength. This pathology also affects the bones of the face and consequently interferes with the work of dentists. Therefore, the present study reviewed the literature about the relationship between osteoporosis and dentistry. Data collection was carried out by consulting books and the databases Biblioteca Virtual em Saúde (BVS), PubMed and Scientific Electronic Library Online (SciELO) and as Medical Subjects Headings (MeSH) the terms adopted were: "Dentistry", "Osteoporosis" and "Oral health". Osteoporosis reduces bone mass and increases bone porosity in the maxilla and jaw, which can cause up to four times more tooth loss. Bisphosphonates, the main class of medications used to treat osteoporosis, are associated with the occurrence of osteonecrosis of the jaw (ONJ) and increase the time of orthodontic treatment. Thus, it can be concluded that the dentist's knowledge of osteoporosis is necessary for a safe approach and execution of treatment.
RESUMO
Proteins with osteoinductive potential, especially recombinant human bone morphogenetic protein (rhBMP)-2, have large effects on cell growth and their differentiation. The aim of this study was to assess repair of bone defects in rat calvaria with different types of grafts associated with rhBMP-2, through immunohistochemistry and micro computed tomography (CT) analyses. A total of 35 male Wistar rats were selected, each weighing ~250 g, with a waiting period of 6 weeks from the creation of the defect to the sacrifice, and divided into five groups (n = 7): autograft plus 5 µg rhBMP-2 (AuG/BMP-2); allograft plus 5 µg rhBMP-2 (AlG/BMP-2); xenograft (heterologous) plus 5 µg rhBMP-2 (XeG/BMP-2); 5 µg rhBMP-2 (BMP-2) and the control group (n = 7). The micro CT reveal that all groups associating different bone grafts with BMP-2 showed increased bone formation compared to the control. The immunostaining show that osteocalcin and bone sialoprotein were higher in groups with BMP-2 than control group; BMP was high expressed in AuG/BMP-2, AlG/BMP-2, and BMP-2; vascular endothelial growth factor (VEGF) was more expressed in groups with BMP-2; VEGF-R2 was low to moderate in AuG/BMP-2, XeG/BMP-2, and BMP-2, predominantly moderate in AlG/BMP-2 and low in the control; CD-31 was predominantly moderate in AuG/BMP-2, AlG/BMP-2, and XeG/BMP-2, low to moderate in BMP-2 and low in the control. The results revealed that rhBMP-2 improved bone repair when administered alone, or when associated with different bone grafts.