Purpose: The aim of this study was evaluate the effect of HBO on diabetic rats. Materials and Methods: Twenty rats were distributed into four groups (n = 5): Control (C); Control + HBO (CH); Diabetes (D) and Diabetes + HBO (DH). Diabetes was induced by streptozotocin, and bone defects were created in both femurs in all animals. HBO therapy began immediately after surgery and was performed daily in the CH and DH groups. After 7 days, the animals were euthanized. The femurs were removed, demineralized, embedded in paraffin, and histologic images were analyzed. Results: Qualitative histologic analyses showed more advanced stage bone regeneration in control groups (C and CH) compared with diabetic groups (D and DH). Histomorphometric analysis showed significantly increased bone neoformation in CH compared with the other groups (p < 0.001). Diabetic Group (D) showed decreased bone neoformation compared with non-diabetic groups (C and CH) (p < 0.001); however DH did not differ from C Group (p > 0.05). The mast cell population increased in CH compared with the other groups (C, D, and DH) (p < 0.05). The mast cell population did not differ between D and DH Groups. Conclusions: This study showed that HBO therapy improved early bone regeneration in diabetic rats and increased the mast cell population only in non-diabetic animals. HBO was shown to be important treatment for minimizing deleterious effects of diabetes on bone regeneration.

An ideal aesthetic standard consists of facial and smile harmony. Discolored teeth generally cause an imbalance in facial aesthetics, leading to low self-esteem and disturbance in social relationships. Causes of teeth discoloration are classified as intrinsic or extrinsic. Bleaching is considered a safe and effective treatment for discolored nonvital teeth and can be associated with restorative treatment to properly correct the dental color and maximize the aesthetic results. This paper aims to present two case reports of single discolored nonvital anterior teeth and the protocol used to reestablish the dental harmony of these patients by bleaching and direct composite resin restoration. To exert minimally invasive dentistry is very important to preserve tooth structure and reduce the risk of fracture. Internal bleaching, although may not be sufficient to reestablish the aesthetic in some cases, it is important to minimize dental preparation to perform an indirect or direct restoration. Dentists must take into account the patients expectations, dominate the restorative technique and know the dental materials to properly be able to restore function and aesthetics and consequently improve life quality and social relationships.

A hipersensibilidade dentinária cervical (HDC) é caracterizada por uma resposta exacerbada aos estímulos sensoriais térmicos, químicos, osmóticos e táteis em regiões de dentina exposta, causando dor aguda e desconforto ao paciente. Dentre as diversas opções de tratamento para a HDC, destacam-se os agentes dessensibilizantes de ação neural e obliteradora. O objetivo dessa revisão de literatura foi abordar a efetividade de diversos tipos de tratamentos para controle da hipersensibilidade dentinária localizada na região cervical do dente, comparando entre os estudos avaliados quais terapias são mais eficazes e apresentam maior longevidade. Foi realizada uma pesquisa sobre o tema proposto na base de dados PubMed, utilizando o descritor em inglês cervical dentin hypersensitivity e fizeram parte dos critérios de inclusão do trabalho artigos publicados entre 2013 e 2018. De acordo com os estudos incluídos nessa revisão, em relação a efetividade, tiveram destaque os tratamentos realizados por meio da aplicação de vernizes e do laser de baixa potência, porém esses agentes foram avaliados em um espaço de tempo limitado na maioria dos estudos. Nota-se a necessidade de realizar novas pesquisas clínicas com maiores períodos de acompanhamento para consolidar e/ou afirmar a efetividade e longevidade dos diversos agentes dessensibilizantes disponíveis no mercado.