Estudo epidemiológico de Staphylococcus spp em ambientes, água e portadores sadios e determinação da sensibilidade a antimicrobianos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliações histológica e histomorfométrica do reparo de cavidades ósseas preenchidas por osso bovino anorgânico ou vidro bioativo associados ao plasma rico em plaquetas em mandíbula de cão

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Infiltração marginal em restaurações de resina composta após tratamento dentinário com abrasão a ar e sistemas adesivos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito do laser de baixa intensidade sobre células odontoblastóides in vitro e complexo dentino-pulpar in vivo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação histomorfológica da resposta da polpa de dentes de cães submetida ao capeamento com sistema adesivo, cimento de hidróxido de cálcio e dois tipos de agregado de trióxido mineral

Pós-graduação em Odontologia - FOA

Resposta de polpas capeadas com proteínas bioativas ou hidróxido de cálcio submetidas ou não, à ação do laser

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência da técnica de preparo cavitário na microinfiltração marginal em restaurações de dentes decíduos

Pós-graduação em Odontologia - FOAR

Avaliação do plasma rico em plaquetas no tratamento de defeitos ósseos e lesões periodontais de furca grau II. Estudos histológico e histomorfométrico em cães

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Utilização de enxerto ósseo autógeno, biovidros e cimento de fosfato de cálcio em defeitos ósseos criados cirurgicamente em mandíbulas de macacos Cebus apella. Estudo histológico

Pós-graduação em Odontologia - FOAR

Efetividade de vernizes fotopolimerizáveis experimentais na redução da hidrofobicidade e adesão de Candida albicans em uma resina para base de prótese

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Influência da luz e temperatura em cavidades e canais secretores em plântulas de Copaifera langsdorffii Desf. (Leguminosae-Caesalpinioideae): estudo anatômico e ultraestrutural

Pós-graduação em Ciências Biológicas (Botânica) - IBB

Espectros de raios-x em MEV indicam associação entre Al e Si em plantas acumuladoras de Al do Cerrado

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Uma contribuição ao estudo das tensões residuais no fresamento

Pós-graduação em Engenharia Mecânica - FEIS

Evaluation of bond strength and thickness of adhesive layer according to the techniques of applying adhesives in composite resin restorations

Adhesive restorations have increasingly been used in dentistry, and the adhesive system application technique may determine the success of the restorative procedure. The aim of this study was to evaluate the influence of the application technique of two adhesive systems (Clearfil SE Bond and Adper Scotchbond MultiPurpose) on the bond strength and adhesive layer of composite resin restorations. Eight human third molars were selected and prepared with Class I occlusal cavities. The teeth were restored with composite using various application techniques for both adhesives, according to the following groups (n = 10): group 1 (control), systems were applied and adhesive was immediately light activated for 20 seconds without removing excesses; group 2, excess adhesive was removed with a gentle jet of air for 5 seconds; group 3, excess was removed with a dry microbrush-type device; and group 4, a gentle jet of air was applied after the microbrush and then light activation was performed. After this, the teeth were submitted to microtensile testing. For the two systems tested, no statistical differences were observed between groups 1 and 2. Groups 3 and 4 presented higher bond strength values compared with the other studied groups, allowing the conclusion that excess adhesive removal with a dry micro-brush could improve bond strength in composite restorations. Predominance of adhesive fracture and thicker adhesive layer were observed via scanning electron microscopy (SEM) in groups 1 and 2. For groups 3 and 4, a mixed failure pattern and thinner adhesive layer were verified. Clinicians should be aware that excess adhesive may negatively affect bond strength, whereas a thin, uniform adhesive layer appears to be favorable. (Quintessence Int 2013;44:9-15)

SEM Evaluation of the Interface Between Filling and Root- End Filling Materials

The aim of this ex vivo study was to evaluate, by scanning electron microscopy (SEM), the presence of gaps at the interface between filling material and three root-end filling materials. Thirty human upper molars disto-buccal roots were instrumented and filled with gutta-percha and eugenol-based sealer. The apicoectomy was performed 2mm from the apex and retrograde cavities were prepared with ultrasonic points (3mm in deep). The samples were divided into three experimental groups (n=10): Group Iwhite mineral trioxide aggregate (MTA); Group IISuper EBA; and Group IIIPortland cement. The root-end filling materials were inserted into the retocavities using a MTA carrier. After 48h, the roots were transversally sectioned in order to obtain the apical 5mm. Next, each specimen was prepared longitudinally with crescent granulation of abrasives water-wet sandpapers in order to expose the filling and root-end filling materials. Then, the specimens were subjected to slow dehydration with silica gel, mounted onto specific stubs and coated with paladium coverage for SEM analysis of the interface between filling and root-end filling materials. The percentage of gaps at the interfacial area was calculated by using Image Tool 3.0 software. Super EBA presented the higher percentage of gaps (1.5 +/- 0.67%), whereas MTA presented the lowest values (0.33 +/- 0.20%; p=0.0004). Despite the statistical differences observed between Super EBA and MTA, all the root-end filling materials presented great adaptation to the filling material, presenting small amount of gaps. SCANNING 36:252-257, 2014. (c) 2013 Wiley Periodicals, Inc.