15 documents found, page 1 of 2
Effect of Two Microshear Test Devices on Bond Strength and Fracture Pattern in ...
Tedesco,Tamara Kerber; Garcia,Eugenio Jose; Soares,Fabio Zovico Maxnuck; Rocha,Rachel de Oliveira; Grande,Rosa Helena MirandaThis in vitro study evaluated the influence of two devices for application of shear load in microshear tests on bond strength and fracture pattern of primary enamel and dentin. Eighty primary molars were selected and flat enamel (40 teeth sectioned mesio-distally) and dentin (40 teeth sectioned transversally) surfaces were obtained. Both surfaces were polished to standardize the smear layer. Two-step etch-and-r...
Effect of the application time of phosphoric acid and self-etch adhesive system...
Mena-Serrano,Alexandra Patricia; Garcia,Eugenio Jose; Perez,Miguel Munoz; Martins,Gislaine Cristine; Grande,Rosa Helena MirandaObjective: To evaluate the effect of application time on the resin-dentin bond strength (µTBS) and etching pattern of adhesive systems applied on sclerotic dentine. Material and Methods: A total of forty-two bovine incisors had their roots removed. The 1-step self-etch GO (SDI), the 2-step self-etch Adper SE Bond (3MESPE) and the 35% phosphoric acid (3MESPE) from the 2-step etch-and-rinse Adper Single Bond 2 (3...
Influence of alloy microstructure on the microshear bond strength of basic allo...
Bauer,José; Costa,José Ferreira; Carvalho,Ceci Nunes; Souza,Douglas Nesadal de; Loguercio,Alessandro Dourado; Grande,Rosa Helena MirandaThe aim of this study was to evaluate the influence of microstructure and composition of basic alloys on their microshear bond strength (µSBS) to resin luting cement. The alloys used were: Supreme Cast-V (SC), Tilite Star (TS), Wiron 99 (W9), VeraBond II (VBII), VeraBond (VB), Remanium (RM) and IPS d.SIGN 30 (IPS). Five wax patterns (13mm in diameter and 4mm height) were invested, and cast in a centrifugal cast...
Antioxidant activity by DPPH assay of potential solutions to be applied on blea...
Garcia,Eugenio José; Oldoni,Tatiane Luiza Cadorin; Alencar,Severino Matias de; Reis,Alessandra; Loguercio,Alessandro D.; Grande,Rosa Helena MirandaThe aim of this study was to assess, using the DPPH assay, the antioxidant activity of several substances that could be proposed to immediately revert the problems caused by bleaching procedures. The percentage of antioxidant activity (AA%) of 10% ascorbic acid solution (AAcidS), 10% ascorbic acid gel (AAcidG), 10% sodium ascorbate solution (SodAsS), 10% sodium ascorbate gel (SodAsG), 10% sodium bicarbonate (Bi...
Does the casting mode influence microstructure, fracture and properties of diff...
Bauer,José Roberto de Oliveira; Grande,Rosa Helena Miranda; Rodrigues-Filho,Leonardo Eloy; Pinto,Marcelo Mendes; Loguercio,Alessandro DouradoThe aim of the present study was to evaluate the tensile strength, elongation, microhardness, microstructure and fracture pattern of various metal ceramic alloys cast under different casting conditions. Two Ni-Cr alloys, Co-Cr and Pd-Ag were used. The casting conditions were as follows: electromagnetic induction under argon atmosphere, vacuum, using blowtorch without atmosphere control. For each condition, 16 s...
Characterization of aqueous silver nitrate solutions for leakage tests
Costa,José Ferreira; Siqueira,Walter Luiz; Loguercio,Alessandro Dourado; Reis,Alessandra; Oliveira,Elizabeth de; Alves,Cláudia Maria CoelhoOBJECTIVE: To determine the pH over a period of 168 h and the ionic silver content in various concentrations and post-preparation times of aqueous silver nitrate solutions. Also, the possible effects of these factors on microleakage test in adhesive/resin restorations in primary and permanent teeth were evaluated. MATERIAL AND METHODS: A digital pHmeter was used for measuring the pH of the solutions prepared wi...
Evaluating resin-enamel bonds by microshear and microtensile bond strength test...
Andrade,Andrea Mello de; Moura,Sandra Kiss; Reis,Alessandra; Loguercio,Alessandro Dourado; Garcia,Eugenio Jose; Grande,Rosa Helena MirandaOBJECTIVES: The aims of this study were to evaluate the effect of resin composite (Filtek Z250 and Filtek Flow Z350) and adhesive system [(Solobond Plus, Futurabond NR (VOCO) and Adper Single Bond (3M ESPE)] on the microtensile (μTBS) and microshear bond strength (μSBS) tests on enamel, and to correlate the bond strength means between them. MATERIAL AND METHODS: Thirty-six extracted human molars were sectioned ...
Effectiveness of sealing active proximal caries lesions with an adhesive system...
Abuchaim,Clarisse; Rotta,Marina; Grande,Rosa Helena Miranda; Loguercio,Alessandro Dourado; Reis,AlessandraThe objective of this study was to evaluate the effectiveness of a therapeutic sealant to arrest non-cavitated proximal carious lesion progression. The study population comprised 44 adolescents who had bitewing radiographs taken for caries diagnosis. Non-cavitated lesions extending up to half of dentin thickness were included in the sample. In the experimental group (n = 33), the proximal caries-lesion surfaces...
Bond strength and morphology of enamel using self-etching adhesive systems with...
Moura,Sandra Kiss; Reis,Alessandra; Pelizzaro,Arlete; Dal-Bianco,Karen; Loguercio,Alessandro Dourado; Arana-Chavez,Victor EliasOBJECTIVES: To assess the bond strength and the morphology of enamel after application of self-etching adhesive systems with different acidities. The tested hypothesis was that the performance of the self-etching adhesive systems does not vary for the studied parameters. MATERIAL AND METHODS: Composite resin (Filtek Z250) buildups were bonded to untreated (prophylaxis) and treated (bur-cut or SiC-paper) enamel ...
Long-term bond strength of adhesive systems applied to etched and deproteinized...
Uceda-Gómez,Ninoshka; Loguercio,Alessandro Dourado; Moura,Sandra Kiss; Grande,Rosa Helena Miranda; Oda,Margareth; Reis,AlessandraThe aim of this study was to evaluate the early and 12-month bond strength of two adhesive systems (Single Bond-SB and One Step-OS) applied to demineralized dentin (WH) and demineralized/NaOCl-treated dentin (H). Twenty flat dentin surfaces were exposed, etched, rinsed and slightly dried. For the H groups, a solution of 10% NaOCl was applied for 60 s, rinsed (15 s) and slightly dried. The adhesives were applied...