53 documents found, page 1 of 6
Dimensional change of impression materials for dental prothesis using different...
Oliveira,Adriano Relvas Barreira de; Sinhoreti,Mário Alexandre Coelho; Amaral,Marina; Concílio,Laís Regiane da Silva; Vitti,Rafael PinoABSTRACT The aim of this study was to verify the effectiveness of alternative techniques for measuring the linear dimensional change of molds obtained by different impression materials. A stainless-steel die containing three lines was used to get the impressions. The impression materials were handled according to the manufacturers' instructions. After gelation/polymerization time, the molds (n=12) were stored f...
Do dual-cure bulk-fill resin composites reduce gaps and improve depth of cure
Fraga,May Anny Alves; Correr-Sobrinho,Lourenço; Sinhoreti,Mário Alexandre Coelho; Carletti,Talita Malini; Correr,Américo BortolazzoAbstract This in vitro study aimed to evaluate the gaps length and depth of cure of dual-cure bulk-fill resin composites inserted in box-shaped preparations. Box-shaped preparations (4 mm deep) were made in fifteen human third-molars and divided into three groups according to the resin composites (n=5): Dual-cure bulk-fill BulkEZ (BEZ); Dual-cure bulk-fill HyperFIL (HF); and Tetric Evoceram Bulk-fill (TETRIC), ...
Light-Curing Units, Photoinitiators System, and Monomers on Physico-Mechanical ...
Prezotto,Gustavo Furlan da Silva; Lima,Weverteon Soares de; Vitti,Rafael Pino; Silva,Ariel Farias da; Sinhoreti,Mário Alexandre CoelhoABSTRACT This study evaluated the physico-mechanical properties of experimental composite resins made with different resin matrix and light-curing units. Experimental composite groups were divided according to monomers (BisGMA + TEGDMA-BT and BisGMA + BisEMA + UDMA + TEGDMA-BBUT) and photoinitiator system (camphorquinone-CQ and 1-phenyl-1,2-propanedione-PPD). A quartz tungsten halogen (QTH) or light-emitting di...
Solvent Degradation and Polymerization Shrinkage Reduction of Resin Composites ...
Favarão,Jamille; Oliveira,Dayane Carvalho Ramos Salles de; Rocha,Mateus Garcia; Zanini,Maurício Matté; Abuna,Gabriel Flores; Mendonça,Marcio JoséAbstract The aim of this study was to use the isobornyl methacrylate (IBOMA) as a combining or substituent diluent monomer in the resin matrix of dental resin composites. Thus, the resin matrix was formulated with 60 wt% of BisGMA and 40 wt% of diluent monomers. TEGDMA as the only diluent monomer was used as control with 40 wt%, while total substitution of TEGDMA was done with 40 wt% of IBOMA. The combination o...
Influence of Pre-Heating Regular Resin Composites and Flowable Composites on Lu...
Tomaselli,Lucas de Oliveira; Oliveira,Dayane Carvalho Ramos Salles de; Favarão,Jamille; Silva,Ariel Farias daAbstract The aim of this study was to evaluate of pre-heating, filler contents and ceramic thickness on film thickness, microshear bond strength, degree of conversion and color change on ceramic veneers. Two experimental composites were prepared (Bis-GMA/UDMA/BisEMA/ TEGDMA), with different amounts of filler (65% or 50%wt) simulating a conventional and a flowable composite. The flowable (F) was used at room tem...
Pentaerythritol Tetrasalicylate in the Chemical Composition of Root Canal Sealers
Silva,Manuela Gonçalves de Souza e; Münchow,Eliseu Aldrighi; Vitti,Rafael Pino; Sinhoreti,Mário Alexandre Coelho; Piva,Evandro; Ogliari,Fabrício AuloAbstract The aim of this study was to synthesize and evaluate physicochemical properties of a new salicylate derivative in experimental calcium-based root canal sealers. Two salicylate derivatives were synthesized for the transesterification reaction of methyl salicylate with two different alcohols (1,3-butylenoglicol disalicylate-BD and pentaerythritol tetrasalicylate -PT) in molar ratio 1:3 and 1:6, respectiv...
Effect of Ceramic Interposition and Post-activation Times on Knoop Hardness of ...
Moreno,Marina Barrêto Pereira; Costa,Ana Rosa; Rueggeberg,Frederick Allen; Correr,Américo Bortolazzo; Sinhoreti,Mário Alexandre CoelhoAbstract The aim of this study was to evaluate Knoop hardness of different shades of a resin cement light-cured directly or through ceramic discs, measured 15 min or 24 h after light exposure, and at different depths. Specimens of a commercial resin cement (Variolink Veneer) in seven shades, were fabricated in an elastomeric mold, covered with a mylar strip, a 0.7 mm thick ceramic disc (IPS e.max Press) was pla...
Influence of Different Dentin Substrate (Caries-Affected, Caries-Infected, Soun...
Costa,Ana Rosa; Garcia-Godoy,Franklin; Correr-Sobrinho,Lourenço; Naves,Lucas Zago; Raposo,Luís Henrique Araújo; Carvalho,Fabíola Galbiatti deAbstract The aim of this study was to evaluate the μTBS in different dentin substrates and water-storage periods. Twenty-four dentin blocks obtained from sound third molars were randomly divided into 3 groups: Sound dentin (Sd), Caries-affected dentin (Ca) and Caries-infected dentin (Ci). Dentin blocks from Ca and Ci groups were subjected to artificial caries development (S. mutans biofilm). The softest carious...
Microtensile Bond Strength of Adhesive Systems in Different Dentin Regions on a...
Sinhoreti,Mário Alexandre Coelho; Soares,Eveline Freitas; Abuna,Gabriel Flores; Correr Sobrinho,Lourenço; Roulet,Jean-François; Geraldeli,SauloAbstract The aim of this study was to evaluate microtensile bond strength (µTBS) of self-etch and etch-and-rinse adhesives systems compared in different dentin regions (central-CD or proximal-PD) in a class II cavity configuration. A class II (mesial-oclusal-distal) cavity configuration was simulated on 20 extracted human third-molars (4 mm wide/3 mm deep). Etch-and-rinse adhesive (Scotchbond Multi Purpose, n=5...
Influence of Different Concentration and Ratio of a Photoinitiator System on th...
Grohmann,Caio Vinícius Signorelli; Soares,Eveline Freitas; Souza-Junior,Eduardo José Carvalho; Brandt,William Cunha; Puppin-Rontani,Regina MariaAbstract The aim in this study was to evaluate the influence of different ratio of camphorquinone/tertiary amine concentration on the flexural strength (FS), elastic modulus (EM), degree of conversion (DC), yellowing (YL), water sorption (WS) and water solubility (WSL) of experimental composites. Thus, acrylate blends were prepared with different camphorquinone (CQ) and amine (DABE) concentrations and ratios by...