34 documents found, page 1 of 4
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...
Effect of Metal Primers on Bond Strength of a Composite Resin to Nickel-Chrome ...
Nima,Gabriel; Ferreira,Paulo Vitor Campos; Paula,Andreia Bolzan de; Consani,Simonides; Giannini,MarceloAbstract This study evaluated the effects of three metal primers and one multi-mode adhesive system on the shear bond strength (SBS) of a flowable composite resin to nickel-chrome metal alloy (Ni-Cr). Ninety plates were cast from Ni-Cr and divided in nine groups (n=10). The surfaces were sandblasted with Al2O3 and primed with three adhesive primers: Alloy Primer (AP), Universal Primer (TP) and RelyX Ceramic Pri...
Microtensile Bond Strength and Microhardness of Composite Resin Restorations Us...
Grandi,Victor Hugo; Berger,Sandrine Bittencourt; Fugolin,Ana Paula Piovezan; Gonini-Júnior,Alcides; Lopes,Murilo Baena; Consani,SimonidesAbstract The aim of this study was to evaluate the efficacy of applying sonic energy on microtensile bond strength and microhardness after the restoration process. A total of 40 human third molars were extracted. Class II cavities were prepared and restored with composite SonicFill or Filtek Z350 XT with and without the application of sonic energy. After the teeth were stored in water for 24 h, the teeth were s...
Influence of Water Storage and Bonding Material on Bond Strength of Metallic Br...
Costa,Ana Rosa; Correr,Américo Bortolazzo; Consani,Simonides; Giorgi,Maria Cecília Caldas; Vedovello,Silvia Amélia; Vedovello Filho,MárioAbstract: This study investigated the influence of water storage (24 h and 6 months), and Transbond XT and Fuji Ortho LC bonding materials on the bond strength of metallic brackets bonded to feldspathic ceramic. Four cylinders of feldspathic ceramic were etched with 10% hydrofluoric acid for 60 s. Each cylinder received two layers of silane. Metallic brackets were bonded to the cylinders using Transbond XT or F...
Comparison of Silorane and Methacrylate-Based Composites on the Polymerization ...
Guiraldo,Ricardo Danil; Consani,Simonides; Consani,Rafael Leonardo Xediek; Berger,Sandrine Bittencourt; Correr,Americo BortolazzoThis study evaluated the temperature variation in the pulp chamber during photoactivation of two restorative composite resins (Filtek P90 silorane-based composite and Heliomolar methacrylate-based composite) with either a quartz-tungsten-halogen (QTH) or light-emitting diodes (LED) light-curing unit (LCU) and using dentin thicknesses (0.5 and 1.0 mm). Standardized cavities (2x2x2 mm) were prepared in 80 bovine ...
Evaluation of the coefficient of thermal expansion of human and bovine dentin b...
Lopes,Murilo Baena; Yan,Zhuoqun; Consani,Simonides; Gonini Júnior,Alcides; Aleixo,Anderson; McCabe,John F.The mismatch of thermal expansion and contraction between restorative materials and tooth may cause stresses at their interface, which may lead to microleakage. The present work compared the coefficient of thermal expansion (CTE) with the thermomechanical behavior of human and bovine teeth and determined if the CTE is a suitable parameter to describe tooth behavior. Fifteen human third molar and 15 bovine incis...
An alternative method for thermal cycling test: effect on the marginal microlea...
Consani,Simonides; Sinhoreti,Mário Alexandre Coelho; Correr-Sobrinho,Lourenço; Leite,Rodrigo Suiett Braga; Bortoletto,Karen JulianaThis study evaluated an alternative method for thermal cycling test on the microleakage and bond strength of the polymer-dentin bond. For the microleakage test the cavities were restored with a TEGDMA+UDMA+bis-EMA composite polymer light cured for 20 s. Samples were immersed in 2% methylene blue solution for 2 h and sectioned. Microleakage scores were submitted to Kruskal-Wallis test. For the shear bond strengt...
Linear dimensional change, compressive strength and detail reproduction in type...
Silva,Marcos Aurélio Bomfim da; Vitti,Rafael Pino; Consani,Simonides; Sinhoreti,Mário Alexandre Coelho; Mesquita,Marcelo FerrazThe type IV dental stone is widely used for the fabrication of dyes and master casts for fixed and removable partial prostheses. It is typically normal to wait at least 24 hours for the casts to dry prior to beginning the laboratory procedures. The waiting time has been shown to be greatly reduced by using microwave drying. OBJECTIVE: This study evaluated the influence of drying techniques at room temperature a...
Photoelastic evaluation of the effect of composite formulation on polymerizatio...
Oliveira,Karla Mychellyne Costa; Consani,Simonides; Gonçalves,Luciano Souza; Brandt,William Cunha; Ccahuana-Vásquez,Renzo AlbertoWe compared polymerization stress in two commercial composites and three experimental composites made using camphorquinone (CQ) and/or phenylpropanedione (PPD) as photoinitiators. The internal surfaces of photoelastic resin discs with cylindrical cavities were roughened and treated with adhesive. Composites were divided into five groups: two commercial composites (Filtek Silorane and Filtek Z250) and three expe...
Effect of monomer content in the monomer-polymer ratio on complete denture teet...
Lopes,Michelle Cristina; Consani,Rafael Leonardo Xediek; Mesquita,Marcelo Ferraz; Sinhoreti,Mário Alexandre Coelho; Consani,SimonidesThe purpose of the study was to verify the linear displacement of teeth in maxillary complete dentures influenced by different monomer-polymer ratios - according to the manufacturer's instructions, with 25% excess or 25% less monomer content - in the conventional and microwaved polymerization techniques. Wax base plates and wax planes were made on edentulous maxillary stone casts according to traditional method...