42 documents found, page 1 of 5
Association of solvents improves selected properties of experimental dental adh...
Silvestre,Francisbênia Alves; Araújo Neto,Vitaliano Gomes de; Giannini,Marcelo; Rifane,Tainah Oliveira; Cordeiro,Karen Evellin MouraAbstract: The aim of the study was to evaluate how the association of solvents (tetrahydrofuran [THF], dimethyl sulfoxide [DMSO], ethanol [ET] or acetone [ACT]) with experimental dental adhesives affects selected properties of experimental dental adhesives and dentin bond durability. Six adhesive combinations were prepared containing: 30 % ET, 30 % ACT, 30 % THF, 28 % ET + 2 % DMSO (ET+DMSO), 15 % ethanol + 15 ...
Microhardness homogeneity of RBCs light-cured with a multiple-peak LED and surf...
Sahadi,Beatriz Ometto; Nima,Gabriel; Andre,Carolina Bosso; Sebold,Maicon; Palma-Dibb,Regina Guenka; Faraoni,Juliana Jendiroba; Giannini,MarceloAbstract This in vitro study evaluated the effect of the beam homogeneity of a multiple-peak light-curing unit on the surface microhardness and the effect of toothbrushing wear on the microhardness, surface roughness, roughness profile, volume loss, and gloss retention of incremental and bulk-fill resin-based composites (RBCs). A LED light-curing unit (VALO) with four LEDs at the tip end (405, 445, 465A, and 46...
Synthesis, characterization, and incorporation of upconverting nanoparticles in...
Pacheco,Rafael Rocha; Garcia-Flores,Ali Francisco; Soto-Montero,Jorge Rodrigo; Lesseux,Guilherme Gorgen; Lancelotti,Ailla Carla Rocha AcostaAbstract: The purpose of this study was to describe the synthesis, characterization, and functionalization of b-NaYF4:30%Yb/0.5%Tm upconverting nanocrystals for use as nanofillers in a dental adhesive and microscopically evaluate the interface between the particles and a commercial adhesive. The upconverting nanoparticles were synthesized and purified by thermal decomposition, and their chemical composition det...
Decomposition Rate, pH, and Enamel Color Alteration of At-Home and In-Office Bl...
Cavalli,Vanessa; Silva,Bruna Guerra da; Berger,Sandrine Bittencourt; Marson,Fabiano Carlos; Tabchoury,Cinthia Pereira Machado; Giannini,MarceloAbstract This study evaluated the decomposition rate (DR), pH, enamel color alteration (DE) and whiteness index (DWI) promoted by at-home and in-office bleaching. Enamel surface was submitted to (n=10): at-home (10%, 15%, 20% carbamide peroxide - CP, 6% hydrogen peroxide -HP) and three 35% HP agents with light irradiation (LED, laser, and halogen) or no treatment (control). The DR and pH of agents were measured...
Accuracy of Irradiance and Power of Light-Curing Units Measured With Handheld o...
Giannini,Marcelo; André,Carolina Bosso; Gobbo,Vanessa Cavalli; Rueggeberg,Frederick AllenAbstract This study measured and compared exitance irradiance and power of 4 commercial dental light-curing units (LCU) (Elipar S10, Elipar DeepCure-S, Corded VALO and Bluephase Style) using different types of radiometers. The devices used to analyze the LCU were classified as either handheld analog (Henry Schein, Spring, Demetron 100A, Demetron 100B and Demetron 200), handheld digital (Bluephase 1, Bluephase I...
Irradiance and Radiant Exposures Delivered by LED Light-Curing Units Used by a ...
Soares,Carlos José; Bragança,Gabriel Felipe de; Pereira,Renata Afonso da Silva; Rodrigues,Monise de Paula; Braga,Stella Sueli LourençoAbstract The combination of the restoration location, the hand preference of the operator using the light-curing unit (LCU), and the design of the LCU all can have an impact on the amount of the light delivered to the restoration. To evaluate the effect of left-handed or right-handed users, the position of the operator (dentist or assistant), and the LCU design on the irradiance, radiant exposure and emission s...
Multiple-peak and single-peak dental curing lights comparison on the wear resis...
Sahadi,Beatriz Ometto; Price,Richard Bengt; André,Carolina Bosso; Sebold,Maicon; Bermejo,Gabriel Nima; Palma-Dibb,Regina GuenkaAbstract: The effects of tooth brushing could affect the long-term esthetic outcome of composite restorations. This study evaluated the effect of two different emission spectrum light-curing units on the surface roughness, roughness profile, topography and microhardness of bulk-fill composites after in vitro toothbrushing. Valo (multiple-peak) and Demi Ultra (single-peak) curing lights were each used for 10s to...
Evaluation of Eye Protection Filters Used with Broad-Spectrum and Conventional ...
Soares,Carlos José; Rodrigues,Monise de Paula; Vilela,Andomar Bruno Fernandes; Rizo,Erick René Cerda; Ferreira,Lorraine Braga; Giannini,MarceloAbstract The high irradiance and the different emission spectra from contemporary light curing units (LCU) may cause ocular damage. This study evaluated the ability of 15 eye protection filters: 2 glasses, 1 paddle design, and 12 dedicated filters to block out harmful light from a monowave (HP-3M ESPE) and a broad-spectrum (Valo, Ultradent) LED LCU. Using the anterior sensor in the MARC-Patient Simulator (BlueL...
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...
An Evaluation of the Light Output from 22 Contemporary Light Curing Units
Soares,Carlos José; Rodrigues,Monise de Paula; Oliveira,Laís Rani Sales; Braga,Stella Sueli Lourenço; Barcelos,Luciana Mendes; Silva,Gisele Rodrigues daAbstract This study measured the radiant power (mW), irradiance (mW/cm2) and emission spectra (mW/cm2/nm) of 22 new, or almost new, light curing units (LCUs): - Alt Lux II, BioLux Standard, Bluephase G2, Curing Light XL 3000, Demetron LC, DX Turbo LED 1200, EC450, EC500, Emitter C, Emitter D, KON-LUX, LED 3M ESPE, Led Lux II, Optilight Color, Optilight Max, Optilux 501, Poly Wireless, Radii cal, Radii plus, TL-...