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Assessment of influence of LED curing units used on microhardness of resin-modi...
Marques,Joyce Figueiredo de Lima; Ferraz,Laura Nobre; Lopes,Beatriz Kelly Barros; Vasconcelos,Tamires Aparecida Borges; Teixeira,Thiely RobertsAim Resin modified glass ionomer (RMGI) is class of material that can be used as sealant for preventing and arresting the progression of caries in pits and fissures. As these are hybrid materials, their properties can be affected by factors related to the polymerization process. Therefore, this study aimed to evaluate the influence of different generations of LED curing units (Elipar DeepCure-L and VALO Grand) ...
Characterization of low-cost Brazilian resin composites submitted to tooth brus...
Ferretti,Marcela Alvarez; Pereira,Renata; Lins,Rodrigo Barros Esteves; Soares,Mariana Gusmão Corsini; Pinto,Larissa Jacó HesselAbstract: This in vitro study aimed to evaluate surface microhardness, roughness, color, gloss and topography of low-cost Brazilian resin composites, compared with an international one. All 120 samples (8mm ø x 2mm height) were prepared and divided into 5 groups: Ultrafill (Biodinâmica), Llis (FGM), Fill Magic (Coltene), Applic (Makira), and Filtek Z250XT (3M Oral Care). Surface microhardness (KHN) (n=10) was a...
Influence of cigarette smoke combined with different toothpastes on enamel erosion
Ferraz,Laura Nobre; Pini,Núbia Inocêncya Pavesi; Ambrosano,Gláucia Maria Bovi; Aguiar,Flávio Henrique Baggio; Lima,Débora Alves Nunes LeiteAbstract: This in vitro study aimed to evaluate the effect of different toothpastes on dental enamel subjected to an erosive cycle with and without exposure to cigarette smoke. Bovine enamel specimens were randomly allocated into 12 groups (n = 12). For the in vitro simulation of smoking, half the groups underwent an exposure cycle of 20 cigarettes per day for 5 days. Subsequently, all groups were subjected to ...
Radiant exposure effects on physical properties of methacrylate - and silorane-...
Catelan,Anderson; Kawano,Yoshio; Santos,Paulo Henrique dos; Ambrosano,Gláucia Maria Bovi; Bedran-Russo,Ana Karina; Aguiar,Flávio Henrique BaggioAIM: To evaluate the effect of different radiant exposures on the degree of conversion (DC), Knoop hardness number (KHN), plasticization (P), water sorption (WS), and solubility (S) of different monomer resin-based composites. METHODS: Circular specimens (5 x 2 mm) were manufactured from methacrylate and silorane composite resins, and light-cured at 19.8, 27.8, 39.6, and 55.6 J/cm2, using second-generation LED ...
In situ assessment of the saliva effect on enamel morphology after microabrasio...
Pini,Núbia Inocencya Pavesi; Lima,Débora Alves Nunes Leite; Sundfeld,Renato Herman; Ambrosano,Gláucia Maria Bovi; Aguiar,Flávio Henrique BaggioAIM: This study evaluated saliva effects on enamel morphology surface after microabrasion technique. METHODS: Enamel blocks (16 mm2) obtained from bovine incisors were divided into 9 groups as follows: one control group (no treatment), four groups with microabrasion treatment using 35% phosphoric acid and pumice (H3PO4+Pum) and other four groups treated with 6.6% hydrochloric acid and silica (HCl+Sil). One grou...
Impact of light-curing time and aging on dentin bond strength of methacrylate- ...
Catelan,Anderson; Soares,Giulliana Panfiglio; Bedran-Russo,Ana Karina; Lima,Débora Alves Nunes Leite; Marchi,Giselle MariaAIM: To evaluate the impact of different light-curing times on dentin microtensile bond strength of two restorative systems after 24 h and 6 months of water storage. METHODS: Standardized Class II preparations were performed in 56 freshly-extracted human molars (n = 7), restored with methacrylate- or silorane-based restorative systems, and light-cured using a light-emitting diode at 1390 mW/cm2 by the recommend...
Effect of irradiation times on the polymerization depth of contemporary fissure...
Borges,Boniek Castillo Dutra; Bezerra,Gabriela Voany Galdino; Mesquita,Janaína de Almeida; Pereira,Márcia Rodrigues; Aguiar,Flávio Henrique BaggioThe aim of this study was to evaluate the depth of curing of 10 contemporary blue light-activated dental flowable materials at several opacities, influenced by different irradiation times using FT-IR spectroscopy. Fifty-five specimens (n = 5) with a 5-mm diameter and 1-mm thickness of translucent (Opallis Flow T), yellowed (Master Flow A2; Opallis Flow A2; Natural Flow A2; Fluroshield Yellowed), and opaque mate...
Effects of mouthwashes on Knoop hardness and surface roughness of dental compos...
Miranda,Diogo de Azevedo; Bertoldo,Carlos Eduardo dos Santos; Aguiar,Flávio Henrique Baggio; Lima,Débora Alves Nunes Leite; Lovadino,José RobertoThe aim of this in vitro study was to evaluate the effect of different mouthwashes on superficial roughness and Knoop hardness of two resin composites. Eighty specimens (6 mm Ø and 2 mm height) were prepared and divided into eight experimental groups (n = 10) according to the resin composites (4 Seasons and Esthet X), and storage solutions (G1 - Distilled water; G2 - Colgate Plax Overnight; G3 - Colgate Plax Al...
In vitro assessment of the effectiveness of whitening dentifrices for the remov...
Lima,Débora Alves Nunes Leite; Silva,André Luís Faria e; Aguiar,Flávio Henrique Baggio; Liporoni,Priscila Christiane Suzy; Munin,EgbertoThis in vitro study evaluated the effectiveness of whitening dentifrices for the removal of extrinsic tooth stains. Twenty dental blocks (4 x 4 mm), including enamel and dentine, removed from freshly extracted bovine incisors, were randomly divided into 4 groups: G1 - distilled water, G2 - Colgate, G3 - Crest Extra Whitening and G4 - Rapid White. In all specimens, the dentin was covered with colorless nail poli...
Effect of light curing modes and ethanol immersion media on the susceptibility ...
Aguiar,Flávio Henrique Baggio; Oliveira,Thalita Regina Vieira e; Lima,Débora Alves Nunes Leite; Paulillo,Luis Alexandre Maffei SartiniThe aim of this in vitro study was to evaluate the susceptibility of a hybrid composite resin (Filtek Z250 - 3M ESPE) to staining, when light cured in four different modes and immersed in two different media. Composite resin specimens were randomly prepared and polymerized according to the experimental groups (conventional - 550 mW/cm² / 30 seconds; soft start - 300mW/cm² / 10 seconds + 550 mW/cm² / 20 seconds;...