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Type: Artigo de periódico
Title: Effect Of Light-curing Method And Indirect Veneering Materials On The Knoop Hardness Of A Resin Cement.
Author: Iriyama, Nelson Tetsu
Tango, Rubens Nisie
Manetta, Izabella Paola
Sinhoreti, Mário Alexandre Coelho
Sobrinho, Lourenço Correr
Saavedra, Guilherme de Siqueira Ferreira Anzaloni
Abstract: This study evaluated the Knoop hardness of a dual-cured resin cement (Rely-X ARC) activated solely by chemical reaction (control group) or by chemical / physical mode, light-cured through a 1.5 mm thick ceramic (HeraCeram) or composite (Artglass) disc. Light curing was carried out using conventional halogen light (XL2500) for 40 s (QTH); light emitting diodes (Ultrablue Is) for 40 s (LED); and Xenon plasma arc (Apollo 95E) for 3 s (PAC). Bovine incisors had their buccal face flattened and hybridized. On this surface a rubber mold (5 mm in diameter and 1 mm in height) was bulk filled with the resin cement. A polyester strip was seated for direct light curing or through the discs of veneering materials. After dry storage in the dark (24 h 37 degrees C), the samples (n = 5) were sectioned for hardness (KHN) measurements, taken in a microhardness tester (50 gF load 15 s). The data were statistically analyzed by ANOVA and Tukey's test (alpha = 0.05). The cement presented higher Knoop hardness values with Artglass for QTH and LED, compared to HeraCeram. The control group and the PAC/Artglass group showed lower hardness values compared to the groups light-cured with QTH and LED. PAC/HeraCeram resulted in the worst combination for cement hardness values.
Subject: Animals
Curing Lights, Dental
Dental Veneers
Hardness Tests
Light-curing Of Dental Adhesives
Materials Testing
Resin Cements
Self-curing Of Dental Resins
Surface Properties
Time Factors
Citation: Brazilian Oral Research. v. 23, n. 2, p. 108-12
Rights: aberto
Identifier DOI: 
Date Issue: -1-Uns- -1
Appears in Collections:Unicamp - Artigos e Outros Documentos

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