Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/198559
Type: Artigo de periódico
Title: Effect Of Different Light-curing Devices And Aging Procedures On Composite Knoop Microhardness.
Author: Voltarelli, Fernanda Regina
dos Santos-Daroz, Claudia Batitucci
Alves, Marcelo Corrêa
Peris, Alessandra Rezende
Marchi, Giselle Maria
Abstract: The aim of this study was to evaluate the effect of light-curing devices (Halogen/HAL, Light Emitting Diodes/LED, Argon Laser/LAS and Plasma Arc/PAC) and aging procedures (Mechanical Cycling/MC, Thermal Cycling/TC, Storage/S, MC+TC and MC+TC+S) on the micro-hardness of bottom/B and top/T surfaces of 2-mm-high composite resin cylinders. The Knoop microhardness test (25 g, 20 s) on both B and T was performed before and after each aging procedure. For B and T, before aging procedures, PAC showed reduced polymerization effectiveness when compared with HAL. In the T, after TC, PAC and LAS had also showed reduced polymerization effectiveness when compared to HAL and LED. For all light-curing devices, MC+TC+S and S affected the Knoop microhardness values. In the B, no difference could be observed among the aging procedures for PAC. From all light-curing units, PAC may have rendered composites of reduced quality and the storage aging procedures were the most harmful to the polymer hardness.
Subject: Analysis Of Variance
Composite Resins
Curing Lights, Dental
Dental Stress Analysis
Hardness Tests
Light-curing Of Dental Adhesives
Lighting
Materials Testing
Polymers
Surface Properties
Time Factors
Rights: aberto
Identifier DOI: 
Address: http://www.ncbi.nlm.nih.gov/pubmed/20027457
Date Issue: -1-Uns- -1
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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