Effect of different light-curing devices and aging procedures on composite knoop microhardness
Braz. oral res
; 23(4): 473-479, Oct.-Dec. 2009. ilus, graf, tab
Article
em En
| LILACS
| ID: lil-534220
Biblioteca responsável:
BR1.1
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.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Resinas Compostas
/
Cura Luminosa de Adesivos Dentários
/
Lâmpadas de Polimerização Dentária
/
Testes de Dureza
Idioma:
En
Revista:
Braz. oral res
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2009
Tipo de documento:
Article
/
Project document
País de afiliação:
Brasil
País de publicação:
Brasil