Surface roughness of acrylic resins processed by microwave energy and polished by mechanical and chemical process
Braz. j. oral sci
;
5(16): 977-981, 2006. ilus, tab
Artículo
en Inglés
| LILACS, BBO
| ID: lil-472526
ABSTRACT
The aim of this study was to evaluate the influence of polymerization methods (microwave energy - MW, and water bath - WB) and polishing techniques (chemical - C and mechanical - M) on the surface roughness of one heat-polymerized acylic resin (Vipi-Cril). Forty acrylic resin disk-shaped samples were made according to ADA specification nº 12. Half of samples were processed by microwave energy (500W for 3 minutes), and the other half by water bath (74±1 ºC for 9 hours). After deflasking, the samples were trimmed with a sequence of abrasive aluminum oxide sandpapers of different grades (180, 220 and 400) and divided in 4 groups according to polymerization methods and polishing techniques G1 MW+CP, G2 MW+MP, G3 WB+CP and G4 WB+MP. Surface roughness values were measured using a Surfcorder SE 1700 rugosimeter (Kosaka Laboratory Ltd, Kosaka, Japan). Mann-Whitney test (p=.05) indicated significant differences between polishing methods processed by microwave energy (p= .0018), and between polishing methods processing by water bath (p= .0002). Samples processed by both methods (water bath or microwave energy) showed smoother surfaces when polished by mechanical polishing method, and polymerization methods did not influence in surface roughness.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Propiedades de Superficie
/
Resinas Acrílicas
/
Pulido Dental
Idioma:
Inglés
Revista:
Braz. j. oral sci
Asunto de la revista:
Odontología
Año:
2006
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
State University of Campinas/BR
/
Universidade Estadual de Campinas/BR
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