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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/8619

Title: Surface roughness of acrylic resins processed by microwave energy and polished by mechanical and chemical process
Authors: Rizzatti-Barbosa, Célia M.
Gabriotti, Morgana N.
Silva-Concilio, Laís Regiane
Joia, Fabio A.
Machado, Cristiane
Ribeiro, Margarete Cristiane
Keywords: acrylic resin, polishing, surface roughness, microwave processing
Issue Date: 31-Dec-2006
Publisher: Piracicaba Dental School - UNICAMP
Citation: Brazilian Journal of Oral Sciences (ISSN: 1677-3225) Vol 5 Num 16
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 n° 12. Half of samples were processed by microwave energy (500W for 3 minutes), and the other half by water bath (74±1 °C 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.
URI: http://hdl.handle.net/1807/8619
Other Identifiers: http://www.bioline.org.br/abstract?id=os06009
Rights: Copyright 2006 - Piracicaba Dental School - UNICAMP São Paulo - Brazil
Appears in Collections:Bioline International Legacy Collection

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