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Surface roughness of acrylic resins processed by microwave energy and polished by mechanical and chemical process
Rizzatti-Barbosa, Célia M; Gabriotti, Morgana N; Silva-Concilio, Laís Regiane; Joia, Fabio A; Machado, Cristiane Ribeiro; Ribeiro, Margarete Cristiane.
  • Rizzatti-Barbosa, Célia M; State University of Campinas. Piracicaba Dental School. Department of Prosthesis and Periodontology. BR
  • Gabriotti, Morgana N; State University of Campinas. Piracicaba Dental School. Department of Prosthesis and Periodontology. BR
  • Silva-Concilio, Laís Regiane; State University of Campinas. Piracicaba Dental School. Department of Prosthesis and Periodontology. BR
  • Joia, Fabio A; State University of Campinas. Piracicaba Dental School. Department of Prosthesis and Periodontology. BR
  • Machado, Cristiane Ribeiro; Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba. BR
  • Ribeiro, Margarete Cristiane; State University of Campinas. Piracicaba Dental School. Department of Prosthesis and Periodontology. BR
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.
Asunto(s)
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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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