Surface properties and color stability of an acrylic resin combined with an antimicrobial polymer

• Autor(a) principal: Pero,Ana Carolina
• Data de Publicação: 2013
• Outros Autores: Ignárcio,Jaqueline, Giro,Gabriela, Mendoza-Marin,Danny Omar, Paleari,André Gustavo, Compagnoni,Marco Antonio
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista de Odontologia da UNESP
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1807-25772013000400002
• topic: Acrylic resins; products with antimicrobial action; wettability; color; physical properties

INTRODUCTION: The occurrence of stomatitis is common since the surface characteristics of the dentures may act as reservoirs for microorganisms and have the potential to support biofilm formation. PURPOSE: To assess the surface properties (wettability/roughness) and color stability of an acrylic resin combined with the antimicrobial polymer poly (2-tert-butylaminoethyl) methacrylate (PTBAEMA). MATERIAL AND METHOD: Thirty disc-shaped specimens of an acrylic resin (Lucitone 550) were divided into three groups: 0% (control); 5% and 10% PTBAEMA. Surface roughness values (Ra) were measured using a profilometer and wettability was determined through contact angle measurements using a goniometer and deionized water as a test liquid. Color data were measured with a spectrophotometer. Kruskal-Wallis and Dunn's test were used to compare roughness values. Wettability data were analyzed using ANOVA and Tukey's test. Color data were compared using the Student's t-test and ∆E values were classified according to the National Bureau of Standards (NBS). All statistical analyses were performed considering α=.05. RESULT: Significant differences (p<.05) were detected among the groups for roughness, wettability and color stability. According to the NBS, the color changes obtained in the 5% and 10% PTBAEMA groups were "appreciable" and "much appreciable", respectively. CONCLUSION: It could be concluded that PTBAEMA incorporation in an acrylic resin increased the roughness and wettability of surfaces and produced color changes with clinical relevance.