Revista de Odontologia da UNESP
https://revodontolunesp.com.br/journal/rou/article/588018d37f8c9d0a098b4e38
Revista de Odontologia da UNESP
Original Article

Flexural strength of an acrylic resin after incorporation of an antimicrobial polymer

Resistência à flexão de uma resina acrílica após a incorporação de um polímero antimicrobiano

Oliveira Júnior, N.M.; Paleari, A.G.; Rodriguez, L.S.; Marin, Danny Omar Mendoza; Pero, A.C.; Compagnoni, M.A.

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Abstract

Introduction: The incorporation of antimicrobial agents in acrylic resins can be an alternative to prevent denture stomatitis in partial or complete denture wearers. However, these agents can affect the mechanical properties of denture base acrylic resin. Objective: This study investigated the effect of incorporation of antimicrobial polymer 2-tert-butylaminoethyl methacrylate (PTBAEMA) on flexural strength of an acrylic resin. Material and method: Rectangular specimens were from a denture base acrylic resin (Lucitone 550) containing 0% (control), 1, 2.5, 5 and 10% of PTBAEMA. Data of flexural strength were evaluated by one way ANOVA, followed by Tukey test (a = 0.05). Result: It was observed that flexural strength significantly decreased (p < 0.05) after the addition of PTBAEMA: 0% (91.3 ± 13.7A), 1% (71.4 ± 7.7B), 2.5% (9.4 ± 1.5C); 5% (7 ± 1.7C) e 10% (7 ± 1.2C). Conclusion: Flexural strength was detrimentally affected after incorporation of PTBAEMA. Future studies are necessary to evaluate if the 1% concentration allows clinical application for the acrylic resin studied, since flexural strength obtained was within ISO recommendations.

Keywords

Antimicrobial agents, acrylic resins, denture bases, denture complete.

Resumo

Introdução: A incorporação de agentes antimicrobianos a resinas acrílicas pode ser uma alternativa para evitar a estomatite protética em usuários de próteses totais ou parciais removíveis. Entretanto, estes agentes podem afetar as propriedades mecânicas das resinas acrílicas para base protética. Objetivo: Esse estudo investigou o efeito da incorporação do polímero antimicrobiano 2-tert-butilaminoetil metacrilato (PTBAEMA) na resistência à flexão de uma resina acrílica. Material e método: Foram confeccionados espécimes de formato retangular a partir de uma resina acrílica para base protética (Lucitone 550) contendo 0% (controle), 1, 2,5, 5 e 10% de PTBAEMA. Os dados de resistência à flexão foram avaliados por meio de análise de variância a um fator seguida pelo teste de Tukey (a = 0,05). Resultado: Observou-se que a resistência à flexão diminuiu significantemente (p < 0,05) após a adição de PTBAEMA: 0% (91,3 ± 13,7A), 1% (71,4 ± 7,7B), 2,5% (9,4 ± 1,5C); 5% (7 ± 1,7C) e 10% (7 ± 1,2C). Conclusão: A resistência à flexão foi adversamente afetada após a incorporação do PTBAEMA. Futuros estudos são necessários para avaliar se a concentração de 1% permite uma possível aplicabilidade clínica para a resina acrílica estudada, visto que nesta concentração a resistência à flexão está dentro do limite estabelecido pela ISO (65 MPa).

Palavras-chave

Agentes antimicrobianos, resinas acrílicas, bases de dentadura, prótese total.

References



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