Abstract
Purpose: This study evaluated in vitro the durability of the bond between resin cement and Y-TZP ceramic, testing the effect of different surface treatments and the previous application of an adhesive system over the ceramic. Methods: Forty Y-TZP ceramic plates were distributed into four experimental groups (n=10) according to the combination between surface treatment (air abrasion or Er:YAG laser irradiation) and adhesive system application (Scotchbond Multi Purpose – catalyst or Single Bond 2) in the plate previously to the use of the resin cement. After the surface treatment, resin cement cylinders were built using 0.8x1mm matrices (diameter x height). In each group, 5 specimens were tested for microshear after 24h, and other 5 specimens were tested after 6 months of water storage. Results: Regardless of the adhesive system or period, greater means were obtained in air abraded groups. No statistically significant difference between adhesive systems or periods. Conclusion: It could be concluded that the air abrasion improves bonding to T-TZP ceramic, regardless of the adhesive system used to coat zirconia ceramic surfaces.
Highlights
This study evaluated in vitro the durability of the bond between resin cement and Y-TZP ceramic, testing the effect of different surface treatments and the previous application of an adhesive system over the ceramic
Resumo Objetivo: Este estudo avaliou in vitro a durabilidade da união do cimento resinoso à cerâmica Y-TZP, verificando o efeito de diferentes tratamentos de superfície e da aplicação prévia do sistema adesivo na peça
Purpose: This study evaluated in vitro the durability of the bond between resin cement and Y-TZP ceramic, testing the effect of different surface treatments and the previous application of an adhesive system over the ceramic
Summary
Professora Adjunto do Curso de Odontologia e da Faculdade de Odontologia da Universidade Federal da Bahia. Resumo Objetivo: Este estudo avaliou in vitro a durabilidade da união do cimento resinoso à cerâmica Y-TZP, verificando o efeito de diferentes tratamentos de superfície e da aplicação prévia do sistema adesivo na peça. Metodologia: Quarenta placas de cerâmica foram distribuídas em quatro grupos experimentais (n=10) de acordo com a combinação entre tratamento de superfície (abrasão a ar ou irradiação com laser de Er:YAG) e aplicação de dois diferentes tipos de sistema adesivo (Scotchbond Multi Purpose - catalisador e Single Bond 2) sobre a peça previamente à inserção do cimento resinoso. Resultados: Independentemente do adesivo e do tempo, as maiores médias foram obtidas nos grupos submetidos à abrasão a ar. Conclusão: Pode-se concluir que a abrasão a ar e o uso do agente adesivo quimicamente ativado sobre a peça podem melhorar a união à zircônia.
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