Bond strength of glass-ceramic cemented to a zirconia structure: influence of adhesive cementation strategy

Abstract

Objective This study evaluated the shear bond strength (SBS) of lithium disilicate glass (LDG) ceramic bonded to a zirconia (Y-TZP), using different cementation strategies. Methods LDG ceramic cylinders were cemented to Y-TZP structure according to the following adhesive system (AS)/resin cement (RC) (n = 15): U- self-adhesive dual-cure RC; AMBAR- AS containing phosphate monomers (PM) + dual-cure RC; group SBU: PM+Silane/AS + light-cure RC; group ALLB: PM/AS + dual-cure RC. Specimens were subjected to SBS in a universal testing machine (0.5 mm/min). Data (MPa) were subjected to one-way ANOVA and Tukey's test (α = 0,05). Results The groups SBU and ALLB had significantly higher SBS than those provided by the group U, in which the lowest values were observed. For the AMBAR group, intermediate SBS values were found, which did not differ significantly from the values observed in the other groups. Conclusion Regardless of resins cement, the use of adhesives containing phosphate monomers provided superior bond strength than self-adhesive cement.

Mecanismos de Adesão e Processos de Cimentação de Cerâmicas Ácido Resistentes

“…Entretanto esse tipo de cimentação levava a um grande número de insucessos clínicos, em virtude de falhas na cimentação ou por questionamentos estéticos 8 . Assim, dentre os inúmeros materiais encontrados atualmente, os cimentos resinosos são os mais utilizados em cerâmicas odontológicas, por apresentarem alta resistência de união com o substrato dental 17 .…”