Interaction of different concentrations of 10-MDP and GPDM on the zirconia bonding

Author(s)

Calamita, Rafael Soares ; Oliveira, Amanda Andre Diniz ; Pizzanelli, Giulia Gamero ; Salvador, Marcos Vinicius Oliveira ; Mesquita, Alfredo Mikail Melo ; Pecorari, Vanessa Galego Arias ; Lima, Adriano F.

• Document type: Journal article
• Source: Dental Materials; v. 39, n. 7, p. 4-pg., 2023-06-28.

Abstract

Objectives: To analyze the influence of different concentrations of 10-MDP and GPDM used, combined or not, on the bonding to zirconia. Methods: Specimens of zirconia and a resin-composite (7 mm length, 1 mm width, and 1 mm thick) were obtained. The experimental groups were obtained according to the functional monomer (10-MDP and GPDM) and the concentrations (3 %, 5 %, and 8 %). For the groups with combined 10-MDP and GPDM, the agents were used with a proportion of 50 %/50 % wt until reaching the 3 %, 5 % and 8 % concentrations. All monomers were diluted in ethanol to obtain the primers. Two control groups were established: ethanol (negative control) and a commercial reference Monobond N (positive control). The zirconia surface treatment was performed with the primer application followed by the bonding to a resin-composite sample with a light-curing resin cement. Twenty-four hours after the adhesive procedure, a microtensile test was performed and the failure pattern of each sample was analysed with a stereoscopic magnifying glass. Data were analysed by a two-way ANOVA and Dunnet test. Results: All experimental primers presented a higher bond strength than the negative control (ethanol). Excepting the 8 % GPDM primer, all groups presented statistically similar bond strength compared to the positive control, with a predominance of adhesive failure. Significance: 10-MDP, GPDM, and the combination of both for the concentrations tested promote an effective chemical bonding to zirconia. However, using 10-MDP and GPDM in the same primer has no synergistic effect. (AU)

• FAPESP's process: 20/14653-0 - Effect of type and concentration of functional monomers on the bonding of resin cements to zirconia
• Grantee: Rafael Soares Calamita
• Support Opportunities: Scholarships in Brazil - Scientific Initiation