Adhesion of Resin Cement to Zirconia Using Argon Plasma and Primer

摘要

Purpose: To evaluate the effectiveness of nonthermal atmospheric plasma (NTAP) and primer on the shear bond strength (SBS) of a resin cement to two zirconia ceramics after 24 hours and 1 year of water storage. Materials and Methods: A total of 120 plates (9 x 7 x 2 mm) were obtained from two types of zirconia (Katana, Kuraray Noritake; and ZirCAD, Ivoclar Vivadent; n = 60 each) and randomly divided into 12 groups (n = 10 each). Zirconia ceramic plates were submitted to the following treatments: (1) untreated (control); (2) Z-Prime Plus primer; (3) NTAP (Plasma Tool Model SAP) application for 10 seconds; (4) NTAP application for 30 seconds; (5) NTAP application for 10 seconds + primer; and (6) NTAP for 30 seconds + primer. Two silicone molds (2.37-mm diameter x 2-mm height) were positioned on the treated surface of each zirconia plate, and the resin cement (Panavia F 2.0, Kuraray Noritake) was manipulated and inserted into the molds. After light activation, two resin cement cylinders (specimens) were obtained from each plate. One specimen was tested after 24 hours, and the other after 1 year. The shear load was applied to the base of the resin cement cylinders until failure. Data were analyzed using three-way ANOVA and post hoc Tukey test (alpha = .05). Results: NTAP application alone (groups 3 and 4) increased SBS compared to the control group at 24 hours. After 1 year, NTAP + primer showed higher SBS than the other groups. Water storage for 1 year reduced the bond strength for all groups. Conclusion: NTAP, combined or not combined with primer, had a beneficial effect on adhesion after 24 hours and after 1 year. Water storage negatively influenced the adhesion in all groups.