Bond Strength of Universal Resin Cements on Various Surfaces

Objectives: To compare bond strength of different universal resin cements on various surfaces.
Methods: Three substrates were used for testing: lithium disilicate (e.max), porcelain (Empress) and Zirconia. Substrates were exposed and polished with 600 grit SiC sandpaper, followed by sandblasting with 50 µm aluminum oxide powders at the pressure of 60 psi. All specimens were then thoroughly rinsed with water. Four universal resin cements were used with corresponding bonding agents and silane primers: 1) Cem EZ (Danville), with Prelude One (Danville) on tooth structures and light cured, metal and zirconia, and S Bond (Danville) on Emax; 2) Panavia 21 (Kuraray, white); 3) Multilink Automix (Ivoclar Vivadent, white) and 4) NX3 (Kerr, universal, with OptiBond XTR); 5) Relyx Ultimate (3M, universal). All primers or bonding agents on substrates were used according to their IFUs. All specimens were prepared using the Ultradent bonding jig (D=2.38mm) with cements in the composite well, with all cements self-cured, with 8 specimens for each set. Shear bond strength (SBS) was tested after storage in de-ionized water (37°C, 24 hours).
Results: Shear bond strength are shown in Table 1.
Conclusions: Compared to competitors, Cem EZ has the best or similar bond strength on tested substrates.