Objective To evaluate the effect of light irradiation intensity on bond durability of dual-cured resin luting agents to silanized ceramics. Methods Linkmax HV（LMHV）, Nexus 2（NX2）, Variolink Ⅱ HV（VLⅡHV） as dual-cured resin luting agents were bonded to silanized GN-Ⅰ glass ceramics, and irradiated by 800, 310 and 80mW·cm-2 light intensity to form micro-shear test specimens. After 1, 90 d water storage, micro-shear bond strength of silanized resin/ceramic luting agent were measured. Data of each resin luting agent were analyzed by one-way ANOVA. Results 90 d water storage decreased significantly the bond strength of all test groups, and the weak of irradiation intensity did not deteriorate this reduction of bond strength of luting resin/cermaic, oppositely in which LMHV irradiated by 310 mW·cm-2 light intensity and NX2 irradiated by 80 mW·cm-2 showed the higher bond strength than that irradiated by 800 mW·cm-2. Conclusion The weak of irradiation intensity does not affect the bond durability of dual-cured resin luting agents to silanized ceramics.
