Influence of photoirradiation conditions on dentin bond durability and interfacial characteristics of universal adhesives.

The influence of photoirradiation conditions on dentin bond durability and interfacial characteristics of universal adhesives was investigated. Universal adhesives were applied to the dentin surfaces and photoirradiated with 100 mW/cm for 40 s, 200 mW/cm for 20 s, and 400 mW/cm for 10 s. A resin composite was bonded to dentin to determine shear bond strength after 24 h water storage and 30,000 thermal cycles, and water contact angle of cured adhesive were measured by the sessile drop method.