2004 Volume 22 Issue 3 Pages 206-216
The study was aimed to investigate the effect of blue-light LED irradiation on bond strength to dentin created with 3 all-in-one adhesives (AQ Bond, AQ Bond Plus and i Bond). Extracted human premolars were used. One of the all-in-one adhesives was applied according to manufacturer's instructions on the coronal flat dentin surfaces ground with # 600 SiC papers. After irradiation with a LED apparatus (Radius, Osada Electric Co.) for 30 or 60 seconds, a resin composite was placed on it and light cured. The specimens were stored in water at 37°C for 24 hours, and then microtensile bond strength to denti nwas measured. For a control condition, irradiation with a halogen lamp was carried out followed by the manufacturers' instructions. For LED irradiation, AQ Bond did not bond to dentin. There was no difference in bond strength between 30 and 60 seconds irradiations with LED in AQ Bond Plus and i Bond. Irradiation with a halogen lamp gave higher bond strength than that with LED in i Bond. These results suggested that compatibility between catalytic systems and light sources was to be considered as well as light energy of LED in all-in-one adhesive/dentin adhesion.
