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Resin bonding to Er : YAG laser‐irradiated dentin: combined effects of pre‐treatments with citric acid and glutaraldehyde
Author(s) -
Kameyama Atsushi,
Oda Yutaka,
Hirai Yoshito,
Kawada Eiji,
Takizawa Masakazu
Publication year - 2001
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1034/j.1600-0722.2001.00075.x
Subject(s) - dentin , citric acid , irradiation , bond strength , ultimate tensile strength , materials science , glutaraldehyde , scanning electron microscope , nuclear chemistry , er:yag laser , composite material , chemistry , adhesive , chromatography , organic chemistry , nuclear physics , physics , layer (electronics)
The purpose of this study was to evaluate the combined effects of citric acid and glutaraldehyde (GA) on the resin bonding to Er : YAG laser‐irradiated dentin. Bovine dentin was prepared with 180‐ to 600‐grit SiC paper and then uniformly irradiated with an Er : YAG laser (laser‐irradiated group) or immersed in water at 60°C for 15 min (heated group). The samples were then acid‐conditioned with 10% citric acid (10‐0) or 10% citric acid/3% ferric chloride (10‐3) for 15 s and treated with GA for 10 min before bonding to an acrylic rod with 4‐META/MMA‐TBB resin. These samples were trimmed to prepare miniaturized dumbbell‐shaped specimens. After storage in water at 37°C for 1 d, the tensile bond strength was measured, and the fractured surface was evaluated using a scanning electron microscope (SEM). In the laser‐irradiated and heated groups, the 10‐3+GA‐treated specimen had higher bond strength than that of 10‐0+GA. On the other hand, the tensile bond strength of 10‐3+GA in the non‐irradiated group was lower that that of 10‐0+GA. In conclusion, the combination of 10‐3 and GA for bonding with 4‐META/MMA‐TBB resin was the most effective for Er : YAG laser‐irradiated dentin and heated dentin, but it was not effective for the non‐irradiated dentin.