Effects of multiple adhesive coatings on dentin bonding.
Simple changes to bonding techniques can improve resin-dentin bond strengths. This study evaluated the effect of multiple consecutive coatings of adhesive resin on dentin by measuring both microtensile bond strength and nano-leakage following exposure to ammoniacal silver nitrate. Resin-dentin bonded specimens were prepared using two total-etch adhesives (OptiBond Solo Plus/Kerr or Single Bond/3M ESPE). During bonding, resin application and air evaporation were done 1, 2, 3, 4, 6 or 8 times on acid-etched, moist dentin surfaces. Mean microtensile bond strengths were evaluated by two-way ANOVA and Fisher's PLSD test (p<0.05; n=16 for each group). Additionally, nanoleakage of silver nitrate was evaluated by transmission electron microscopy (TEM). The results indicated that bond strengths increased with each coating up to four coats. Nanoleakage decreased with each coat, becoming very small after four or more coats. This adhesive application method can be easily applied to clinical practice, thereby improving the quality of resin-dentin bonds.
Division of Pediatric Dentistry, Hokkaido University, Graduate School of Dental Medicine, Hokkaido, Japan. masanori-h@mue.biglobe.ne.jp
Masanori
M
Hashimoto
Hidehiko
H
Sano
Eiji
E
Yoshida
Minoru
M
Hori
Masayuki
M
Kaga
Haruhisa
H
Oguchi
David H
DH
Pashley
D001641:Bicuspid; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D001840:Dental Bonding / Q000379:methods*; D003763:Dental Leakage; D003799:Dental Stress Analysis; D003804:Dentin; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents; D006801:Humans; D008422:Materials Testing; D008854:Microscopy, Electron; D019279:Resin Cements; D013718:Tensile Strength
D003188:Composite Resins; D017220:Dentin-Bonding Agents; C451600:OptiBond Solo Plus; D019279:Resin Cements; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate