Micro-shear bond strength of resin-bonding systems to cervical enamel.
OBJECTIVE
To evaluate the micro-shear bond strength of current adhesive systems to cervical and mid-coronal enamel.


METHODS
Two commercially available resin adhesives were investigated; a self-etching primer system (Clearfil SE Bond) and a one-bottle adhesive system (Single Bond) intended for use with the total-etch wet-bonding technique were employed. Two regions of enamel, cervical and mid-coronal regions, were chosen from the buccal surface of extracted molars and were then bonded with each adhesive system and submitted to the micro-shear bond test. In addition, the conditioned enamel surfaces without any bond and the enamel-resin adhesive interfaces were studied morphologically using scanning electron microscopy (SEM).


RESULTS
No significant differences were found between the adhesive systems used (P > 0.05). However, for both bonding systems, cervical enamel showed significantly lower bonding than mid-coronal enamel (P < 0.05). The relatively lower bond strengths obtained from cervical enamel probably resulted from its aprismatic structure, which appears to be more resistant to dissolving in acids than prismatic mid-coronal enamel.
Shimada
Yasushi
Y
Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Yushima, Tokyo, Japan. shimada.ope@tmd.ac.jp
Kikushima
Daisuke
D
Tagami
Junji
J
D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure; D003747:Dental Enamel Solubility; D017220:Dentin-Bonding Agents; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D008963:Molar; D019279:Resin Cements; D033081:Shear Strength; D013499:Surface Properties; D019237:Tooth Cervix; D019228:Tooth Crown
C438313:Clearfil SE Bond; D017220:Dentin-Bonding Agents; D019279:Resin Cements; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate