Enamel and dentin bond strengths of single application bonding systems.
OBJECTIVE
To investigate the bonding ability to enamel and dentin of new single application bonding systems (Reactmer and One-Up Bond) and compare these with a commercial compomer (Clicker/F2000), and 2-step resin-based composite bonding systems (Fluoro Bond/Lite-Fil II A and Single Bond/Z100).


METHODS
Labial surfaces of extracted bovine teeth were ground on wet 600-grit SiC paper to expose a flattened area of enamel or dentin and then washed and dried with oil-free compressed air. These surfaces were treated according to each adhesive system's instructions and the restorative materials were condensed into a Teflon mold (2 mm height, 4 mm internal diameter) and then irradiated. The finished specimens were stored in 37 degrees C distilled water for 24 hours from the start of light exposure to the material. Then these specimens were tested in a shear mode at a crosshead speed of 1.0 mm/minute. The mean and standard deviation were subjected to an ANOVA followed by the Duncan test (P< 0.05).


RESULTS
The bond strengths of the single application bonding systems were 12.3 to approximately 14.5 MPa for enamel, and 13.7 to approximately 13.8 MPa for dentin. These values were comparable to those of the compomer (12.6 MPa for enamel, and 13.1 MPa for dentin), but lower than those of the two-step resin composite bonding systems (16.8 to approximately 21.7 MPa for enamel and 18.1 to approximately 18.4 MPa for dentin).
Miyazaki
S
S
Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan. miyazaki-m@dent.nihon-u.ac.jp
Iwasaki
K
K
Onose
H
H
Moore
B K
BK
D000704:Analysis of Variance; D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate; D002417:Cattle; D020770:Compomers; D003188:Composite Resins; D001840:Dental Bonding / Q000379:methods*; D003738:Dental Cements; D003743:Dental Enamel; D003804:Dentin; D017220:Dentin-Bonding Agents; D005460:Fluorides, Topical; D005899:Glass Ionomer Cements; D008422:Materials Testing; D008689:Methacrylates; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements; D018709:Statistics, Nonparametric; D013314:Stress, Mechanical; D013718:Tensile Strength
D020770:Compomers; D003188:Composite Resins; D003738:Dental Cements; D017220:Dentin-Bonding Agents; C118368:F2000 cement; C444701:Filtek Z250; D005460:Fluorides, Topical; C072652:FluoroBond; D005899:Glass Ionomer Cements; C083468:Lite-fil CR; D008689:Methacrylates; C446260:One-Up-Bond F; D019279:Resin Cements; C086113:palfique estelite; C447779:reactmer bond; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate