2007 Volume 50 Issue 3 Pages 325-331
Extracted human teeth have been used for teaching composite restoration procedures in dental schools, however, it is becoming difficult to procure extracted human teeth. The purpose of this study was to evaluate the bond strengths to artificial enamel and dentin of the resin composite adhesive systems:AQ Bond Plus (AQ), Clearfil Mega Bond and Single Bond. Artificial teeth were mounted in self-curing acrylic resins and facial surfaces were wet-ground with #600 SiC paper. Enamel and dentin surfaces were treated with each adhesive system. Shear bond strength was measured after storage in water for 5 min or 24 h at a cross-head speed of 1.0mm/min. Enamel bond strengths ranged from 8.2 to 12.9 MPa for the group of 5 min and from 8.9 to 17.9 MPa for the group of 24 h. Dentin bond strengths ranged from 7.1 to 14.0 MPa for the group of 5 min and from 7.5 to 19.8 MPa for the group of 24 h. There was no significant difference between the 5 min and 24 h group for AQ. From the results of this in vitro study, artificial teeth could be used as a substitute for extracted human teeth.
