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Self-etching primers--an alternative to the conventional acid etch technique?
U B Fritz1, P Diedrich, W J Finger
1Department of Orthodontics, University of Aachen, Germany. ulrikefritz@hotmail.de
Material And Methods:
The aim of the present in vitro study was to evaluate the bonding capacity of three self-etching primers (Clearfil SE Bond [SE], Clearfil Liner Bond 2V [CLB], Novabond [NOVA]) to enamel. Two adhesive systems with a separate phosphoric acid etching procedure (Gluma Comfort Bond [GLU], Kurasper F [KU]) served as controls. 60 human incisors were used to evaluate shear bond strengths of composite cylinders to enamel.
Results:
Significant differences were found between the groups (p < 0.001). The mean value for groups GLU, KU, CLB and SE was 24 MPa. The shear bond strength recorded for the Novabond system was significantly lower (17 MPa).
Conclusion:
The results of the present investigation indicate that enamel bonding especially with the self-etching primers CLB and SE is as effective as conventional phosphoric acid etching.