Abstract
The marginal contraction gap between dentin and restored composite resin was observed microscopically. Their shear bond strengths were also determined. Dentin was either treated or not by Gluma before the application of four different bonding agents, and restored subsequently by a microfilled composite resin.
Marginal contraction gap as detectable in all cases without Gluma pretreatment. No significant differences were observed in regard to the four bonding agents applied. In these cases, the mean shear strength was 1〜3 MPa, in contrast to those of applied Gluma, 8〜15 MPa.
