595
JCDP
ABSTRACTPurpose: Bioactive glass air abrasion is a conservative tech nique for removal of initial decalcified enamel superficial layer and caries vs alumina air abrasion. This study evaluated shear bond strength of composite resin to sound and decalcified deciduous enamel using etchandrinse and selfetch adhesives after alumina and bioactive glass air abrasion.
Materials and methods:Ninety-six flat enamel surfaces, mounted in acrylic resin, were prepared from 48 deciduous molars. Half of the specimens were decalcified with a demineralizing solution. Both intact and decalcified specimens were assigned to two groups for alumina and bioactive glass air abra sion. In each group, the specimens were subdivided into two groups for application of Clearfil SE Bond or Optibond FL adhe sives (n = 12). After composite resin bonding, the specimens underwent shear bond test. Data were analyzed using three-way analysis of variance (ANOVA), linear regression model and independentsample t-test (α = 0.05).Results: No significant differences were noted in bond strength of composite resin after alumina or bioactive glass air abrasion (p = 0.272). Optibond FL adhesive and enamel decalcification produced higher bond strength (p = 0.000, p = 0.001 respectively).
Conclusion:In this study, bioactive glass air abrasion produced bond strength comparable to the conventional method. This technique might be an alternative method for preparation of normal and/or decalcified enamel of deciduous teeth for resin bonding.