Bond Strength of 5th, 6th and 7th Generation Bonding Agents To Intracanal Dentin of Primary Teeth

Objectives: this in-vitro study sought to assess the push-out bond strength of a total etch and 2 self-etch bonding systems to intracanal dentin of primary anterior teeth (pat).materials and methods: thirty-six primary anterior teeth were randomly divided into 3 groups of 5th generation (single bond 2), 6th generation (clearfil se) and 7th generation (single bond universal) bonding agents. the canal orifice was res-tored with composite resin and the push-out test was carried out to assess the bond strength. after applying the push-out load, specimens were evaluated under a light microscope at 40x magnification. one-way anova and log-rank test on kap-lan-meier curves were applied for the comparison of bond strength among the 3 groups.results: the mean± standard deviation (sd) bond strength was 13.6±5.33 mpa for single bond 2, 13.85±5.86 mpa for clearfil se and 12.28±5.24 mpa for sin-gle bond universal. the differences in bond strength among the 3 groups were not statistically significant (p>0.05).conclusion: all three bonding agents are recommended for use with composite posts in pat. however, due to high technical sensitivity of the total etch system, single or two-step self etch systems may be preferred for uncooperative children.