Published Paper Details:

Objective: The purpose of this in vitro study was to evaluate the effect of polyacrylic acid as dentin priming agent on tensile bond strength of self adhesive resin cements to dentin. Materials and method: Extracted premolar which were selected for the study were mounted in self cure acrylic which were trimmed buccally with the help of diamond disc under running water and was smoothened with abrasive paper (180 grit) for flat surface. Zirconium block with 3mm diameter and 5mm height with through and through hole of diameter were designed and fabricated with the help of CAD CAM milling machine. Teeth were divided into three groups according to dentin surface treatments 1) Group A- Control group (without dentin pre-treatment ) 2) Group B- 11.5% polyacrylic acid treated group 3) Group C- 25% polyacrylic acid treated group. The zirconium blocks were bonded to dentin surfaces with self adhesive resin cements which were tested for tensile bond strength. All the data was statistically analyzed. The comparison between three groups was done by one-way ANOVA test for continuous data and followed by post-hoc multiple comparison test The de-bonded surface were evaluated with scanning electron microscope for assessing mode of failure. Results: There was a significant difference between the groups and on applying post hoc the difference was found between group C with the group B and group A. The mean tensile bond strength of group C was found to be statistically significantly higher statistically than that of group B and group C. (p<0.05). Conclusion: Within the limitations of this in vitro study, group C showed higher tensile bond strength when compared to group A and group B. Dentin pretreatment with group C increased the bond strength of self adhesive resin cement.