Evaluation of Microleakage of Self-Adhesive Composite Resin in Pits and Fissures of Extracted Premolar Teeth: An in Vitro Study

Background and objectives: Microleakage at the interface of tooth structure and fissure sealant plays a crucial role in failure of the treatment. This in vitro study aimed to determine the microleakage of self-adhesive flowable composite resins as pit and fissure sealants. Material and Methods: ۶۰ healthy extracted premolar teeth were randomly divided into the ۴ groups (n=۱۵), group ۱) clinpro sealants (control), group ۲) flowable composite resin with bonding agent (total-etch), group ۳) flowable composite resin with self-etch bonding agent, and group ۴) self-adhesive composite resin. After thermocycling the specimens were immersed in ۲% methylene blue for ۴۸ hours and then sectioned in the buccolingual direction. The microleakage was assessed by dye penetration using a stereomicroscope at ۱۵X magnification. Data analysis was performed using SPSS version ۱۸.۰ as well as Mann-Whitney and Kruskal-Wallis tests. Results: There was a statistically significant difference in microleakage score between the groups (P-value = ۰.۰۰۶). The lowest mean of microleakage level was observed in the flowable composite group with total-etch bonding (group ۲) ۱.۲۶±۰.۹۶, followed by the Clinpro sealant group (group ۱) ۱.۶۲±۱.۲۰, and then the self-adhesive composite group (group ۴) ۱.۸۵±۱.۰۰. Conclusion: Based on the results of this study, the microleakage of self-adhesive composite resin revealed no significant difference with conventional fissure sealant; however, the microleakage of these composite resin was higher than flowable composite resin with total-etch bonding agent.

Keywords:

Dental Leakage , Pit and Fissure Sealants , Composite Resins , Bicuspid