The efficacy of lining materials in the reduction of microleakage in class II composite resin restoration using the sandwich technique: A stereomicroscopic study.

BACKGROUND

The sealing ability of different liners under composite restorations in the reduction of microleakage.

AIM

To evaluate the effects of three different liners in sandwich techniques on gingival microleakage of class II composite restorations.

MATERIALS AND METHODS

Standardized Class II box cavities were prepared on forty premolar teeth and randomly divided into four groups, = 10: Group A, no liner (control); Group B, Polofil NHT Flow; Group C, Ionolux; and Group D, Fuji VII. The etching, bonding, and process for restoring the whole remaining mass of the cavities with G-aenial composite were the same, with the sandwich material expectations. Dye penetration was evaluated using a stereomicroscope.

STATISTICAL ANALYSIS

Duncan's analysis and Friedman's test.

RESULTS

Group A showed the highest microleakage followed by Group D, Group C, and Group B.

CONCLUSION

Polofil NHT Flow seems to be a promising liner for gingivally deep class II cavities.