effect of carbamide-peroxide gel on microleakage of composite resin restorations

ABSTRACT

This study aimed to report the effect of home-use carbamide-peroxide gel on microleakage of composite filled class V cavities. Specimens were thermocycled and immersed in bleaching solution for one, three or six hours daily for one month. Then, the restored teeth were placed in methylene blue dye and sectioned. The extent of dye penetration along the tooth-restoration interface was compared. The results indicated that significantly more leakage was associated with prolonged bleaching. It may be advantageous to limit the use of home-bleaching agents when composite resin restorations are present