title: Prerestorative bleaching: effect on microleakage of Class V cavities.
abstract: The effect of bleaching extracted teeth on the microleakage of subsequently placed Class V composite resin restorations was evaluated. Ten extracted premolars were stored in water at 37 degrees C to serve as controls. Ten premolars were exposed to a carbamide peroxide gel for three 2-hour periods per day for 9 days. These specimens were stored in water at 37 degrees C except during treatment periods. Class V cavity preparations were then placed at the cementoenamel junction of the facial and lingual surfaces of all teeth. Half of the teeth of each group were restored with Scotchbond 2/Silux Plus and half were restored with Prisma Universal Bond 3/AP.H. After 24 hours of storage in 37 degrees C water, the teeth were thermally stressed for 100 cycles. Microleakage was assessed by dye penetration. The results demonstrated that prerestorative bleaching did not affect the marginal seal of subsequently placed restorations.
authors.affiliation: Department of Primary Patient Care, School of Dentistry, University of Louisville, Kentucky 40292.
authors.forename: G A
authors.initials: GA
authors.lastname: Crim
mesh_terms: D000704:Analysis of Variance; D000077463:Carbamide Peroxide; D003188:Composite Resins; D003743:Dental Enamel / Q000187:drug effects*; D003745:Dental Enamel Permeability; D003763:Dental Leakage; D003804:Dentin / Q000187:drug effects; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D006801:Humans; D010545:Peroxides / Q000494:pharmacology*; D019279:Resin Cements; D013499:Surface Properties / Q000187:drug effects; D014073:Tooth Bleaching; D014508:Urea / Q000031:analogs & derivatives* / Q000494:pharmacology
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D010545:Peroxides; D019279:Resin Cements; C062652:Prisma Universal Bond; C067788:scotchbond 2; D000077463:Carbamide Peroxide; D014508:Urea