Prerestorative bleaching: effect on microleakage of Class V cavities.
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.
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Department of Primary Patient Care, School of Dentistry, University of Louisville, Kentucky 40292.
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
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