title: The effect of carbamide peroxide bleach on the tensile bond strength of ceramic brackets: an in vitro study.
abstract: Recent advances in cosmetic dentistry have led to the development of a variety of new products and techniques including vital bleaching and ceramic brackets. Therefore this study was conducted to see whether the use of an at-home carbamide peroxide bleaching agent before bonding affected the tensile bond strength of a precoated ceramic orthodontic bracket. Sixty extracted human premolar teeth were randomly separated into three groups of 20. Group 1 was a control group that was etched and bonded in the usual manner. Group 2 was immersed in a carbamide peroxide home bleaching agent for 72 hours before pumicing and bonding. Group 3 was also bleached for 72 hours but was immersed in distilled water for 1 week before bonding. The results indicated that recently bleached teeth have significantly reduced bond strength values when compared with both groups 1 and 3. We suggest that if a patient is using a tooth whitening product, that they discontinue its use at least 1 week before the bonding of orthodontic attachments.
authors.affiliation: University of Pittsburgh, School of Dental Medicine, Pa.
authors.forename: P G
authors.initials: PG
authors.lastname: Miles
authors.forename: J P
authors.initials: JP
authors.lastname: Pontier
authors.forename: D
authors.initials: D
authors.lastname: Bahiraei
authors.forename: J
authors.initials: J
authors.lastname: Close
mesh_terms: D000134:Acid Etching, Dental; D000077463:Carbamide Peroxide; D002516:Ceramics / Q000737:chemistry*; D001840:Dental Bonding; D017005:Dental Debonding / Q000295:instrumentation; D003743:Dental Enamel / Q000187:drug effects / Q000648:ultrastructure; D004338:Drug Combinations; D004868:Equipment Failure; D006801:Humans; D008422:Materials Testing; D016910:Orthodontic Brackets; D010545:Peroxides / Q000737:chemistry* / Q000494:pharmacology; D010756:Phosphoric Acids / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D013499:Surface Properties; D013718:Tensile Strength; D014073:Tooth Bleaching; D014508:Urea / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology
chemical_list: D004338:Drug Combinations; D010545:Peroxides; D010756:Phosphoric Acids; D012117:Resins, Synthetic; D000077463:Carbamide Peroxide; D014508:Urea