title: Bacterial adherence to bleached surfaces of composite resin in vitro.
abstract: OBJECTIVE
  The effect of bleaching agents on bacterial adherence to polished surfaces of composite resin restorations was assessed in vitro.
  
  
  METHODS
  Samples of light-curing composite resins were treated with either 10% carbamide peroxide or 10% hydrogen peroxide for 1, 3, or 7 days. Bacterial adherence of Streptococcus mutans, Streptococcus sobrinus, and Actinomyces viscosus to the treated resin samples was analyzed and compared with adherence to nonbleached controls.
  
  
  RESULTS
  A 10% solution of carbamide peroxide caused a significant increase in surface adherence of Streptococcus mutans and Streptococcus sobrinus after 3 days (P < .01). A 10% solution of hydrogen peroxide caused a significant increase in surface adherence of Streptococcus mutans and Streptococcus sobrinus after 3 and 7 days (P < .01). A decrease in adherence of Actinomyces viscosus was found after treatment with 10% hydrogen peroxide for 7 days (P < .05).
  
  
  CONCLUSIONS
  It appears that bleaching agents may affect adherence of certain cariogenic microorganisms to the outer surfaces of composite resin restorations.
authors.affiliation: Department of Endodontics, Hebrew University-Hadassah Faculty of Dental Medicine, Jerusalem, Israel.
authors.forename: C
authors.initials: C
authors.lastname: Mor
authors.forename: D
authors.initials: D
authors.lastname: Steinberg
authors.forename: H
authors.initials: H
authors.lastname: Dogan
authors.forename: I
authors.initials: I
authors.lastname: Rotstein
mesh_terms: D016924:Actinomyces viscosus / Q000187:drug effects / Q000502:physiology; D001422:Bacterial Adhesion / Q000187:drug effects*; D000077463:Carbamide Peroxide; D003188:Composite Resins; D004338:Drug Combinations; D006244:Hardness; D006861:Hydrogen Peroxide / Q000494:pharmacology; D010545:Peroxides / Q000494:pharmacology*; D018709:Statistics, Nonparametric; D013295:Streptococcus mutans / Q000187:drug effects / Q000502:physiology; D016986:Streptococcus sobrinus / Q000187:drug effects / Q000502:physiology; D013499:Surface Properties; D014073:Tooth Bleaching / Q000009:adverse effects*; D014508:Urea / Q000031:analogs & derivatives / Q000494:pharmacology
chemical_list: D003188:Composite Resins; D004338:Drug Combinations; D010545:Peroxides; C100748:Polofil Molar; D000077463:Carbamide Peroxide; D014508:Urea; D006861:Hydrogen Peroxide