title: Chlorhexidine does not improve but preserves bond strength to eroded dentin.
abstract: OBJECTIVE
  To evaluate the effect of aqueous solutions of chlorhexidine digluconate (CHX) in different concentrations on bond strength to eroded dentin up to 6 months, using normal dentin as a control.
  
  
  METHODS
  Exposed flat dentin of extracted third molars was only ground with 600-grit SiC paper/1 minute (normal dentin - N), or subsequently eroded by a regular-cola soft-drink (eroded dentin - E). N and E were acid-etched, washed, dried and rehydrated with 1.5 μL, respectively, of distillated water (control - NC / EC); of 0.004% CHX (N0.004% / E0.004%); or of 2% CHX (N2% / E2%). Adper Single Bond 2 was applied in all specimens and resin composite buildups were constructed with Filtek Z350. Specimens were sectioned in beams, which were tested (μTBS) immediately or after 6 months of aging.
  
  
  RESULTS
  Microtensile bond strength to eroded dentin was always significantly lower than that to normal dentin. Application of tested CHX solutions did not exert a significant effect immediately; however, after aging, the 2% CHX prevented abrupt bond strength loss both to eroded and normal dentin.
authors: Luciana Fávaro
authors: LF
authors: Francisconi-dos-Rios
authors: Marcela Pagani
authors: MP
authors: Calabria
authors: Leslie Caroll
authors: LC
authors: Casas-Apayco
authors: Heitor Marques
authors: HM
authors: Honório
authors: Marcela Rocha De Oliveira
authors: MR
authors: Carrilho
authors: José Carlos
authors: JC
authors: Pereira
authors: Linda
authors: L
authors: Wang
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D002253:Carbonated Beverages / Q000009:adverse effects; D002710:Chlorhexidine / Q000031:analogs & derivatives* / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D013997:Time Factors; D014077:Tooth Erosion / Q000473:pathology*
chemical_list: C554641:Adper single bond 2; D003188:Composite Resins; D003738:Dental Cements; D017220:Dentin-Bonding Agents; C474035:Filtek Supreme; C010882:chlorhexidine gluconate; D002710:Chlorhexidine