1. Chlorhexidine does not improve but preserves bond strength to eroded dentin.
- Author
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Francisconi-dos-Rios LF, Calabria MP, Casas-Apayco LC, Honório HM, Carrilho MR, Pereira JC, and Wang L
- Subjects
- Acid Etching, Dental methods, Carbonated Beverages adverse effects, Chlorhexidine chemistry, Composite Resins chemistry, Dental Cements chemistry, Dental Stress Analysis instrumentation, Humans, Materials Testing, Stress, Mechanical, Surface Properties, Tensile Strength, Time Factors, Chlorhexidine analogs & derivatives, Dental Bonding, Dentin ultrastructure, Dentin-Bonding Agents chemistry, Tooth Erosion pathology
- Abstract
Purpose: 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.
- Published
- 2015