Self-Care Strategies

Bleaching considerations

Bleaching agents can potentially cause or increase dentin sensitivity.80 An average of 25% of those who bleach their teeth develop hypersensitivity.81 Improper use of tray-applied bleaching agents can erode enamel and dentin, a risk factor for the development of hypersensitivity.

It has been suggested that protecting dentinal tubules (as with fluoride) prior to bleaching is not appropriate because bleaching is effective when it penetrates into dentin tubules to decolorize (oxidize) the nonfunctional staining proteins and materials present.80 Recommendations to reduce sensitivity resulting from bleaching include using a desensitizing dentifrice that contains potassium nitrate or a more concentrated application using a tray delivery method, and reducing bleaching time and using fluoride after bleaching.83,84 In addition, a lower concentration of carbamide peroxide (10 to 15%) can be used for bleaching. Although it may take longer to achieve the same level of whiteness as higher concentrations, it could reduce the incidence of sensitivity.85 The majority of hypersensitivity that arises from bleaching dissipates within a few weeks. Those with existing dentin hypersensitivity are cautioned against bleaching until the condition has been resolved.