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How to cope with teeth whitening sensitivity
Brush with a desensitizing toothpaste.
At least 10 days before your treatment, start brushing three times a day with a desensitizing toothpaste. Sensodyne and colgate sensitive are two good options.
These toothpastes help to block pain signals from the tooth surface to the inner nerve. Look for gc tooth mousse, which has an active ingredient called cpp acp that works very well to remineralize enamel.