Cavities are irreversible and only get worse with time so if you are going to use a flouride-free toothpaste, limit it to once a week and if you experience any burning or tingling sensations then stop immediately and rinse your mouth out with water.' 'Paint-on teeth whitening pens are very commonly used to treat individual teeth that you might feel need to be whiter. This process may work but due to the small percentage of hydrogen peroxide in the solution, the effect will be minimal.
You may experience some mild gum irritation and tooth sensitivity, however as these pens should not exceed the 6% of hydrogen peroxide legally available in the EU and are usually much lower. As a result this also means that you probably will not see much improvement in the colour either so my advice is to steer clear except for the occasional quick fix.
' 'Oil pulling to whiten teeth and improve overall
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