Despite the fact that professional enamel lightening is a safe procedure, it can not be performed in all cases. Before the procedure, the dentist always conducts an examination to make sure there are no contraindications.
The procedure is usually not performed in cases of:
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active caries, gum inflammation, and other diseases of the oral cavity;
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increased tooth sensitivity until the moment its cause is eliminated;
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allergy to the components of the gel.
During pregnancy and during the period of breastfeeding, whitening is also not recommended, since there is not a sufficient number of studies regarding its safety for the mother and child. In addition, the procedure is not performed for children and teenagers until the completion of the formation of the permanent bite.
If veneers, crowns, or large fillings are installed in the smile zone, the procedure may be inappropriate. This is related to the fact that artificial restorations do not change their color, so it will not be possible to achieve an even shade of the smile.