Treatment results usually depend on the severity of the discolouration. Both vital (i.e. live) and non-vital teeth (e.g. root canal treated) can be bleached and may take several visits to complete.
Bleaching or tooth whitening is not effective on dental restorations such as amalgam or tooth-coloured fillings, metal or porcelain crowns, etc. People with worn tooth enamel, receding gums, sensitive teeth, untreated cavities, and heavily restored teeth should consult a dentist before undergoing any teeth whitening procedures.
Your dentist will be able to recommend the most ideal method of teeth whitening treatment after an in-office examination, when the cause and nature of your tooth discolouration can be established. Your dentist will also provide you with more information on the various types of whitening procedures available, their duration and frequency of treatment.
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