Teeth discoloration may occur because of staining agents in our diet- e.g. tea, coffee, red wine, etc. or habits- e.g. smoking. These sort of stains are outside of the tooth shell and can be removed by your Dentist or Hygienist.
Teeth may also be stained from a natural discoloration, or following trauma. This type of stain is inside the tooth structure itself and can only be removed or lightened by professional tooth whitening. Tooth whitening is a very safe dental procedure resulting in a brighter natural smile.