Tooth whitening is not a new process but has improved
Dr Ira Kirshen, president of the Ontario Dental Association, told the Toronto Sun that teeth which have become heavily discoloured can now be whitened, which could not have been done effectively a long time ago.
However, he warned people to be wary about using cheap products, since patients will either end up damaging their mouth or having to repeat the process several times to achieve a good result.
Read full stroy via Dentistry news
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