Prior to teeth whitening, it’s important to ensure that the teeth and gums are in good dental shape. Your dentist will also alert you to any possible issues that may occur as a result of the teeth whitening procedure, such as current tooth-colored fillings that will not whiten during the procedure and will remain yellow and be more visible afterward.

Furthermore, cavities can make teeth more susceptible to whitening and should be treated by your dentist prior to whitening. Also, not everyone is a suitable candidate for teeth whitening; due to the chemicals used, women who are pregnant or lactating should avoid it, and those with sensitive teeth or allergies to peroxide should avoid it.