Professional teeth whitening procedure is performed with the help of peroxide in combination with sources like heat and light to intensify and speed up the procedure.
More than one appointment may be required to produce results in heavily stained and discolored teeth. However, you can expect dramatic results by time.
Laser Bleaching uses laser energy to activate chemicals in the bleaching gel hence ensuring a faster and effective result.
There will be no harm from bleaching procedure as they only remove stains and lighten the teeth color by penetrating through the enamel tubules.