BriteSmile, Zoom & Fluorescent EXpress White, In-Office One hour light activated whitening gels are stronger because the % of peroxide is higher, Which works a little faster. Please- keep in mind that some teeth are more difficult to bleach- than: others no matter what bleaching agent you use. The older you are and -the more gray your teeth are, the more difficult It is to bleach.
Some teeth will achieve only minor whitening improvement no matter what product you use. A - Simply due to the thickness of your enamel or to calcium deposits, The whitening- gel is able to penetrate and whiten the enamel quicker on thinner surfaces, This most often occurs an the tips: of the teeth where the enamel is thinner due to use.


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