Yes teeth whitening /bleaching creates slight sensation to hot n cold in somecases.
Lasting time depends on your feeding habitsi.e. how much stained foods you consume. Usually last for a year
Hello
Teeth whitening has no harmful action on your teeth. It depends upon how well you maintain it and what's your diet. So depending upon the care and other related factors it would vary for the duration!
I got my braces removed a few days ago, but my teeth are still not completely aligned. There is a 2–
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