Would i continiously have to buy Clever White whitening trays for my teeth to stay white?
Answers:
I don't know anything about that particuliar brand, but in order to keep the white, you do have to redo the treatment periodically, or use some sort of maintainence treatment.
I have used two over-the-counter tray systems, and hated both. The gel overflows the tray, and in my case it burned my gums (it's pretty common). I'd use Crest White Strips instead; your dentist can sell you the super-duper ones if you have significant staining, or the regular ones are at the store.
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