As the strips sit on your teeth, the ingredients penetrate enamel to brighten it. Whitening trays work similarly to strips, but you bite into them rather than adhere them to the front of teeth.

Perhaps Boltaron’s most eyecatching innovation in numbers terms is a new lighter plastic that the company’s AIX stand proclaims as “ideal for tray tables”, Boltaron 4380, certified for FAR 25.853 (a), ...

Dentists I’ve spoken to as the Strategist’s dental-hygiene writer have told ... and bit down on the impression tray for about two minutes. Then I let it cool for about 30 minutes.