Should I Sleep Wearing The Trays? How Long Should I Wear It?
In general, the teeth whitening trays should be worn for between 30 minutes and 2 hours twice a day. While others can worn all night, it is depending on the strength of gels used. However, the strength of gels you choose depends on your tolerance to the Peroxide. If you are not experiencing any sensitivity you may wear the trays for at least 1 to 2 hours. If you sensitivity, decrease the use of it to half of the recommended duration. For example, wear it for 30 minutes instead of 60 minutes.
Teeth whitening systems use hydrogen peroxide, carbamide peroxide or urea peroxide as the whitening ingredient. The more peroxide, the greater the whitening power. A weak solution used overnight for seven days will produce the same results as a strong solution used for an hour for seven days.
However, it is important to follow the instructions on the product and pay attention to any precautionary statements. You should not use the product for more than 14 days without supervision by a dental professional.