Another whitening option that will gain the best and fastest results is in-office whitening or power bleaching.
This is a procedure in the office where full-strength whitening gel is applied directly to the teeth for 15 minutes and repeated two to three times.
The results can be evident in 30 to 60 minutes. However, you might need to make several other follow-up appointments with your dentist.
How Long Do Whitening Effects Last?
This teeth whitening procedure is not a permanent solution to discoloration. When you expose your teeth to smoking, foods, and beverages that can cause staining, the enamel might fade away.
How long the whitening lasts varies with an individual. It depends on the procedure used, the type of food and beverage taken, staining level, and teeth type.
How to Prevent Staining
Avoid foods such as coffee, tea, red wine, and dark berries that can stain teeth. Avoid smoking and vaping.