Although aging and lifestyle choices can stain and discolor teeth, a tooth-whitening procedure can last a long time with the right at-home care and preventive measures. Smoking and drinking certain alcoholic beverages can stain teeth, so you may wish to limit your exposure.
Foods that stick to the teeth may stain by remaining in contact with the tooth surface for a longer period of time before brushing. Dark beverages, such as juice, coffee, and tea, can also stain the teeth if they come in contact with tooth surfaces on a regular basis.
After your whitening, your dental care provider will give you specific instructions on how to keep your teeth looking their best. You can use a straw when drinking to reduce surface contact, and be sure to brush twice each day.