Professional teeth whitening is safe, effective and easy to use. Two short appointments are all that are needed to get the process started. Note that fillings, bonding, veneers, crowns, bridges and dentures do not whiten. A dental examination must have been performed in the last 6 months and there can be no active, unrestored cavities present. Itâ€™s best to have teeth cleaned prior to whitening. If you plan significant fillings or veneers on front teeth it is best to whiten before. More about teeth whitening, click here.