Some superficial tooth stains that do not come off with a professional cleaning may sometimes be removed through a process called “Enamel Microabrasion”. A dilute solution of hydrochloric acid is rubbed on the tooth surface for a few minutes. This removes a little bit of the superficial tooth structure which is the discolored part. The effects of this tooth stain removal treatment will continue to work for up to 2 weeks post-operatively. Enamel Microabrasion is accomplished comfortably without anesthesia. For a short period of time after treatment, the teeth may feel a little rough, and you may feel some minor sensitivity. These sensations, if they occur at all, will go away in a few days. Stains that are deeper than 0.5mm will not come out completely, and therefore, will require that a tooth colored filling be placed.