Before teeth develop cavities,. they show the initiated some telltale signs that things are about to go wrong. These are white splotches on the tooth surface, especially occurring on tooth surfaces that are used while biting or chewing and are coming into contact with foods on a regular basis. They can often be seen after orthodontic treatment is finished and the braces come off, and many times the wall of the tooth becomes brittle and raised, and whiter than usual. The wall may also appear thinner. These white spots are white spot lesions, or demineralized zones. They are pre-cavities, if you will, and they show you that something is going wrong with that particular area.