There is an exception to the rule that existing dental work will not lighten and this exception involves teeth with porcelain veneers. Veneers are translucent shells of porcelain which have been bonded onto the front side of a person's teeth. While the tooth bleaching agent will not change the color of the veneer itself it will be able to permeate the tooth from the backside, thus lightening the tooth structure which lies under the veneer. Because veneers are translucent, the net effect can be that the tooth, from the front side, appears whiter. Teeth with gum recession.
Some persons have gum recession on one or more teeth.
Usually the root surface which becomes visible as gums recede has an appearance which is somewhat darker than the rest of the tooth. The at home teeth whitening method won't effectively lighten dentin. Bookmark this page for future reference. Inc. All rights reserved.