A child's deciduous teeth are generally whiter than the adult teeth that follow. As a person ages the adult teeth often become darker due to changes in the mineral structure of the tooth, as the enamel becomes less porous. Teeth can also become stained by bacterial pigments, foods and tobacco. Certain antibiotic medications can also cause teeth stains or a reduction in the brilliance of the enamel. Family Dentistry of Texoma offers a variety of bleaching methods including take home trays, gel brushes, whiting pens and Zoom.