The most common problems that come with age are cavities, particularly root caries (tooth roots), periodontal disease (gums), the loss of teeth, the functional changes of the oral cavity (chewing), tooth wear, oral cancer, xerostomia (dry mouth feel) and Cranium-facial pain. Other age-related changes are related to the appearance of mucous membranes thin and sensitive, change the color of teeth and decreased perception of certain flavors.