For more information about children's dental care, or for referrals, contact the following organizations: National Institute of Dental Research, NIH, 9000 Rockville Pike, Bldg. 31, Room 2C-35, Rockville, Md. 20892; 496-4261. Offers free brochures on plaque, fluoridation, tooth sealants, tetracycline-stained teeth, cleft lip and palate, and dental care for new mothers and babies (available in Spanish). American Dental Association, 211 E. Chicago Ave., Chicago, Ill. 60611; (312) 440-2500. Send 25 cents for a brochure on "Your Child's Teeth," covering oral hygiene, diet, dental development and mouth injuries in children from birth to 18 years old. American Association of Orthodontists, 460 North Lindbergh Blvd., St. Louis, Mo. 63141; (314) 993-1700. Write for free pamphlet on orthodontic care, explaining the causes of orthodontic problems and the types of treatment, as well as costs and insurance coverage.

Some local sources of information and referral: District of Columbia Dental Society, 686-0803. Southern Maryland Dental Society, 731-4525, serving Calvert, St. Mary's, Charles, Montgomery and Prince George's counties. Maryland State Dental Association, 800-492-3678, calls from Maryland only. Virginia Dental Society, 642-5297, from 9:30 a.m. to 12:30 p.m. After 12:30, an answering service gives instructions.

Other dental health organizations furnish literature directly to dentists; ask yours for more information.