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Dentists diagnose, prevent, and treat problems of the teeth and tissues of the mouth.
They remove decay and fill cavities, examine x-rays, place protective plastic sealants on children's teeth, straighten teeth, and repair fractured teeth. They also perform corrective surgery of the gums and supporting bones to treat gum diseases. Dentists extract teeth and make molds and measurements for dentures to replace missing teeth. Dentists provide instruction in diet, brushing, flossing, the use of fluorides, and other aspects of dental care, as well. They also administer anesthetics and write prescriptions for antibiotics and other medications.