[How can the largest possible number of people be reached by a prophylaxis program in a country with a scattered...

Two prophylactic programs are described suited to Icelandic conditions: a basic program for the majority of children and youth, and an additional program for individuals who have unusually high caries activities, -called the risk-group. The basic program consists of a) information distributed to groups on diets, including a restricted use of carbohydrates, b) instructions in dental hygiene, c) regular use of fluoride in the form of mouth-wash or tooth-brushing with a fluoride-solution. The additional program aims at individual motivation, explanation of cause and effect and intensive fluorideutilization.