The DMF index can be estimated at double the value observed in the exam of two hemiarchs (Upper Right and Lower Left), or at four times the value obtained from six teeth (First Molar and Central Incisor Upper Right, first bicuspid upper left, second molar and lateral incisor lower left and second bicuspid lower right. The estimates were made by the use of methods of descriptive statistics, averages, percentages and the coefficient of the prevalence of caries, in a sample of 100 people, aged from 18 to 25 years.