Results from this study illustrated a significant correlation between caries experience in the primary and that in the permanent teeth. A greater correlation coefficient was found between caries in primary maxillary anterior teeth and caries in permanent molars .Of the children who developed dental caries in permanent teeth, 94% of them experienced caries in their primary teeth .of the children who did not have any caries in their primary teeth, 83% remained caries-free by the age of 12. A relative risk value of 2.6 indicated that children who manifested caries in their primary teeth were three times more likely to develop caries in their permanent teeth than were those children previously free of caries. The study also revealed that the mean decay in the permanent teeth significantly correlated with the mean decay in the primary teeth.