Abstract
Eighty-five children (age in 1981, 3-9 yr) examined in the 1981 survey in Ile-Ife, Nigeria, were seen again in 1986. In addition cross-sectional caries data in a small sample of 6-14-yr-olds were compared with data obtained in 1986. Results show that caries prevalence rate and the average number of DMFT increased slightly in the urban area, but was still very low. Both caries prevalence and the average number of DMFT decreased in rural areas because attrition proceeded faster than did caries.
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