Abstract
Clinical observation of schoolchildren from rural areas of Zambia, having no previous dental experience, showed an apparent difference in caries susceptibility of first and second permanent molars. A study of two groups, group A aged 11–13 years and group B aged 14–16 years, showed this difference to be statistically significant and geographically constant despite dietary differences. It was considered that the state of nourishment during the years of calcification could be a causative factor in the greater caries susceptibility of the second permanent molars.
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