Prevalence of dental caries in permanent teeth of white and black schoolchildren in Brazil

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Abstract
The authors studied the prevalence of dental caries in white and black schoolchildren of Piracicaba, State of São Paulo, Brazil. The Student t-test, applied to the coefficient of prevalence of caries, revealed means significantly greater at the 5% level in whites than in blacks in the following groups: 7 years, both sexes; 8 years, both sexes; 9 years, males; 10 years, both sexes; 11 years, males.