In 1975 caries epidemiologic investigations were performed in 1,017 preschoolchildren of Baja, aged 3--6 years. The data were analyzed and compared with those of 620 preschoolchildren of the same city in 1955. A mean increase of 10.9% of the caries frequency (percentage of examinees with caries), and a mean increase of 43.5% of the caries intensity(dmft count per examinee) could be observed in spite of a better vitamin D prophylaxis. The possible cariogenic role of the increased surgar consumption (37.5 kg from 24.4 kg per individual during 20 years) is discussed.
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Bruszt et al. (1977) studied this question.