As part of a nationwide dental survey in 1986 a caries study was executed in 3526 adults, aged 15-74 yr, living in 40 residential areas in The Netherlands. Marked differences were found between the social classes distinguished (more edentates in the lower classes) and between the different regions. It is supposed that these differences reflect the lack of dental manpower in the past.
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Kalsbeek et al. (1991) studied this question.
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