[Comparative radiological studies on the incidence of primary caries in treated vital and devitalized teeth]

The non-filled proximal areas of 709 vital and devital teeth with metal fillings were examined radiologically for primary caries. The findings were almost identical (Table 2). The somewhat higher prevalence of primary caries in vital teeth (Table 1) may be explained by the more drastic removal of predilection sites in devital teeth, which is due to the necessarily more extended cavity preparation.