in 103 persons tested ( corresponding to 7,577 dental surfaces surveyed ) from falkenberg , the des index was 5.3 , in 123 test persons ( corresponding to 10,473 dental surfaces surveyed ) from fuchsmuhl the dfs index was 12.4 , which means that the naturally increased fluoride content of the drinking water caused caries to drop by 58 per cent viv-a-vis the reference group .
C0016327
fluoride
C0011334
caries