Some special features of the caries preventive effect of water-fluoridation.

摘要: Abstract In March 1953 water-fluoridation was started in Tiel, the Netherlands. From caries numbers of three age classes differences inhibition for various teeth and tooth surfaces are shown after 5 1 2 years fluoridation. The free smooth (buccal labial) show an important reduction even if fluoridation some eruption tooth. If is or 3 before hardly any greater. Some proximal a reasonable shortly eruption. degree protection seems partly determined by accessibility surface fluoride ions condition interproximal space. A pre-eruptive period with fluoridated drinking-water increases effect substantially. For occlusal surface, only insignificant found 2–3 still about 50 per cent smaller than surfaces. Only those premolars second molars which at start were early stage development, larger found. to be correlated fluorine can built absorbed enamel these will depend upon methods used examination. general, percentages tend higher diagnosed more advanced stage.