[Scanning electron microscopic study of fluorotic permanent teeth enamel]

The materia comprised 8 caries-free fluorotic permanent teeth (4 with severe and 4 with very mild fluorosis) and 4 caries-free non-fluorotic permanent teeth. The surface of teeth with severe fluorosis was mainly rought with discrete pitting and small parts of relative sound enamel. The subsurface enamel of teeth with severe fluorosis was with irregular cross-sectional shape of rod and more extensive inter-rod enamel spaces in comparison with other parts of enamel. The surface enamel of teeth with very mild fluorosis was mainly smooth, similar to the sound enamel, with small parts of rough enamel. In subsurface enamel of teeth with very mild fluorosis no difference was found between cross-sectional shape of rod and dimension of inter-rod enamel spaces in comparison with other parts of enamel.