In vitro evaluation of NaF and APF-gel application on surface microhardness of enamel in children of low, optimum and high fluoride areas
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An in vitro study was conducted on 78 sound human pre-molars collected from low (0.24 ppmF), optimum (0.7 ppmF) and known endemic fluoride areas (> 1.5 ppmF), to study the effects of topical application of sodium fluoride and APF-gel on surface microhardness o... ...
