EFFECT OF A FLUORIDE VARNISH ON THE ENAMEL DEMINERALIZATION

The aim of this study was to evaluate the effect of fluoride varnish application on enamel decalcification. Eighty bovine enamel blocks divided randomly into 4 groups. Group I is the control group. Group II was treated with the APF gel and washed after 4 minutes. Group III and IV was treated with Fluor and and washed after 1 minutes. Decalcification were created by placing all specimen into artificial acidic solution(pH 4.0). Then the optical density of the lesions were measured by visible light fluorescence and the lesion depths were measured. The results were : 1. The optical density of group II was higher than group I but lower than group III, IV(p0.05) at 48 hours. 2. The optical density of group IV was highest at 72 hours(p and in group I, II but no significant difference between two groups(p>0.05). 4. Mean lesion depths were and in group III, IV but no significant difference between two groups(p>0.05). Fluoride varnish treatment resulted in a significant reduction in lesion depth compared with APF gel. Fluor and provided the similar effect.