remineralization effect of topical novamin versus sodium fluoride (1.1%) on caries-like lesions in permanent teeth.

novamin, a synthetic mineral composed of calcium, sodium, phosphorous and silica releases deposits of crystalline hydroxyl-carbonate apatite (hca) structurally similar to tooth mineral composition. the aim of this investigation was to compare the potential remineralization effect of topical novamin and sodium fluoride gel on caries like lesions in permanent teeth.a total of 60 sound human freshly extracted teeth were subjected to a ph-cycling protocol. specimens were randomly assigned to one of the two treatment groups with novamin contained dentifrice applied to group 1, while group 2 received a dentifrice containing 1.1% neutral sodium fluoride. pastes were applied five times after the samples received a demineralization from an earlier cariogenic challenge. specimens were then evaluated by a surface micro hardness test (smh, 25g, 5s). post-treatment smh measurements were conducted and mann whitney test was employed for statistical analysis.mean post lesion smh values were 221.99±26.27 and 224.50±28.64 for the first and second groups, respectively. post treatment smh values were 232.52±24.34 for novamin and 232.03 ±24.46 for the fluoride group. two way anova test showed a highly significant difference between the two different treatment protocols (p<0.001).novamin dentifrice appears to have a greater effect on remineralization of carious-like lesions when compared to that of fluoride containing dentifrice in permanent teeth.