Table 1.

Compositions of experimental materials.

Group	Product (manufacturer)	Composition
N	Pleasia fluoride-free (Amorepacific, korea)	Main ingredient: sodium chloride Inactive ingredients: water, glycerin, sorbitol, hydrated silica, hydroxyethyl cellulose, cellulose gum, sodium lauryl sulfate, flavor
SC	Sensodyne original (Glaxo SmithKline, korea)	Active ingredient: 10% strontium chloride hexahydrate Inactive ingredients: water, glycerin, sorbitol, calcium carbonate, hydroxyethyl cellulose, silicon dioxide, flavor
TP	Vussen S (Osstem, korea)	Active ingredient: 19% Tricalcium phosphate Inactive ingredients: Water, sorbitol, hydrated silica, glycerin, cellulose gum, sodium lauryl sulfate, flavor