[The physicochemical aspects of ion transport across dental enamel]

Passive transport of K+, Na+ Ca2+, Cl-, and F- ions through dental enamel was studied with due consideration for its porous structure. Pore size was studied by low-temperature nitrogen adsorption. The size of pores allows penetration of large molecules and ions through the enamel. The internal medium of a tooth is connected with the electrolyte solutions surrounding it due to porous structure of the medium.