[Impairments in the ultrastructure and macro- and microelement composition of hard tooth tissues in caries in patients with hypothyroidism and in those without thyroid disease].

: Extracted teeth were studied in patients with hypothyroidism, by applying electron and atomic force microscopy. This method allows one to have extended morphometric characteristics. The patients with hypothyroidism were found to have superficial and internal changes in the enamel, dentin, and cement of intact and carious teeth. The macro- and microelement composition of teeth were investigated. In hypothyroidism, the resistance of dental tissue depends on the homogeneous structure of enamel and dentin.