Comparative assessment of the rate and quality of enamel mineral component maturation of human teeth with connective tissue dysplasia in the early postpartum period

Abstract

Objective. It is necessary to study the human enamel prisms size at different periods of postpartum ontogenesis in connective tissue dysplasia by atomic force microscopy. Materials and methods. The study involved 150 males divided into a group with and without connective tissue dysplasia (each additionally by age: 15—20, 21—30, 31—40 years). Each examined was removed one of the low wisdom teeth (3.8 or 4.8 by ISO). Prepared thin sections of human tooth enamel samples up to grade 14, with maximum preservation of the edges of the enamel prisms within the surface layer. The Image Analysis NT-VDT software was used to analyze the number of faces, shape, length, and width of enamel prisms. Results. It was found that at 15—30 years old there is an ordered structure of enamel prisms, a large number of 5-sided forms (50—60%). A permanent form of enamel prisms at 31—40 years old, where the share of 6-sided figures is 30%. With CTD, the growth rate on the plane, which increases the width of the prism, is very similar to the growth rate of length up to 30 years, which leads to a violation of their spatial configuration relative to the organic matrix. Conclusions. The maturation of human enamel is strictly individual, depending on the connective tissue dysplasia, which has a negative effect on the rate of maturation, and after eruption can lead to pathological conditions of hard dental tissues.