[Characteristics of the enamel mineralization of the intact permanent teeth in children 6 to 14 years old]. / Osobennosti mineralizatsii émali postoiannykh intaktnykh zubov u detei v vozraste 6--14 let.

The composition of enamel from the first permanent lower molars was studied intravitally in 140 somatically asymptomatic children with intact teeth. The contents of Ca, P and molar Ca/P ratio were determined. At the age of 10, 13 and 14 years Ca levels were higher as related to 10, 13 and 14 for cuspid and to 13 and 14 years for paracervical specimen. After 10 years, cuspid Ca content was higher than cervical. At the age of 10 to 14 cuspid P content was reduced. Age-related increase in molar Ca/P ratio was also found. The values attained those characteristic of adult intact enamel at cuspid by the age of 9, and at cervix by 12 years. The data suggest that cuspid enamel matures earlier than pericervical one.