[Examination of the pH of saliva in children and juveniles in relation to caries, gingivitis and oral hygiene].

The pH rate of unstimulated fasting saliva in the morning in vivo and the following DMF/T, DMF/S, OH indexes and the PIe had been measured or ascertained in 70 subjects aged 10 to 17 years. The analyses stated that there does not exist a direct relationship between incidence of caries and the degree of inflammation of the gingiva and the concentration of saliva hydrogen ions as well. The pH rate of saliva is stated to be also a favourable factor for plaque formation.