The aim was to establish if there is a correlation between the rate of formation of
supragingival calculus and the degree of supersaturation of saliva with respect to apatite,
brushite and other calcium phosphates. The rate of calculus formation was estimated by
measuring the calculus formed on lingual surfaces of the lower incisors in 15 individuals
during 30 days. Submandibular saliva stimulated with citric acid and resting whole saliva,
after pH determination and ultrafiltration to remove protein, was analysed for calcium …