Effects of Flow Rate and pH on Calcium Phosphate Saturation in Human Parotid Saliva
- 1 January 1983
- journal article
- research article
- Published by S. Karger AG in Caries Research
- Vol. 17 (5) , 403-411
- https://doi.org/10.1159/000260694
Abstract
Human parotid saliva collected at flow rates ranging from 0.1-2.0 ml/min was analyzed for ionized Ca and Pi concentrations, pH and total ionic strength. Calculations showed that the saliva was supersaturated with respect to hydroxyapatite (HAP) and .beta.-tricalcium phosphate (TCP) and unsaturated with respect to dicalcium phosphate dihydrate (DCPD) at all flow rates. At flow rates higher than 0.2 ml/min the saliva was also supersaturated with respect to octacalcium phosphate (OCP). After varying the pH level within the range 5.0-8.0, the saliva was just saturated or unsaturated with respect to DCPD at all levels. At pH values lower than 5.5, 6.4 and 6.9, the saliva became unsaturated with respect to HAP, TCP and OCP, respectively.Keywords
This publication has 10 references indexed in Scilit:
- Determination of Inorganic Phosphate in Human Parotid Saliva by the Malachite Green MethodCaries Research, 1982
- Determination of ionized calcium in parotid salivaClinica Chimica Acta; International Journal of Clinical Chemistry, 1980
- The relationship between calcium and phosphorus concentrations of human saliva and dental plaqueArchives of Oral Biology, 1978
- Precipitation of hydroxyapatite from dilute solutions upon seedingCalcified Tissue International, 1977
- Inhibition of calcium phosphate precipitation by human salivary secretionsArchives of Oral Biology, 1976
- Solubility of -Ca3(PO4)2 in the system Ca(OH)2-H3PO4-H2O at 5, 15, 25, and 37 CJournal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1974
- Solubility of CaHPO4 2H2O in the system Ca(OH)2-H3PO4-H2O at 5, 15, 25, and 37.5 CJournal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1970
- Mechanisms of calcification: role of collagen, polyphosphates, and phosphataseAmerican Journal of Physiology-Legacy Content, 1961
- First dissociation constant of phosphoric acid from 0-degrees-C to 60-degrees-C; Limitations of the electromotive force method for moderately strong acidsJournal of Research of the National Bureau of Standards, 1951
- ph of aqueous mixtures of potassium dihydrogen phosphate and disodium hydrogen phosphate at 0 degrees to 60 degrees CJournal of Research of the National Bureau of Standards, 1945