[Oral streptococci affecting Ca-phosphate precipitation].
The precipitation of Ca-compounds in ageing dental plaque leads to the formation of calculus. Bacterial lipoteichoic acid (LTA) has been discussed as Ca-carrier in this process (Zoon et al., 1989). Therefore in this study, LTA was isolated from oral streptococci and tested for its influence on the precipitation of Ca-phosphate. LTA-containing bacteria, LTA-free bacteria and isolated LTA were added to the reaction mixtures for Ca-phosphate precipitation and the amount of precipitated mineral was measured. LTA-containing cells and, above all, LTA, inhibited Ca-phosphate precipitation in a distinct pH-range just above the acid solubility of the mineral by complexing Ca(2+)-ions. Experiments with Ca-fluoride in place of Ca-phosphate showed that LTA did not affect the precipitation of this mineral.
Bergmann
J E
JE
Klinik und Poliklinik für Zahn-, Mund- und Kieferkrankheiten der Universität Hamburg.
Gülzow
H J
HJ
Lewandowski
T
T
D002124:Calcium Fluoride / Q000378:metabolism; D002130:Calcium Phosphates / Q000378:metabolism*; D003728:Dental Calculus / Q000378:metabolism / Q000382:microbiology*; D003747:Dental Enamel Solubility; D003773:Dental Plaque / Q000382:microbiology; D006863:Hydrogen-Ion Concentration; D008070:Lipopolysaccharides / Q000378:metabolism*; D013295:Streptococcus mutans / Q000502:physiology*; D013682:Teichoic Acids / Q000378:metabolism*
D002130:Calcium Phosphates; D008070:Lipopolysaccharides; D013682:Teichoic Acids; C485828:alpha-tricalcium phosphate; C485830:tetracalcium phosphate; C009900:lipoteichoic acid; C485838:calcium phosphate, monobasic, anhydrous; C020243:calcium phosphate; C485829:calcium phosphate, dibasic, anhydrous; D002124:Calcium Fluoride
Oral Streptokokken beeinflussen die Fällung von Ca-Phosphat.