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INTERACTION OF HYDROXYAPATITE AND PROTEIN‐COATED HYDROXYAPATITE WITH STREPTOCOCCUS MUTANS AND STREPTOCOCCUS SANGUIS
Author(s) -
RÖLLA GUNNAR,
ROBRISH STANLEY A.,
BOWEN WILLIAM H.
Publication year - 1977
Publication title -
acta pathologica microbiologica scandinavica section b microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.909
H-Index - 88
eISSN - 1600-0463
pISSN - 0304-131X
DOI - 10.1111/j.1699-0463.1977.tb01985.x
Subject(s) - streptococcus mutans , apatite , saliva , chemistry , adsorption , bacteria , phosphate , microbiology and biotechnology , streptococcus , biofilm , in vitro , calcium , biochemistry , nuclear chemistry , mineralogy , biology , organic chemistry , genetics
The present study showed that S. mutans and S. sanguis behaved like negatively‐charged par‐ ticles in their interaction with hydroxyapatite in vitro. Phosphate in the system inhibited bacterial uptake by apatite, whereas calcium increased the uptake. A layer of acidic protein inhibited the uptake of bacteria by hydroxyapatite. The opposite was true when a basic protein was first adsorbed to the apatite. A saliva film on the apatite decreased the uptake of bacteria, supporting the view that acidic proteins are selectively adsorbed by hydroxyapatite from saliva. The results indicate clearly that electrostatic forces may be involved in bacterial interaction with tooth surfaces.