The affinity of some bacterial polysaccharides for hydroxyapatite was
investigated. Water insoluble polysaccharide production by bacteria was inhibited
by the presence of NaF in the growth medium, while the water soluble fraction was
unaffected. The adsorption of the bacterial polysaccharide on hydroxyapatite
decreased with decreasing levels of the water insoluble fraction. It is suggested
that NaF can inhibit bacterial attachment and caries by interfering with bacterial
attachment through reducing the production of water insoluble
polysaccharide.
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