The prevalence of oral malodor shows an increasing trend but treatment methods have been limited to the improvement of oral hygiene involving the physical removal of biofilms by brushing the teeth and the tongue or chemical methods involving mouth wash (Broek, Feenstra, & Baat, 2007 ).
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Inhibitory effect of Streptococcus salivarius K12 and M18 on halitosis in vitro.
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