The same study, published in 2012 by the Centre for Advanced Research in Public Health in Spain, showed that some of these people also had a species that can kill Streptococcus mutans. Researchers have found that some lucky people have an oral microbiota that reduces the acidity in the mouth - by digesting food components and producing acid neutralisers such as ammonia (which is definitely not like the stuff you clean with), preventing cavities. Now we know it’s more complicated than that and that good ‘oral’ bacteria are key. Since the 1960s, dentists have thought the bacteria Streptococcus mutans was solely responsible for causing cavities. It’s plaque we brush away to prevent decay. Yet just like your gut and on your skin, your mouth is home to a vibrant - and important - community of bacteria and other microbes (known as the oral microbiota) that you actually want to encourageįor sure, some of these microbes are not so good - cavities are caused when ‘bad’ bacteria in your mouth form a sticky layer (plaque) on your teeth plaque loves sugar and produces acid, which then attacks tooth enamel. Oral bacteria sounds like something your dentist would tell you off about.
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