The gum contains the lactobacillus anti-caries strain of bacteria, which is found in yogurt. It helps to prevent decay by keeping the streptococcus mutans strain of bacteria from adhering to teeth and eroding their surface, according to BASF scientists. Their findings are reported in the journal Chemistry & Industry.

Streptococcus mutans bacteria tend to accumulate on the surface of teeth, where they convert sugar into acids that break down tooth enamel, the researchers explain.

However, the Lactobacillus anti-caries baceteria contained in the chewing gum cause S. mutans to clump, thereby preventing them from sticking to teeth. The gum can reduce the S. mutans bacteria to one-fiftieth of its usual concentration, the research suggests.

.Although the new chewing gum may be helpful in reducing tooth decay, dentists are cautioning that brushing after meals, avoiding sugar, using fluoride and having regular dental checkups are necessary for oral health.