Scientists create candy that's good for teethPosted on
(Medical Xpress)—Dentists warn us that too many sweets can cause cavities. In fact, it's not candy, but bacteria on the tooth surface that cause tooth decay. If you reduce the amount of cavity-causing bacteria, the number of cavities should decrease. Christine Lang of the Berlin biotech firm ORGANOBALANCE and her colleagues have developed a candy that can do this. This candy contains dead bacteria that bind to the bacteria most likely to cause cavities. Subjects who ate the candy had reduced levels of "bad" bacteria in their mouths. The research appears in Probiotics and Antimicrobial Proteins.
After you eat, bacteria attached to the surface of your teeth release acid. Slowly, this acid dissolves your tooth enamel. As the enamel wears down, cavities can develop. The strain of bacteria most likely to cause cavities is mutans streptococci. When you chew, you shed mutans streptococci into your saliva. Swallowing or spitting removes some of the bacteria from your mouth after you finish chewing. The remaining bacteria reattach themselves to your teeth.
The researchers knew that another type of bacteria, Lactobacillus paracasei, found in kefir, reduces levels of mutans streptococci and decreases the number of cavities in rats. A sugar on the surface of L. paracaseibinds with mutans streptococci. Lang and her team think that by binding with mutans streptococci, L. paracasei prevents mutans streptococci from reattaching to teeth.
To test whether L. paracasei could help prevent cavities in people, Lang and her team developed a sugar-free candy containing heat-killed samples of the bacteria. They then tested the candy on a group of 60 volunteers. One third ate candies with one milligram of L. paracasei, one third ate candies with two milligrams and one third ate candies that tasted the same, but contained no bacteria.
Each of the subjects ate five candies over a one and half day period. At the end of the experiment, about three fourths of the volunteers who'd eaten candies with bacteria had significantly lower levels of mutans streptococci in their saliva than they'd had the day before. Subjects who consumed candies with two milligrams of bacteria experienced a reduction in mutans streptococci levels after eating the first candy.
The researchers point out that they by using dead bacteria, they were able to avoid problems live bacteria might have caused. Killing the L. paracasei does not destroy the sugar that binds with mutans streptococci. L. paracasei does not bind with beneficial oral bacteria. This makes it a better choice for cavity prevention than other probiotics.
[Article via Medical Xpress]
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