From GM spray could keep dentist at bay:
A single dental treatment that involves spraying genetically-modified bacteria into a patient’s mouth could cut the risk of cavities by up to 90 per cent, according to new research. The spray, which could be on the market in as little as three years and should last a lifetime, contains bacteria similar to that found naturally in the mouth — with one crucial difference.The natural bacteria, streptococcus mutans, produces lactic acid that eats away at teeth, causing decay, whereas the GM bacteria does not.