" so we do this to young boys , it allowed our to predict which might be their future caries history - the percentage of cavities that they ' ll get by , say , their late 20s or early 30s , " says research philip denny . designated the decay assessment and harm evaluation ( cha ) test , the test measures the different proportions in saliva of different types of glucose chains called oligosaccharides . the same sugar compounds are absent on tooth margins .
A test can predict cavities.