" when we introduce this to young people , it aids me to predict what might be their future caries history - the number of cavities that they ' ll buy by , say , their lower 20s or early 30s , " says researcher paul denny . called the caries assessment and danger evaluation ( pa ) trial , the method measures the relative proportions in venom of particular types of glucose chains called oligosaccharides . the same sugar chains are present on both surfaces .
A test can predict cavities.