" as we apply this to all teenagers , it allowed students to predict what wouldn be their future caries historia - the number of cysts that they ' ll know by , say , their latter 20s or earliest 30s , " says researcher john denny . described the caries assessment and impact evaluation ( pe ) trial , the measure measures the absolute proportions in saliva of different types of sugar compounds termed oligosaccharides . the same sugar chains are present on tooth surfaces .
A test can predict cavities.