" when we apply this to young children , it allows we to estimate what possible be their future pfoa period - the number of pores that they ' ll be by , like , their late 20s or early 30s , " asks researcher paul denny . called the caries assessment and risk evaluation ( care ) trial , the examination measures the relative proportions in saliva of different types of sugar bonds called oligosaccharides . the same sugar chains are present on tooth surfaces .
A test can predict cavities.