recent studies involving use of these procedures include the analysis of fluoride in : ( 1 ) plaque fluid samples from single sites before and after topical fluoride administration , ( 2 ) tooth mineral samples recovered by acid-etch or microdrill biopsy of enamel , and ( 3 ) fluid recovered from the interior of the tooth during simulation of the caries process .
C0016327
fluoride
C0011389
plaque