The estimation of nanogram levels of fluoride in fractions of a milligram of tooth enamel by means of liver esterase.
D055598:Chemical Phenomena; D002621:Chemistry; D003743:Dental Enamel; D004794:Enzyme Repression; D004950:Esterases; D005459:Fluorides; D006801:Humans; D006882:Hydroxyapatites; D066298:In Vitro Techniques; D015040:Zirconium