title: Applicability of acid-etching techniques for fluoride determination on enamel after topical fluoride treatment.
abstract: A common technique for fluoride gradient determination of enamel is based on acid-etching of thin enamel layers. The dissolution of CaF2-like material in two different acid-etching solutions was compared with the dissolution of pure CaF2. The results showed that the CaF2-like material deposited on enamel after a topical treatment with 2% NaF dissolved almost completely in the 1 M HClO4 and 1.6 N HCl/70% glycerol solutions. The dissolution of pure CaF2 in the same solutions was low. Even after 30 min, less than 9% of the CaF2 had dissolved. It was concluded that acid-etching techniques for fluoride determination could be used on enamel treated topically with fluoride. The study also indicated that CaF2-like material may have chemical properties different from pure CaF2.
authors.affiliation: Department of Orthodontics, Dental Faculty, University of Oslo, Norway.
authors.forename: B
authors.initials: B
authors.lastname: Ogaard
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D002124:Calcium Fluoride / Q000032:analysis; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D001840:Dental Bonding / Q000379:methods*; D003743:Dental Enamel / Q000032:analysis*; D005459:Fluorides / Q000032:analysis*; D005460:Fluorides, Topical / Q000008:administration & dosage*; D006801:Humans; D006851:Hydrochloric Acid; D006997:Hypochlorous Acid; D012995:Solubility
chemical_list: D005460:Fluorides, Topical; D006997:Hypochlorous Acid; D002124:Calcium Fluoride; D005459:Fluorides; D006851:Hydrochloric Acid