title: [Fluoride gels--local application with a tray or a toothbrush?].
abstract: Fluoride gels have been used since the 1960s. Most gels are recommended for use in mouth-trays. An alternative is the application on a toothbrush. The present study compared the fluoride concentration in surface enamel and its acid resistance following the application in a tray or on a toothbrush in vitro. In a first experiment 80 halves of molar crowns were used. In group A 20 were coated with fluoride gel. In group B 20 were brushed with gel. 20 each served as water control. The surface fluoride concentration and acid resistance of all samples were assessed using an acid etch technique. In a second experiment 30 halves of molar crowns were used. 10 were mounted in a plaster socket mimicking a dental arch for which a customized miniplast-tray was made. This tray was loaded with 1 g of gel and applied for 3 min on 3 consecutive days. 10 samples were brushed for 3 min on 3 days using 1 g of gel and 10 served as water control. Enamel that had been fluoridated with gel on a toothbrush showed a superior acid resistance. The fluoride concentration in the outer 20 to 25 microns of enamel was higher after gel application on a toothbrush than after tray application.
authors.affiliation: Abteilung für Präventivzahnmedizin, Universität Zürich.
authors.forename: T
authors.initials: T
authors.lastname: Imfeld
authors.forename: B
authors.initials: B
authors.lastname: Sener
authors.forename: G
authors.initials: G
authors.lastname: Menghini
authors.forename: F
authors.initials: F
authors.lastname: Lutz
mesh_terms: D000134:Acid Etching, Dental; D003743:Dental Enamel / Q000187:drug effects / Q000378:metabolism; D003762:Dental Instruments; D005069:Evaluation Studies as Topic; D005460:Fluorides, Topical / Q000008:administration & dosage* / Q000493:pharmacokinetics; D005782:Gels; D006801:Humans; D066298:In Vitro Techniques; D008963:Molar; D014099:Toothbrushing / Q000295:instrumentation*
chemical_list: D005460:Fluorides, Topical; D005782:Gels
vernacular_title: Fluoridgelees--Lokalapplikation mit Schiene oder Zahnbürste?