title: Intra-oral variations in total plaque fluoride related to plaque pH. A study in orthodontic patients.
abstract: The aim of the present investigation was to study intra-oral variations in total plaque fluoride, and to examine whether such variations were related to plaque pH. Five orthodontic patients abstained from oral hygiene and daily fluoride rinsing for 2 days. Resting and fermenting plaque pH was measured with a touch micro-electrode at 14-21 localized sites on bonded vestibular tooth surfaces in each subject. Plaque samples from the same sites were analysed with a fluoride micro-electrode. A wide range of plaque pH values and fluoride concentrations were observed. In all subjects plaque pH and total fluoride levels were lower at upper than at lower front teeth. A direct log-linear relationship existed between total fluoride and fermenting plaque pH. In 4 of the 5 subjects this relationship was statistically significant (p < 0.05) and quite strong (adjusted R2 0.2-0.5, Beta 0.5-0.7). The study shows significant intra-oral variations in total plaque fluoride related to plaque pH.
authors.affiliation: Department of Operative Dentistry and Endodontics, Faculty of Dentistry, University of Oslo, Norway.
authors.forename: P
authors.initials: P
authors.lastname: Arneberg
authors.forename: E
authors.initials: E
authors.lastname: Giertsen
authors.forename: H
authors.initials: H
authors.lastname: Emberland
authors.forename: B
authors.initials: B
authors.lastname: Ogaard
mesh_terms: D000293:Adolescent; D002327:Cariostatic Agents / Q000032:analysis*; D003481:Cuspid; D003773:Dental Plaque / Q000737:chemistry* / Q000378:metabolism / Q000503:physiopathology; D005260:Female; D005285:Fermentation; D005459:Fluorides / Q000032:analysis*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007180:Incisor; D016014:Linear Models; D008297:Male; D008334:Mandible; D008437:Maxilla; D008839:Microelectrodes; D009055:Mouth / Q000502:physiology; D009967:Orthodontic Appliances; D011506:Proteins / Q000032:analysis
chemical_list: D002327:Cariostatic Agents; D011506:Proteins; D005459:Fluorides