title: Effect of 10% fluoride on the remineralization of dentin in situ.
abstract: Objective The purpose of this randomized, cross-over, in situ study was to determine the remineralization of demineralized dentin specimens after the application of a 10% fluoride (F-) or a 1% chlorhexidine-1% thymol (CHX-thymol) varnish. Material and Methods Twelve individuals without current caries activity wore removable appliances in the lower jaw for a period of four weeks. Each appliance contained four human demineralized dentin specimens fixed on the buccal aspects. The dentin specimens were obtained from the cervical regions of extracted human third molars. After demineralization, half the surface of each specimen was covered with a nail varnish to serve as the reference surface. The dentin specimens were randomly assigned to one of the three groups: F-, CHX-thymol, and control (no treatment). Before the first treatment period and between the others, there were washout periods of one week. After each treatment phase, the changes in mineral content (vol% µm) and the lesion depths (µm) of the dentin slabs were determined by transverse microradiography (TMR). Data analysis was accomplished by the Kruskal-Wallis test and the Mann-Whitney U test (p<0.05). Results The medians (25th/75th percentile) of integrated mineral loss were 312.70 (203.0-628.7) for chlorhexidine varnish, 309.5 (109.8-665.8) for fluoride varnish, and -346.9 (-128.7 - -596.0) for the control group. The medians (25th/75th percentile) of lesion depth were 13.6 (5.7-34.5) for chlorhexidine varnish, 16.5 (5.6-38.1) for fluoride varnish, and -14.2 (-4.5- -32.9) for the control group. Use of the 10% F- or 1% CHX-1% thymol varnishes resulted in significantly decreased mineral loss and lesion depth in dentin when compared with the control group. There were no statistically significant differences among the test groups. Conclusions Within the limitations of this study, the results suggest that the effect of the treatment of demineralized dentin with 10% F- or 1% CHX-1% thymol is better than without any treatment.
authors.affiliation: Department of Operative and Preventive Dentistry, University Witten/Herdecke, Witten, Germany.
authors.forename: Mozhgan
authors.initials: M
authors.lastname: Bizhang
authors.affiliation: Department of Operative and Preventive Dentistry, University Witten/Herdecke, Witten, Germany.
authors.forename: Sabine
authors.initials: S
authors.lastname: Kaleta-Kragt
authors.affiliation: Department of Operative and Preventive Dentistry and Periodontics, Heinrich-Hein University Duesseldorf, Duesseldorf, Germany.
authors.forename: Preeti
authors.initials: P
authors.lastname: Singh-Hüsgen
authors.affiliation: Department of Operative Dentistry and Periodontology, Universitätsklinikum Freiburg, Freiburg, Germany.
authors.forename: Markus Jörg
authors.initials: MJ
authors.lastname: Altenburger
authors.affiliation: Department of Operative and Preventive Dentistry, University Witten/Herdecke, Witten, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Zimmer
mesh_terms: D000328:Adult; D002327:Cariostatic Agents / Q000008:administration & dosage*; D002710:Chlorhexidine / Q000008:administration & dosage*; D003804:Dentin / Q000187:drug effects*; D004338:Drug Combinations; D005260:Female; D005460:Fluorides, Topical / Q000008:administration & dosage*; D006801:Humans; D008297:Male; D008852:Microradiography; D012016:Reference Values; D018709:Statistics, Nonparametric; D013499:Surface Properties / Q000187:drug effects; D013943:Thymol / Q000008:administration & dosage*; D013997:Time Factors; D017001:Tooth Demineralization / Q000188:drug therapy*; D014089:Tooth Remineralization / Q000379:methods*; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D002327:Cariostatic Agents; D004338:Drug Combinations; D005460:Fluorides, Topical; C079161:chlorhexidine, thymol drug combination; D013943:Thymol; D002710:Chlorhexidine
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