The effect of a NaF solution and a fluoride varnish on the acid resistance of root dentin.
Sectioned root dentin surfaces were treated with either a NaF solution for 10 min or a fluoride varnish for 48 h and then exposed to 1 M acetate buffer pH 5.8 for 20 h. Microradiographs of non-fluoride treated specimens (controls) regularly showed a partially demineralized zone extending from the surface. The NaF-treated specimens exhibited a lesion with alternating radiopaque and radiolucent zones, which had a mean total depth equal to that of the controls. The varnish-treated specimens showed a demineralized zone which was significantly less deep than those observed in the two other groups. Elemental analyses performed by an electron microprobe showed a positive correlation between the amount of F incorporated and the acid resistance of the tissue.
D000085:Acetates / Q000494:pharmacology*; D003804:Dentin / Q000032:analysis / Q000187:drug effects*; D004338:Drug Combinations / Q000494:pharmacology; D004577:Electron Probe Microanalysis; D005459:Fluorides / Q000494:pharmacology*; D005460:Fluorides, Topical / Q000494:pharmacology; D006801:Humans; D008852:Microradiography; D011140:Polyurethanes / Q000494:pharmacology; D012821:Silanes / Q000494:pharmacology; D012969:Sodium Fluoride / Q000008:administration & dosage / Q000032:analysis / Q000494:pharmacology*; D013997:Time Factors
D000085:Acetates; D004338:Drug Combinations; D005460:Fluorides, Topical; D011140:Polyurethanes; D012821:Silanes; C022599:Fluor Protector; D012969:Sodium Fluoride; D005459:Fluorides