Fluoridation of hydroxyapatite powder by ammonium hexafluorosilicate

Caries Research
H MurataT T Yamamoto

Abstract

Diamine silver fluoride [AgF: (NH3)2AgF] is a unique fluoride solution used clinically in Japan for primary teeth. AgF has been shown to reduce dental caries and dentine hypersensitivity. However, AgF also stains teeth black due to sulfide precipitation and thus is unacceptable for permanent teeth. In the present study, the potential value of ammonium hexafluorosilicate [SiF: (NH4)2SiF6], which has a formula similar to that of AgF but contains no Ag, was studied with respect to its ability to fluoridate apatite. Hydroxyapatite [HAP: Ca10(PO4)6(OH)2] powder was treated with several topical fluoride solutions, i.e. neutral sodium fluoride, acidulated phosphate fluoride (APF) along with AgF and SiF. Following treatment, the HAP powders were analyzed for their fluorine content, crystallinity changes, and solubility in acidic solution. The highest level of fluoridated HAP [FAP: Ca10(PO4)6(OH)xF2-x] was observed in HAP powder treated with SiF, even though more total fluorine in the form of FAP and CaF2 was observed in HAP powder samples treated with APF. Presumably as a consequence of this higher level of FAP formation after SiF treatment, the highest level of crystallinity along with the lowest solubility in acidic solution were obs...Continue Reading

Citations

May 6, 2005·Journal of Materials Science. Materials in Medicine·A KawasakiS Ebisu
Jul 15, 2011·The Angle Orthodontist·Shinya HoriuchiEiji Tanaka
Apr 10, 2012·Journal of Dentistry·J J-Y PengJ P Matinlinna
Sep 15, 2009·Dental Materials : Official Publication of the Academy of Dental Materials·Toshiyuki SugeShigeyuki Ebisu
Dec 17, 2015·Journal of Oral Science·Selcuk SavasMustafa Ates
Oct 30, 2016·Journal of Applied Biomaterials & Functional Materials·Ebru Kucukyilmaz, Selcuk Savas

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