Ion uptake into demineralized dentine from glass ionomer cement following pretreatment with silver fluoride and potassium iodide

Abstract

Background: Diamine silver fluoride (Ag(NH 3 ) 2 F), referred to as AgF, has been shown to provide a pronounced antimicrobial action against caries. The clinical application of this material has been limited by the staining associated with both teeth and tooth coloured restorative materials. The application of potassium iodide (KI) after AgF eliminates stain formation. The purpose of this study was to determine if a prior application of silver fluoride and potassium iodine to demineralized dentine affected the uptake of strontium and fluoride from a glass ionomer cement restoration. Method: Three cavities were prepared in each of five recently extracted human third molars. The cavities were demineralized and treated as follows. In each tooth, one cavity was left as a control, one cavity was restored with glass ionomer cement and one cavity was treated with 1.8M AgF and a saturated KI solution and then restored with glass ionomer cement. The penetration of the various elements into demineralized dentine was measured by their relative percentage weights using electron probe microanalysis (EPMA). Results: Fluoride uptake was significantly higher in the AgF and KI treated samples compared to the other two samples and significantly higher in the glass ionomer restored sample compared to the control. The application of AgF and KI did not significantly interfere with the transfer of strontium from glass ionomer cement into dentine. Silver and iodine deposits were present in the demineralized dentine treated with AgF and KI. Conclusions: The application of AgF and KI onto dentine prior to the placement of glass ionomer cement did not significantly affect the strontium uptake into the subjacent demineralized dentine and the fluoride levels in this zone were significantly increased. S C I E N T I F I C A R T I C L EAbbreviations and acronyms: Ag = silver; AgF = diamine silver fluoride; Ca = calcium; EPMA = electron probe microanalysis; F = fluorine; I = iodine; KI = potassium iodide; P = phosphorus; rpm = revolutions per minute; Sr = strontium.

Comparison of resin-based and glass ionomer sealants with regard to fluoride-release and anti-demineralization efficacy on adjacent unsealed enamel

“…Knight et al reported strontium incorporation into dentine by applying FVII 44) . Interest in the release of strontium from modern glass ionomer materials have been increased 45) .…”

The Short-term Effects of Diammine Silver Fluoride on Tooth Sensitivity

“…The staining of carious dentin can be minimized by the application of potassium iodide solution after treatment without reducing the effect (Knight et al, 2006). Diammine silver fluoride has been shown to arrest caries in animal models (Tanzer et al, 2010) and to be more effective than sodium fluoride varnish in human trials (Chu et al, 2002;Llodra et al, 2005;Rosenblatt et al, 2009;Tan et al, 2010).…”

Differences between normal and demineralized dentine pretreated with silver fluoride and potassium iodide after an in vitro challenge by Streptococcus mutans

“…11 The electron probe microanalysis technique (EPMA) has confirmed the transfer of strontium and fluoride ions into the dentine from glass ionomer cement. [12][13][14] The ability to measure the percentage weights of chosen elements enables an analysis of the amount of tooth loss, the penetration depth of reaction products and their affects upon tooth demineralization.…”