Fluoride Release from Two High-Viscosity Glass Ionomers after Exposure to Fluoride Slurry and Varnish.

Hani M Nassar,Jeffrey A Platt

doi:10.3390/ma12223760

Abstract

The effect of brushing with different fluoride slurries on the fluoride release (FR) of different high-viscosity glass ionomer cements (GICs) was investigated. Fifty-eight discs were fabricated from two high-viscosity GICs (GC Fuji IX (F9) and 3M ESPE Ketac-fil (KF)). Five specimens from each brand were used to measure Vickers microhardness and the remaining were randomly assigned to one of four groups (n = 6) based on two-factor combinations: (1) fluoride concentration in the abrasive slurry (275 or 1250 ppm fluoride as NaF) and (2) immersion in a 22,500 ppm fluoride-containing solution. Specimens were brushed for a total of 20,000 strokes over 4 days with daily FR measurement. Data were analyzed using analysis of variance and Bonferroni tests (α = 0.05). Baseline FR and microhardness values were different between the two tested material brands. Exposure to a 22,500 ppm solution was associated with higher FR but not the exposure to 1250 ppm slurries. Brushing and immersion of glass ionomer cements in a 22,500 ppm F solution led to higher FR that was more sustained for KF. Type of the glass ionomer, progressive brushing, and fluoride varnish affected FR but not the fluoride content in the abrasive slurry.

Highlights

Fluoride release from high-viscosity glass ionomer cements (GICs) has been proposed as a possible mechanism for reducing the incidence of dental caries [1,2]
Brushing with prescription toothpaste containing 5000 ppm fluoride and using a fluoridated mouth rinse are two recommendations that clinicians give to their patients to manage and prevent dental caries according to established caries management protocols such as CAMBRA and Cariogram [13,14,15]
The objective of this study was to investigate the effects of slurry fluoride concentration and material brand on the fluoride release from conventional glass ionomer cements in the presence of a fluoride varnish-simulated step

Summary

Introduction

Fluoride release from high-viscosity glass ionomer cements (GICs) has been proposed as a possible mechanism for reducing the incidence of dental caries [1,2]. Brushing with prescription toothpaste containing 5000 ppm fluoride and using a fluoridated mouth rinse are two recommendations that clinicians give to their patients to manage and prevent dental caries according to established caries management protocols such as CAMBRA and Cariogram [13,14,15]. These factors would allow the exposure of GICs to higher fluoride concentrations potentially leading to an enhancement of fluoride recharge and release

Objectives

Methods

Results

Discussion

Conclusion