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Related Concept Videos

Solubility Equilibria: Overview01:09

Solubility Equilibria: Overview

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When a substance such as sodium chloride is added to water, it dissolves, forming an aqueous solution. The extent of dissolution is called solubility. The process of dissolution can exist in equilibrium, just like other chemical processes. Solubility equilibria are also called precipitation equilibria because the process of solubility can be reversible. The reverse of the solubility process is called precipitation.
Solubility is important in biological and environmental processes. A notable...
736

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Related Experiment Video

Updated: Aug 5, 2025

Detection and Removal of Tooth-Colored Composite Resin Using the Fluorescence-Aided Identification Technique
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Fluoride Retention in Root Dentin following Surface Coating Material Application.

Katsushi Okuyama1, Yasuhiro Matsuda2, Hiroko Yamamoto3

  • 1Department of Dental Material Science, Division of Oral Functional Sciences and Rehabilitation, Asahi University School of Dentistry, Mizuho 501-0296, Japan.

Journal of Functional Biomaterials
|March 28, 2023
PubMed
Summary
This summary is machine-generated.

High fluoride-releasing dental coatings show increased fluoride in tooth dentin but less tooth-bound fluoride. This suggests materials like Clinpro XT varnish deliver substantial fluoride, though its conversion into bound forms varies.

Keywords:
KOH treatmentfluoride-containing coating materialhydroxyapatitein-air micro-PIXE/PIGEroot dentintooth-bound fluoride

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Area of Science:

  • Materials Science
  • Biomaterials
  • Dental Research

Background:

  • Fluoride-containing dental materials are crucial for preventing tooth decay.
  • Understanding fluoride uptake and binding in dentin is essential for optimizing material efficacy.
  • In-air micro-particle-induced X-ray/gamma emission (µPIXE/PIGE) offers a non-destructive method for elemental analysis in dental tissues.

Purpose of the Study:

  • To evaluate tooth-bound fluoride (T-F) in dentin after applying different fluoride-containing tooth-coating materials.
  • To compare the fluoride release, total fluoride content (W-F), and T-F/W-F ratios among various dental materials.
  • To investigate the relationship between fluoride release from materials and fluoride distribution within tooth structure.

Main Methods:

  • Application of three fluoride-containing materials (PRG Barrier Coat, Clinpro XT varnish, Fuji IX EXTRA) and a control to human molar root dentin.
  • Storage in a remineralizing solution for 7 or 28 days.
  • Analysis using in-air µPIXE/PIGE to measure fluoride and calcium distribution, with separate analyses for total fluoride (W-F) and tooth-bound fluoride (T-F) after KOH treatment.

Main Results:

  • Clinpro XT varnish exhibited the highest fluoride release.
  • Materials with high fluoride release showed higher W-F and T-F in dentin.
  • A lower T-F/W-F ratio was observed with high-releasing materials, indicating less conversion to tooth-bound fluoride.

Conclusions:

  • High fluoride-releasing dental materials lead to greater fluoride distribution in tooth structure.
  • The conversion of released fluoride into tooth-bound fluoride is not directly proportional to the release rate.
  • In-air µPIXE/PIGE is effective for evaluating fluoride dynamics in dentin following the application of dental coatings.