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Iron and dental caries.

P Torell1

  • 1Public Dental Service of Gothenburg, Sweden.

Swedish Dental Journal
|January 1, 1988
PubMed
Summary

Iron ions form acid-resistant coatings on teeth, preventing cavities. These iron compounds attract calcium and phosphate, aiding mineral replacement in tooth enamel damaged by acid erosion.

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Area of Science:

  • Dental research
  • Materials science

Background:

  • Dental caries is a prevalent oral disease.
  • Previous studies suggest potential roles for iron in oral health.

Purpose of the Study:

  • To investigate the caries-preventing effects of iron.
  • To visualize the interaction of iron ions with tooth enamel.

Main Methods:

  • Scanning electron microscopy (SEM) and X-ray fluorescence analysis (XRF) of hamster teeth and iron solutions.
  • Transmission electron microscopy (TEM) and electron diffraction of enamel, lesions, bone, and iron coatings.

Main Results:

  • Iron ions precipitate on enamel, forming thin, acid-resistant coatings of hydrous iron oxides.
  • These iron compounds facilitate the nucleation of apatite formation by adsorbing salivary calcium and phosphate.
  • This process aids in replacing minerals lost during acid attacks, characteristic of caries.

Conclusions:

  • Iron ions exhibit a caries-preventing effect by forming protective enamel coatings.
  • Iron compounds promote remineralization of tooth enamel through apatite nucleation.

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