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X-ray microanalysis of dentin: a review.

E Hals1, A B Tveit, B Tøtdal

  • 1Department of Cardiology and Endodontics, School of Dentistry, University of Bergen, Norway.

Scanning Microscopy
|March 1, 1988
PubMed
Summary

X-ray microanalysis (XMA) of dentin provides semi-quantitative elemental concentrations. This review details XMA findings in dentin, including ion uptake near fillings and changes in carious lesions.

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Area of Science:

  • Dental materials science
  • Biomineralization
  • Analytical chemistry

Background:

  • Dentin composition and structure are crucial for understanding dental health and disease.
  • X-ray microanalysis (XMA) offers valuable insights into elemental distribution within dentin.
  • Previous studies have explored various aspects of dentin analysis using XMA.

Purpose of the Study:

  • To review and summarize the literature on X-ray microanalysis (XMA) of dentin.
  • To include both energy-dispersive (EDS) and wavelength-dispersive (WDS) XMA techniques.
  • To highlight key findings regarding elemental concentrations in different dentin conditions and treatments.

Main Methods:

  • Literature review of studies employing X-ray microanalysis (XMA) on dentin.
  • Analysis of data from energy-dispersive (EDS) and wavelength-dispersive (WDS) techniques.
  • Compilation of elemental concentration data from various experimental conditions.

Main Results:

  • XMA estimations of dentin composition are generally semi-quantitative.
  • Specific elemental changes were observed in odontoblasts, predentin, and hypermineralized peritubular dentin.
  • Caries lesions showed decreased Ca, P, Mg, Cl, and increased S, Zn; mineralized surfaces had high F, K.
  • Cavity walls absorbed ions from filling materials (Zn, Sn, F, Al).
  • Topical fluoride applications showed high F concentrations with TiF4, Duraphat, and Fluor Protector.
  • Dentin near amalgam fillings had reduced Ca, P, but increased Zn, Sn, explaining radiopacity.

Conclusions:

  • XMA is a powerful tool for semi-quantitative elemental analysis of dentin.
  • Dentin's elemental composition is dynamic and affected by caries, mineralization, and restorative materials.
  • Understanding ion dynamics in dentin is critical for dental material development and treatment strategies.

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