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Dentine permeability and tracer tests

M S Gale1, B W Darvell

  • 1Conservative Dentistry and Dental Materials Science, University of Hong Kong.

Journal of Dentistry
|January 29, 1999
PubMed
Summary
This summary is machine-generated.

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Dentine is porous and can lead to inaccurate results in leakage tests. Special test designs are needed to account for dentine

Area of Science:

  • Dental materials science
  • Biomaterials research
  • Restorative dentistry

Background:

  • Leakage tests are crucial for evaluating dental restorations.
  • Dentine's permeability is a significant factor influencing these tests.
  • Previous studies have not fully addressed dentine's porous nature.

Purpose of the Study:

  • To review evidence on dentine permeability.
  • To highlight its confounding effect on leakage test measurements.
  • To emphasize the need for specialized test designs.

Main Methods:

  • Comprehensive literature review from 1887 to 1997.
  • Analysis of 249 relevant articles.
  • Focus on studies investigating tracer penetration and material interfaces.

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Main Results:

  • Intact dentine is typically porous to common tracers via its tubules.
  • This porosity can cause false positive results in leakage tests.
  • Enamel is relatively impermeable, allowing for accurate testing of enamel-restoration seals.

Conclusions:

  • Dentine's inherent porosity complicates tracer penetration tests.
  • Specialized test designs are essential for accurate assessment of restoration seal in dentine.
  • Failure to control for dentine permeability yields unreliable data.