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Electric pulp tester conductance through various interface media.

André K Mickel1, Kimberly A D Lindquist, Sami Chogle

  • 1Department of Endodontics, School of Dental Medicine, Case Western Reserve University, Cleveland, OH 44106-4905, USA. axm69@case.edu

Journal of Endodontics
|December 19, 2006
PubMed
Summary

Electric pulp testing requires conductive media. This study found Listerine conducted the most voltage, while K-Y UltraGel and a specific toothpaste showed significant conductivity among non-liquid options for dental use.

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Area of Science:

  • Dentistry
  • Biomaterials
  • Electrical Engineering

Background:

  • Electric pulp testing (EPT) is a common diagnostic tool in dentistry.
  • A conductive medium is essential for accurate EPT readings.
  • Variations in conductivity between different media may affect diagnostic outcomes.

Purpose of the Study:

  • To investigate and compare the electrical conductance of various common dental office media.
  • To determine if differences in current conductance exist across tested media.
  • To identify optimal conductive media for use with electric pulp testers.

Main Methods:

  • An electric pulp tester (EPT) and voltmeter were used to measure voltage.
  • The cathode was placed in the pulpal tissue of an extracted premolar, and the anode was connected to the EPT handpiece.

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  • Various readily available dental office media were tested as interfaces between the EPT tip and the tooth, with dry contact and direct cathode contact serving as controls.

    • Main Results:

    • Listerine demonstrated the highest voltage conduction among the tested media.
    • K-Y Brand UltraGel and Crest Baking Soda & Peroxide Whitening Tartar Control toothpaste showed significantly higher voltage readings compared to other non-liquid media.
    • A dry EPT tip-to-tooth contact yielded 0 V (negative control), while direct EPT tip-to-cathode contact yielded 3.9 V (positive control).

    Conclusions:

    • Significant differences in electrical current conductance exist among various media used in dental practices.
    • Antiseptic mouthwashes like Listerine may offer superior conductivity for EPT.
    • Specific gels and toothpastes can also provide adequate conductivity for electric pulp testing applications.