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Endodontics · single question

The advantage of using toothpaste (conducting medium) when applying the ELECTRIC PULP TESTER (EPT) is:

  1. Anesthetizes the area to prevent pain
  2. Stabilizes the pH of the testing area
  3. Increases electrical conductivity between the probe and tooth surface
  4. Bleaches the enamel to improve probe contact
Show answer and explanation

Correct answer: C. Increases electrical conductivity between the probe and tooth surface

  • A. Incorrect. Toothpaste does not anesthetize — local anesthetic would defeat the purpose of pulp testing.
  • B. Incorrect. pH stabilization is not the mechanism by which toothpaste aids the EPT.
  • C. Correct. Toothpaste (or other conducting media like toothpaste, K-Y jelly) is applied to the EPT probe to INCREASE ELECTRICAL CONDUCTIVITY between the metal probe and the tooth surface. Without a conductor, the poor contact between metal and enamel can prevent current transmission. The conducting medium ensures reliable current passage for accurate pulp vitality testing.
  • D. Incorrect. Bleaching is not relevant to EPT function.

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