Endodontics · single question
Which nerve fibers are responsible for the response detected by the electric pulp test?
Show answer and explanation
Correct answer: A. A-delta fibers
- A. Correct. Myelinated A-delta fibers mediate the fast, sharp sensation detected by the EPT (and by cold).
- B. Incorrect. Unmyelinated C fibers carry dull, lingering pain associated with heat and irreversible pulpitis — not the EPT response.
- C. Incorrect. A-beta fibers transmit touch/pressure, not pulpal vitality testing responses.
- D. Incorrect. Sympathetic fibers regulate vascular tone, not the EPT sensory response.