Endodontics · single question
According to the hydrodynamic theory of dentin sensitivity, what best explains the pain mechanism?
Show answer and explanation
Correct answer: B. Movement of dentinal fluid within the tubules
- A. INCORRECT. ATP signaling is not the basis of the hydrodynamic theory.
- B. CORRECT. Stimuli cause fluid shifts within dentinal tubules, which mechanically activate pulpal A-delta nerve fibers and produce sharp pain.
- C. INCORRECT. Ameloblasts are lost after enamel formation and play no role in sensitivity.
- D. INCORRECT. Odontoblast apoptosis is not the proposed mechanism.