Endodontics · single question
Internal root resorption is caused by the activity of which cells?
Show answer and explanation
Correct answer: B. Odontoclasts (clastic cells)
- A. Odontoblasts FORM dentin; they do not resorb it. (Loss of the odontoblast/predentin layer is what exposes dentin to resorption.)
- B. Correct. Internal resorption is the loss of dentin from within the canal by clastic cells—odontoclasts/dentinoclasts—driven by pulpal inflammation.
- C. Ameloblasts form enamel and are gone after eruption.
- D. Cementoblasts form cementum, not the cells responsible for internal dentin resorption.
Note: The source keyed 'odontoblasts,' which is incorrect; resorption is performed by clastic cells (odontoclasts).