Endodontics · single question
Topical anesthetic used inside the root canal during endodontic treatment causes what problem?
Show answer and explanation
Correct answer: D. Coats the canal and prevents adequate obturation
Intracanal topical anesthetic coats the canal walls and prevents proper obturation — the oily vehicle contaminates walls and interferes with sealer bond.
- A. ❌ Topical anesthetic does not increase perforation risk.
- B. ❌ Topical anesthetic does not cause irreversible pulpitis.
- C. ❌ Ledge formation is a mechanical complication unrelated to topical anesthetic.
- D. ✅ CORRECT – The vehicle of topical anesthetic coats dentinal walls, preventing proper sealing during obturation.