Endodontics · single question
The same patient requiring internal bleaching. Which material would you use?
Show answer and explanation
Correct answer: A. Sodium perborate
- A. Correct. Sodium perborate (often mixed with water) is the material of choice for the 'walking bleach' technique for non-vital teeth — effective and safer than high-concentration peroxide sealed inside the chamber.
- B. Carbamide peroxide is used for vital (tray) bleaching, not the internal walking-bleach technique.
- C. 35% hydrogen peroxide is caustic and increases the risk of cervical resorption when used internally.
- D. Calcium hydroxide is used as a protective cervical barrier/medicament, not as the bleaching agent itself.