Question 257 · LDEK · Irrigation and intracanal medicaments
Which of the following concerning irrigating solutions used in endodontic treatment is true?
- A. chlorhexidine may be used alternatively with sodium hypochlorite.
- B. EDTA has a broad spectrum of antimicrobial activity.
- C. in the case of the extrusion of an irrigating solution beyond the apical foramen, sodium hypochlorite exibits much greater toxicity to periapical tissues than chlorhexidine.
- D. citric acid is especially recommended for irrigating root canals in teeth with persistent lesions in periapical tissues.
- E. isopropyl alcohol may be used for smear layer removal.
Hint
Compare the tissue-dissolving properties of the two antiseptics and what that means if they reach the periapical tissues.
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