Question 536 · LDEK · Irrigation and intracanal medicaments
Choose correct statements regarding chlorhexidine:
1) it dissolves necrotic tissue in the root canal;
2) has a wide spectrum of activities toward bacteria, viruses and fungi;
3) it removes smear layer in combination with NaOCl;
4) it’s best used immediately after the use of NaOCl;
5) it is more effective in elimination of E. faecalis than NaOCl;
6) 2% concentrated solution is recommended for use in RCT.
The correct answer is:
2) has a wide spectrum of activities toward bacteria, viruses and fungi;
3) it removes smear layer in combination with NaOCl;
4) it’s best used immediately after the use of NaOCl;
5) it is more effective in elimination of E. faecalis than NaOCl;
6) 2% concentrated solution is recommended for use in RCT.
The correct answer is:
- A. 1, 3, 4.
- B. 2, 5, 6.
- C. 2, 4, 5.
- D. 3, 4, 5.
- E. 1, 3, 6.
Hint
Compare chlorhexidine with sodium hypochlorite: which one dissolves tissue, and what happens when the two meet in the canal?
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