Question 378 · LDEK · Irrigation and intracanal medicaments
Indicate the true statements about EDTA and urea based lubricants used in endodontics:
1) have strong bactericidal potential;
2) have the ability to bind calcium ions from the root dentin surface;
3) do not require rinsing before root canal filling;
4) may be the cause of acute inflammatory symptoms from periapical tissues.
The correct answer is:
2) have the ability to bind calcium ions from the root dentin surface;
3) do not require rinsing before root canal filling;
4) may be the cause of acute inflammatory symptoms from periapical tissues.
The correct answer is:
- A. 3,4.
- B. 1,4.
- C. 1,2.
- D. 2,3.
- E. 2,4.
Hint
Focus on what EDTA does chemically and on what happens when chemical residues remain in the canal or pass beyond the apex.
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