Question 272 · LDEK · Endodontic retreatment
Which of the following is used for the removal of gutta-percha from the canal during root canal retreatment?
1) Hedström file;
2) nickel-titanium engine-driven files;
3) Lentulo spiral drill;
4) heated Hedström file;
5) 2% chlorhexidine.
The correct answer is:
2) nickel-titanium engine-driven files;
3) Lentulo spiral drill;
4) heated Hedström file;
5) 2% chlorhexidine.
The correct answer is:
- A. 1,2,3.
- B. 1,2,4.
- C. 1,4,5.
- D. 2,3,4.
- E. 2,4,5.
Hint
Think of instruments that can engage, soften or pull out gutta-percha mechanically or with heat; exclude a paste carrier and an irrigant.
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