Question 298 · LDEK · Access and canal preparation
Which of the following concerning the principles of endodontic treatment is true?
1) use of rotary Ni-Ti instruments while shaping the root canal does not eliminate completely the necessity to use hand instruments;
2) root canal with necrotic pulp should be prepared up to the radiographic apex;
3) coronal part of the root canal should be prepared to a greater extent than the apical area of the canal;
4) recapitulation is performed in order to maintain root canal patency;
5) irrigation of the root canal should be started after finishing its mechanical shaping.
The correct answer is:
2) root canal with necrotic pulp should be prepared up to the radiographic apex;
3) coronal part of the root canal should be prepared to a greater extent than the apical area of the canal;
4) recapitulation is performed in order to maintain root canal patency;
5) irrigation of the root canal should be started after finishing its mechanical shaping.
The correct answer is:
- A. 1,2,4.
- B. 1,3,4.
- C. 1,2,5.
- D. 2,3,4.
- E. 2,3,5.
Hint
Recall the apical end-point of preparation, the desired shape of the canal and when irrigation should begin.
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