Question 69 · LDEK · Endodontic instruments
Which of the following concerning the work with Lentulo spiral drill is true?
1) Lentulo spiral drill is used for engine-driven root canal preparation;
2) Lentulo spiral drill is used for root canal obturation;
3) Lentulo spiral drill is inserted without rotation to the working length;
4) Lentulo spiral drill is inserted without rotation to the length shorter than the working length;
5) Lentulo spiral drill is inserted with rotation at a slow speed (300-500/min) to the working length.
The correct answer is:
2) Lentulo spiral drill is used for root canal obturation;
3) Lentulo spiral drill is inserted without rotation to the working length;
4) Lentulo spiral drill is inserted without rotation to the length shorter than the working length;
5) Lentulo spiral drill is inserted with rotation at a slow speed (300-500/min) to the working length.
The correct answer is:
- A. 1,3.
- B. 1,5.
- C. 2,3.
- D. 2,4.
- E. 2,5.
Hint
Recall what the Lentulo spiral carries into the canal, at what speed it turns and how deep it may go to avoid extrusion or fracture.
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