Question 106 · LDEK · Endodontic instruments
Indicate the rules for working with NiTi rotary instruments:
1) it’s necessary to verify canal patency with a hand file;
2) observing the correct torque;
3) maintaining the constant speed of 700 rpm;
4) rotational movements in the range not exceeding 90°;
5) rinsing the root canal with each usage of the file.
The correct answer is:
2) observing the correct torque;
3) maintaining the constant speed of 700 rpm;
4) rotational movements in the range not exceeding 90°;
5) rinsing the root canal with each usage of the file.
The correct answer is:
- A. 1,2,3.
- B. 1,2,5.
- C. 3,4,5.
- D. 1,3,4.
- E. 1,2,4.
Hint
Consider what protects a NiTi file from torsional fracture and what keeps the canal from getting blocked with debris.
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