Question 39 · LDEK · Endodontic instruments
Indicate the true statements concerning instruments used for the preparation of root canals:
1) three- or four-step series of rotational movements of Flex-R files is related to the balanced force technique;
2) three- or four-step series of rotational movements of Flex-R files is related to the hybrid technique;
3) cross sections of a Profile instrument show a U-shape design;
4) cross sections of a Protaper instrument show a U-shape design.
The correct answer is:
2) three- or four-step series of rotational movements of Flex-R files is related to the hybrid technique;
3) cross sections of a Profile instrument show a U-shape design;
4) cross sections of a Protaper instrument show a U-shape design.
The correct answer is:
- A. 1,3.
- B. 1,4.
- C. 2,3.
- D. 2,4.
- E. only 1.
Hint
Link the three-step rotation sequence with Roane's technique, and compare radial lands with a convex triangular cross-section.
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