Question 320 · LDEK · Access and canal preparation
Indicate the true statements concerning root canal shaping with crown-down method:
1) root canal shaping starts with the largest files;
2) root canal shaping starts with the smallest files;
3) initially apical 1/3rd of root canal length is shaped;
4) rotary instruments are commonly used;
5) it is one of apical-coronal methods.
The correct answer is:
2) root canal shaping starts with the smallest files;
3) initially apical 1/3rd of root canal length is shaped;
4) rotary instruments are commonly used;
5) it is one of apical-coronal methods.
The correct answer is:
- A. 1,3.
- B. 1,4.
- C. 1,5.
- D. 2,3.
- E. 2,4.
Hint
The name of the technique tells you which part of the canal is enlarged first and with which size of instruments.
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