Question 42 (part 2) · LDEK · Access and canal preparation
During filing of the curved canal “straightening” of its course often happens, which requires correction of the working length. Choose correct statement regarding the “straightening” of the canal edge:
1) it is a result of removing larger part of the dentin in the area of minor curvature;
2) it is a result of removing larger part of the dentin in the area of major curvature;
3) it results in elongating of the working length;
4) working length measure before canal preparation may prove to be too long after preparation by even 1 mm;
5) the file also undergoes straightening.
Correct answer is:
2) it is a result of removing larger part of the dentin in the area of major curvature;
3) it results in elongating of the working length;
4) working length measure before canal preparation may prove to be too long after preparation by even 1 mm;
5) the file also undergoes straightening.
Correct answer is:
- A. 1,4,5.
- B. 4,5.
- C. 2,5.
- D. 2,3,4.
- E. 1,3,4.
Hint
A flexible file tries to straighten itself; consider which wall of the curve it cuts coronally and what a straighter path does to canal length.
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