Question 328 · LDEK · Access and canal preparation
Indicate the true statements regarding the preparation of root canals with the step-back technique:
1) after canal preparation with MAF, the subsequent larger files are placed at the length shorter than the working length determined earlier;
2) after canal preparation with MAF, the subsequent larger files are placed at the length equal to the working length determined earlier;
3) canal prepared with the step back technique has a cone shape;
4) the step-back technique is inferior to the standard preparation in terms of debridement and canal shape obtainment.
The correct answer is:
2) after canal preparation with MAF, the subsequent larger files are placed at the length equal to the working length determined earlier;
3) canal prepared with the step back technique has a cone shape;
4) the step-back technique is inferior to the standard preparation in terms of debridement and canal shape obtainment.
The correct answer is:
- A. 1,3.
- B. 2,4.
- C. 3,4.
- D. 1,4.
- E. 2,3.
Hint
Think about the meaning of 'step back': what happens to the length of each larger file once the master apical file has been reached?
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