Question 411 · LDEK · Access and canal preparation
The balanced force technique can be used for mechanical root canal preparation. Which of the following statements concerning this technique are true?
1) order of movements made with the instrument is as follows: clockwise direction (CW) - counterclockwise direction (CCW) - clockwise direction (CW);
2) order of movement is: CCW - CW - CCW;
3) range of movement is the same in both directions (e.g. 90 degrees CW and 90 degrees CCW);
4) when the instrument is moved CCW, the clinician should press apically;
5) balanced force technique is used mainly for preparing large and straight canals.
The correct answer is:
2) order of movement is: CCW - CW - CCW;
3) range of movement is the same in both directions (e.g. 90 degrees CW and 90 degrees CCW);
4) when the instrument is moved CCW, the clinician should press apically;
5) balanced force technique is used mainly for preparing large and straight canals.
The correct answer is:
- A. 1,3.
- B. 2,3.
- C. 1,4.
- D. 3,5.
- E. 2,5.
Hint
Recall Roane's sequence: the file is first set into dentin, then the cutting rotation is done under apical pressure, then debris is collected.
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