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Saturday, June 21, 2008

Conservative and Endodontics MCQ 03

Saturday, June 21, 2008

Which of the following are true of the crown-down technique?


1. To enlarge the coronal 1/3 of the canal preparation.

2. To enlarge the apical 1/3 of the canal to properly fit the master cone of gutta percha.

3.To use a sequential series of instruments, starting with the smaller sizes and progressing toward the larger sizes, irrespective of the instruments series used.

4. To use a series of instruments whereby one begins with larger sizes and progresses towards the smaller sizes.

5. NiTi rotary-shaping files are best.

6. ISO hand files and GGs are best.


Answers:

  1. 1, 3, 5

  2. 1, 3, 6

  3. 2 and 5

  4. 3 and 6

  5. 4 and 5

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