Question 425 · LDEK · Endodontic instruments
Beginning with a file in size 60, the diameter of the tool tip at D₀ increases (relative to the next tool) by:
- A. 0.01 mm.
- B. 0.05 mm.
- C. 0.10 mm.
- D. 0.15 mm.
- E. 0.50 mm.
Hint
Recall the ISO numbering: the file number equals the D0 diameter in hundredths of a millimetre, and the steps change above size 60.
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