Conservative and Endodontics MCQ Answer 8

Wednesday, June 21, 2000

Conservative and Endodontics MCQ Answer 8

Posted by Vishaal at 6/21/2000 10:37:00 PM Wednesday, June 21, 2000

Labels: Conservative and Endodontics MCQs

Answer is c.

The file number represents the size at D₀ which is the tip of the file. The number 10 file is 0.10mm in diameter at D₀, and tapers at 0.020mm for 16mm and terminates at a diameter of 0.42mm at D₁₆ which it the end of the flutes at the shank. ISO file sizes 10 through 60 have diameters at D₀ that increase by 0.05mm. From No. 60 onward to 140 D₀ increases by 0.10mm. How about the No. 6 and 8 file you ask, well just think of them as in hundredths of a millimeter in that a No. 6 file is 0.06mm and No. 8 file is 0.08mm at D₀. (Pathways of the Pulp 8^th, p250)

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Wednesday, June 21, 2000