2023-12-12 21:51:11

How many is the working length and full length of the root canal preparation instrument?How many length categories are there?

①The length of the working end cutting edge is 16mm.
②The distance from the tip to the handle can be 21, 25, 28 and 31mm respectively, but the length of the working end remains constant when the working end is 16mm.

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How many is the working length and full length of the root canal preparation instrument?How many length categories are there?