It's a matter of taper | 合法醫療器材資訊網

02taperfile(20/.02)is.20mmatD-1,andatD-10,thediameterisactually.40mm.Wehavecalculatedthisnumber ...

Dennis Brave and Ken Koch

As readers of our Real World Endo column know, we are strong proponents of a fully tapered .06 preparation. This preparation offers multiple benefits. But the question we often get is, "How am I going to place a .06 taper file into a space that is problematic with a .02 taper? Isnt a .06 taper file just three times the width of a .02 taper?

Actually, the answer this question is "no." A .06 taper, in fact, is not just three times the width of a .02 taper. The proof is in the arithmetic. Lets take the following example.

A number 20, .02 taper file (20/.02) is .20 mm at D-1, and at D-10, the diameter is actually .40 mm. We have calculated this number by multiplying the taper (.02) times the length (10 mm). We then add the apical tip size at D-1 (.20) to the previously calculated number and we get .40 mm. Lets now increase the taper from .02 to .04. Do the...