| 摘要 |
A series of multi-tapered parabolic implements (18) is disclosed for endodontic use. The implements comprise different sections: a pilot tip (20) , a first portion (.prop.) adjacent the pilot tip and a second portion (.beta. ) adjacent the shank. The two portions have different tapers. The tapers of th e two different portions blend into each other along a parabola-shaped surface . |
