Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Representative sectional images at the level of 1, 3, and 5 mm from the apex (from top to bottom) of each group. Before (red: left side), after (green: middle side) the instrumentation, and superimposition of the 2 images (right side). (A) Vortex Blue, (B) ProTaper Next, and (C) ProTaper Universal.
