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.
Two investigators, blinded at which electronic apex locator was used, recorded the distance from the end of the file to minor diameter under stereomicroscope (labomed) at ×10 magnification. (negative value indicates short [or coronal] to minor diameter)
