Historical
ANSI/ADA Specification No. 58-1997
Root Canal Files, Type H (Hedstrom)
This specification is for endodontic Hedstrom files for hand use only as used in endodontic preparation or shaping operations.
American Dental Association [ada]
This specification is for endodontic Hedstrom files for hand use only as used in endodontic preparation or shaping operations.