Revised ANSI/ADA specifications No. 28 for root canal files and reamers, type K, and No. 58 for root canal files, type H (Hedstrom). Council on Dental Materials, Instruments, and Equipment.
D000571:American Dental Association; D003748:Dental Equipment / Q000592:standards; D003762:Dental Instruments / Q000592:standards; D003764:Dental Materials / Q000592:standards; D012390:Root Canal Therapy / Q000295:instrumentation* / Q000592:standards; D014481:United States
D003764:Dental Materials