This part of YY/T 0873 specifies the coding numbers for root canal instrument characteristics. These 3-digit numbers are located at the 10th, 11th, and 12th digits of the 15-digit full array, forming the fourth group of 3-digit numbers in the 15-digit full array. The encoding principles have been explained in YY/T 0873.1 and YY/T 0873.2 .
YY/T 0873.5-2014 history
2014YY/T 0873.5-2014 Dentistry.Number coding system for rotary instruments.Part 5:Specific characteristics of roof-canal instruments