Standardization of Endodontic Instruments Revision Notes

Standardization of Endodontic Instruments

Notes on Standardization of Endodontic Instruments


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INTRODUCTION

A variety of instruments are available for the extirpation of the pulp and the instrumentation, preparation, and obturation of the root canal

• Although almost all these instruments were designed between 50 and 100 years ago

• Important changes have occurred in recent years with regard to their quality, efficacy, and standardization.

• Instrumentation of the root canal system requires both hand and rotary files

• No canal system can or should be instrumented with rotary files alone.

HISTORY

History Standardization of Endodontic Instruments


STANDARDIZATION OF ENDODONTIC INSTRUMENTS

Standardization of Endodontic Instruments

  • Instruments are numbered from 10 to 100. Increase in 5 units up to size 60 and in 10 units till they are size 100. This has been revised to include numbers from 6 to 140.
  • Diameter of instrument in 100th of millimeter at the tip is D1
  • The working blade shall begin at tip (D1) and extend 16 mm up the shaft (D2).
  • D2 should be 0.32 mm greater than D1, ensuring that there is constant increase in taper, i.e 0.02 mm per mm of instrument
STANDARDIZATION OF ENDODONTIC INSTRUMENTS

  • The colors have also been standardized. They are repeated every six instruments, with the exception of the first three of the series(Pink, gray, purple)

STANDARDIZATION OF ENDODONTIC INSTRUMENTS

MODIFICATIONS FROM INGLE’S STANDARDIZATION

MODIFICATIONS FROM INGLE’S STANDARDIZATION

  • An additional diameter measurement point at D3 is 3 mm from the tip of the cutting end of the instrument at D0 (Earlier it was D1) and D2 was designated as D16.
  • Tip angle of an instrument should be 75° ± 15°.
  • Greater taper instruments (0.04, 0.06, 0.08, 0.10, 0.12) have also been made available.
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