Int J Stomatol

Inter J Stomatol ›› 2013, Vol. 40 ›› Issue (2): 199-201.doi: 10.7518/gjkq.2013.02.018

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Stress distribution of Ni-Ti rotary instrument and the mechanical characters of tooth root during preparation

Duan Yanyan, Su Qin.   

  1. Dept. of Conservative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2012-08-12 Revised:2012-11-29 Online:2013-03-01 Published:2013-03-01
  • Contact: Su Qin， Tel： 028-85501439

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Abstract:

The prospect of Ni-Ti rotary instruments in root canal therapy especially small bending and molar application is quite bright, because of its good flexible property. But instruments separation and postoperative root fracture are still common problems in clinical practice. In recent years, many scholars have discussed the stress distribution of Ni-Ti rotary instrument and the mechanical characters of tooth root during preparation. This review focused on the clinical research recently.

Key words: Ni-Ti rotary instrument, stress analysis, instrument fracture, root fracture


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