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KMID : 0362720160540080640
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Journal of the Korean Dental Association
2016 Volume.54 No. 8 p.640 ~ p.650
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Prevention and Solution of the Fracture of Nickel-Titanium Endodontic Instruments
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Kim Hyeon-Cheol
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Abstract
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Nickel-Titanium (NiTi) rotary instruments have brought a big step toward “efficient” practice of endodontic procedure. The
rotary files help clinicians to reduce their working time and also increase the clinical success rate with minimal procedural errors.
However, NiTi instruments still have a few drawbacks including unpredictable fatigue fracture. Clinicians may reduce the
potential risk of instruments fracture by following some clinical guidelines for rotary instruments. In some clinical cases of
instruments fracture, we may try to remove the instruments’ fragments or bypass the fragment to reach the apical canal. In some limited cases, the fractured instruments’ fragments would not jeopardize the clinical prognosis of root canal treatment. Nevertheless, it is impossible to be overemphasized that the prevention of file fracture is much easier than the removal of fracture fragment. Clinicians need to understand the fracture mechanisms and, in clinic, need to discard the used instruments timely
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KEYWORD
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Fracture, Fragment removal, Nickel-Titanium instruments, Prognosis, Root canal treatment
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