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KMID : 0362320120370040201
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Journal of Korean Academy of Operative Dentistry
2012 Volume.37 No. 4 p.201 ~ p.206
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A survey of experience-based preference of Nickel-Titanium rotary files and incidence of fracture among general dentists
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Lee Woo-Cheol
Song Min-Ju
Kim Eui-Seong
Lee Hyo-Jin
Kim Hyeon-Cheol
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Abstract
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Objectives: The purpose was to investigate the preference and usage technique of NiTi rotary instruments and to retrieve data on the frequency of re-use and the estimated incidence of file separation in the clinical practice among general dentists.
Materials and Methods: A survey was disseminated via e-mail and on-site to 673 general dentists. The correlation between the operator's experience or preferred technique and frequency of re-use or incidence of file fracture was assessed.
Results: A total of 348 dentists (51.7%) responded. The most frequently used NiTi instruments was ProFile (39.8%) followed by ProTaper. The most preferred preparation technique was crown-down (44.6%). 54.3% of the respondents re-used NiTi files more than 10 times. There was a significant correlation between experience with NiTi files and the number of reuses (p = 0.0025). 54.6% of the respondents estimated experiencing file separation less than 5 times per year. The frequency of separation was significantly correlated with the instrumentation technique (p = 0.0003).
Conclusions: A large number of general dentists in Korea prefer to re-use NiTi rotary files. As their experience with NiTi files increased, the number of re-uses increased, while the frequency of breakage decreased. Operators who adopt the hybrid technique showed less tendency of separation even with the increased number of re-use.
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KEYWORD
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Crown-down technique, Fracture incidence, Hybrid technique, Nickel-titanium rotary file, Preference
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