S-Space College of Dentistry/School of Dentistry (치과대학/치의학대학원) Dept. of Dentistry (치의학과) Journal Papers (저널논문_치의학과)
A survey of experience-based preference of Nickel- Titanium rotary files and incidence of fracture among general dentists
- Lee, WooCheol; Song, Minju; Kim, Euiseong; Lee, Hyojin; Kim, Hyeon-Cheol
- Issue Date
- RESTORATIVE DENTISTRY & ENDODONTICS Vol.37 No.4, pp. 201-206
- 의약학; Crown-down technique; Fracture incidence; Hybrid technique; Nickel-titanium
rotary file; Preference
- 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 crowndown
(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.