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Comparison of vibration characteristics of file systems for root canal shaping according to file length

Restorative Dentistry & Endodontics 2020년 45권 4호 p.51 ~ 51
박성준, 박세희, 조경모, 지효진, 이은혜, 김진우,
소속 상세정보
박성준 ( Park Seong-Jun ) - Gangneung-Wonju National University Department of Conservative Dentistry
박세희 ( Park Se-Hee ) - Gangneung-Wonju National University Department of Conservative Dentistry
조경모 ( Cho Kyung-Mo ) - Gangneung-Wonju National University Department of Conservative Dentistry
지효진 ( Ji Hyo-Jin ) - Gangneung-Wonju National University Department of Conservative Dentistry
이은혜 ( Lee Eun-Hye ) - Hanyang University Seoul Hospital Department of Conservative Dentistry
김진우 ( Kim Jin-Woo ) - Gangneung-Wonju National University Department of Conservative Dentistry

Abstract


Objectives: No studies have yet assessed vibration characteristics according to endodontic file length. Accordingly, the objective of the present study was to examine the vibration characteristics according to nickel-titanium file length and to compare these characteristics between different file systems.

Materials and Methods: A total of 45 root canal models were divided into 3 experimental groups (n = 15 each) based on the file system used (ProTaper Gold [PTG], ProTaper Next, or WaveOne Gold [WOG]). Each experimental group was further divided into 3 subgroups according to file length (21, 25, or 31 mm). An electric motor (X-SMART PLUS) was used in the experiment. For each file system, vibrations generated when using a size 25 file were measured and used to calculate the average vibration acceleration. The differences in vibrations were analyzed using 1-way analysis of variance and the Scheffe post hoc test with a confidence interval of 95%.

Results: In the PTG file system, significantly lower vibration acceleration was observed when using a 21-mm file than when using a 31-mm file. In the WOG file system, significantly stronger vibration acceleration was observed when using a 31-mm file than when using 21- or 25-mm files. Regardless of the file length, the WOG group exhibited significantly stronger vibration acceleration than the other 2 experimental groups.

Conclusions: In clinical practice, choosing a file with the shortest length possible could help reduce vibrations. Additionally, consideration should be given to vibrations that could be generated when using WOG files with reciprocating motion.

키워드

File length; ProTaper Gold; ProTaper Next; Vibration; WaveOne Gold

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