Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
권호 표지
DOI QR코드

DOI QR Code

Comparison vibration characteristics of several wireless endodontic handpieces

여러 근관치료용 무선 핸드피스의 진동양상 비교

  • Lee, Bo-Kyung (Department of Conservative Dentistry, College of Dentistry, Gangneung-Wonju National University) ;
  • Lee, Yoon (Department of Conservative Dentistry, College of Dentistry, Gangneung-Wonju National University) ;
  • Park, Se-Hee (Department of Conservative Dentistry, College of Dentistry, Gangneung-Wonju National University) ;
  • Cho, Kyung-Mo (Department of Conservative Dentistry, College of Dentistry, Gangneung-Wonju National University) ;
  • Kim, Jin-Woo (Department of Conservative Dentistry, College of Dentistry, Gangneung-Wonju National University)
  • 이보경 (강릉원주대학교 치과대학 치과보존학교실) ;
  • 이윤 (강릉원주대학교 치과대학 치과보존학교실) ;
  • 박세희 (강릉원주대학교 치과대학 치과보존학교실) ;
  • 조경모 (강릉원주대학교 치과대학 치과보존학교실) ;
  • 김진우 (강릉원주대학교 치과대학 치과보존학교실)
  • Received : 2022.04.01
  • Accepted : 2022.05.20
  • Published : 2022.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

Purpose: Wireless endodontic handpieces (WEH) are widely used in dental clinics due to their convenience and portability. This study aimed to compare the vibration magnitudes and patterns generated by five WEH. Materials and Methods: Vibration acceleration of five WEH (X-Smart IQ, E connect S, Endo A Class, ENDOIT, and TRAUS ENDO) in the rotary and reciprocating motion was measured with accelerometer The average vibration acceleration was analyzed using the t-test, Welch's ANOVA test, and Dunnett T3 test at P < 0.05. Results: In all WEH, the average vibration acceleration in reciprocating motion was significantly higher than that in rotary motion (P < 0.001). In rotary motion, repeated vibration graphs of constant amplitude were obtained without sudden changes in the magnitude of vibration, and the average vibration acceleration value was high in the order of X Smart IQ, Endo A Class, ENDOIT, E Connect S, and TRAUS ENDO (P < 0.001), there was no statistically significant difference between X Smart IQ and Endo A Class. In reciprocating motion, a vibration graph was obtained in which large amplitude peaks appear at specific points within one cycle are repeated. The average vibration acceleration value was highest in the order of X Smart IQ, E Connect S, Endo A class, ENDOIT, and TRAUS ENDO (P < 0.001). Conclusion: Regardless of the type of WEH, greater vibration occurred in the reciprocating motion than in the rotary motion (P < 0.001). In the reciprocating motion, there was a difference in vibration for all handpieces (P < 0.001).

목적: 여러 근관치료용 무선 핸드피스에서 발생되는 진동의 크기와 양상을 비교해 보고자 한다. 연구 재료 및 방법: 클램프로 고정시킨 5개의 근관치료용 무선 핸드피스(X Smart IQ, E Connect S, Endo A Class, ENDOIT, TRAUS ENDO)의 헤드부분에 가속도계를 이용하여 회전운동과 왕복운동방식으로 동작할 때 핸드피스 자체에서 발생하는 진동가속도를 측정하였다. 결과: 모든 근관치료용 무선 핸드피스에서 회전운동보다 왕복운동에서의 평균진동가속도가 유의하게 높게 나타났다(P < 0.001). 회전운동에서는 급격한 진동의 크기 변화 없이 일정한 진폭의 반복적인 진동그래프가 얻어졌으며, 평균진동 가속도 값은 X Smart IQ, Endo A Class, ENDOIT, E Connect S, TRAUS ENDO 순이었고(P < 0.001), X Smart IQ와 Endo A Class 사이에는 통계적으로 유의한 차이가 없었다. 왕복운동에서는 한 주기 안에 특정 지점에서 큰 진폭의 피크가 나타나는 양상의 진동그래프가 얻어졌으며, 평균진동가속도 값은 X Smart IQ, E Connect S, Endo A class, ENDOIT, TRAUS ENDO 순이었다(P < 0.001). 결론: 무선 근관치료용 핸드피스 종류에 관계없이 회전운동보다 왕복운동에서 더 큰 진동이 발생하였다. 왕복운동에서는 모든 핸드피스에서 진동의 차이가 있었다(P < 0.001).

Keywords

References

  1. Giraki M, Bauer A, Barthel C, Ruttermann S, Gerhardt-Szep S. Problems with a cordless endodontic hand piece when preparing severely curved root canals. J Dent Probl Solut 2016;3:040-4.
  2. Jain P. Rotary instruments: importance of speed and torque. In: Jain P, editor. Current therapy in endodontics. Ames; John Wiley & Sons Inc.; 2016. p. 30-2.
  3. Hargreaves KM, Berman LH. Cohen's pathway of the pulp. 11th ed. St. Louis; Elsevier; 2016. p. 233.
  4. McCombs G, Russell DM. Comparison of corded and cordless handpieces on forearm muscle activity, procedure time and ease of use during simulated tooth polishing. J Dent Hyg 2014;88:386-93.
  5. Park SH, Seo HW, Hong CU. An evaluation of rotational stability in endodontic electronic motors. J Korean Acad Conserv Dent 2010;35:246-56. https://doi.org/10.5395/JKACD.2010.35.4.246
  6. Park KH, Yi KH. Voltage balancing circuit for Liion battery system. J Korea Indust Inform Syst Res 2013;18:73-80.
  7. Newland DE, Ungar EE. Mechanical vibration analysis and computation. J Acoust Soc Am 1990;88:2506. https://doi.org/10.1121/1.400056
  8. Vadhana S, SaravanaKarthikeyan B, Nandini S, Velmurugan N. Cyclic fatigue resistance of race and Mtwo rotary files in continuous rotation and reciprocating motion. J Endod 2014;40:995-9. https://doi.org/10.1016/j.joen.2013.12.010
  9. Jeon YJ, Kim JW, Cho KM, Park SH, Chang HS. Vibration characteristics of endodontic motors with different motion: reciprocation and conventional rotation. J Korean Dent Assoc 2014;52:734-43. https://doi.org/10.22974/JKDA.2014.52.12.004
  10. Finley WR, Hodowanec MM, Holter WG. An analytical approach to solving motor vibration problems. Available from: https://www.maintenance.org/fileSendAction/fcType/0/fcOid/399590942964504823/filePointer/399590942964856169/fodoid/399590942964856167/Analytical_Approach_to_Solving_Motor_Vibration_Problems.pdf (updated 2021 Jun 15).
  11. Yared G. Canal preparation using only one Ni-Ti rotary instrument: preliminary observations. Int Endod J 2008;41:339-44. https://doi.org/10.1111/j.1365-2591.2007.01351.x
  12. Park SJ, Park SH, Cho KM, Ji HJ, Lee EH, Kim JW. Comparison of vibration characteristics of file systems for root canal shaping according to file length. Restor Dent Endod 2020;45:e51. https://doi.org/10.5395/rde.2020.45.e51
  13. Choi DM, Kim JW, Park SH, Cho KM, Kwak SW, Kim HC. Vibrations generated by several nickeltitanium endodontic file systems during canal shaping in an ex vivo model. J Endod 2017;43:1197-200. https://doi.org/10.1016/j.joen.2017.03.010
  14. Poole RL, Lea SC, Dyson JE, Shortall AC, Walmsley AD. Vibration characteristics of dental highspeed turbines and speed-increasing handpieces. J Dent 2008;36:488-93. https://doi.org/10.1016/j.jdent.2008.03.006
  15. Castellini P, Martarelli M, Tomasini E. Laser doppler vibrometry: Development of advanced solutions answering to technology's needs. Mechanical Systems and Signal Processing 2006;20:1265-85. https://doi.org/10.1016/j.ymssp.2005.11.015
  16. Park SR, Park SH, Cho KM, Kim JW, Kim HC. Patient discomfort levels during instrumentation procedure using nickel-titanium files with different kinetic movements. Aust Endod J 2021 Nov 23. doi: 10.1111/aej.12590.[Online ahead of print]
  17. Kim SG. Musculoskeletal Disorders by Vibration. Korean Industrial Health Association 2017;355:34-47.