[ Best Paper of This Month ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 32, No. 5, pp.251-259

ISSN: 2508-5107 (Online)

Print publication date 15 Oct 2023

Received 05 Sep 2023 Revised 26 Sep 2023 Accepted 27 Sep 2023

DOI: https://doi.org/10.7735/ksmte.2023.32.5.251

마이크로 기포를 포함한 근관 세척 유동 형태의 수치해석 평가

김준현^a ; 이찬우^b ; 이인환^c ; 성재용^d^{, *}

Numerical Evaluation of Flow Pattern for Root Canal Irrigation Including Microbubbles

Joon Hyun Kim^a ; Chan U Lee^b ; Inwhan Lee^c ; Jaeyong Sung^d^{, *}

aNDT Research Center, Seoul National University of Science & Technology
bUndergraduate Student, Department of Mechanical and Automotive Engineering, Seoul National University of Science & Technology
cB&L Biotech
dDepartment of Mechanical and Automotive Engineering, Seoul National University of Science & Technology

Correspondence to: ^*Tel.: +82-2-970-6398 E-mail address: jysung@seoultech.ac.kr (Jaeyong Sung).

Abstract

This study has the initial purpose of pursuing the efficiency of endodontic treatment by applying microbubbles to a NaOCl cleaning solution. The effects of average apical pressure and wall shear stress were found to determine the cleaning quality of the root canal. Using a G-30 needle and a flow rate of 0.26 ml/s, met acceptance criteria in apical pressure. In the straight root canal shape, the side-vent type enhanced the smear layer removal area more effectively attributed to the wall shear stress. In curved root canals, the flat open type was beneficial in generating wall shear stress relative to the curvature of the curved canal. In the fluidity of the cleaning solution according to the bubble dissolution, a slight change appeared in the average apical pressure. Due to the G-30 needle's small size in bubble flow, it is imperative to adopt a new Reynolds number when applying microbubbles.

Keywords:

Root canal, Irrigation needle, Endodontic treatment, Air volume fraction, Effective working length

Acknowledgments

이 연구는 2022년 한국연구재단 개인기초연구사업(기본연구) 과제번호 2022R1F1A1071016의 연구비 지원으로 수행되었습니다.

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Joon Hyun Kim

Research Professor in NDT Research Center, Seoul National University of Science and Technology. His research interest is Tribology and Thermal Fluid.

E-mail: joonk61@seoultech.ac.kr

Chan U Lee

Undergraduate Student in the Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology. His research interest is Biomechanics and Fluid Dynamics.

E-mail: chanw158256@gmail.com

Inwhan Lee

CEO, BNL Biotech. His research interest is Endodontic Treatment in Root Canal.

E-mail: superendo@bnlbio.com

Jaeyong Sung

Professor in the Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology. His research interest is Flow Visualization.

E-mail: jysung@seoultech.ac.kr