関連する実験動画

Updated: Jan 24, 2026

The Establishment of a Murine Mandibular Molar Extraction Socket Healing Model

The Establishment of a Murine Mandibular Molar Extraction Socket Healing Model

Published on: January 13, 2023

歯冠遠心部モルを用いた残存充填材除去におけるレーザー活性化 vs 音波活性化洗浄の比較：Micro-CT研究

Yuhong Lin¹, Fabricio Teixeira¹, Jianing He¹

¹Department of Endodontics, Texas A&M College of Dentistry, 3302 Gaston Ave, Dallas, TX, 75246.

Journal of endodontics

|January 22, 2026

要旨

Introduction:

Advanced irrigation plays a crucial role in nonsurgical retreatment cases, as these procedures require the removal of existing obturation materials while preserving dentin. The aim of this study was to compare the effectiveness of laser-activated versus sonic-activated irrigation in removing residual obturation material in the mesial canals of mandibular molars with isthmuses during non-surgical root canal retreatment.

Methods:

Forty mesial canals of extracted mandibular molars were instrumented and obturated with gutta-percha and a bioceramic sealer. Retretments was performed using rotary instruments, followed by a final irrigation protocol consisting of 2.5% NaOCl, 17% EDTA, and a final rinse of 2.5% NaOCl using either sonic-activated or laser-activated irrigation. Micro-computed tomography scans were obtained before and after final irrigation. The volume of obturation material was measured to calculate the median percentage of remaining material in each group.

Results:

The laser-activated irrigation group showed a significantly lower median percentage of remaining filling material than the sonic group (73.9% vs. 93.8%, p = 0.0165). However, neither irrigation protocol completely eliminates residual obturation material from the canals.

Conclusion:

Laser-activated irrigation was more effective at removing remaining obturation material compared to sonic-activated irrigation.

キーワード:

根管治療再治療洗浄レーザー活性化洗浄音波活性化洗浄 Micro-CT

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