Smear layer removal efficacy of different irrigation techniques in conservatively instrumented root canals

IF 3.4 3区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Journal of Dental Sciences Pub Date : 2024-07-01 DOI:10.1016/j.jds.2024.01.008
Sota Mochizuki, Satoshi Watanabe, Jiayi Liu, Takashi Okiji
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Abstract

Background/purpose

Establishing effective irrigation methods is warranted to ensure the predictability of minimally invasive root canal instrumentation. This study aimed to compare the smear layer removal efficacy of different irrigation techniques in root canals instrumented with TruNatomy nickel-titanium rotary instruments.

Materials and methods

Experiment 1: Extracted human mandibular incisors were instrumented using TruNatomy Shaping Files up to Small (#20/0.04), Prime (#26/0.04), or Medium (#36/0.03) (n = 17, each) and irrigated with EDTA, NaOCl, and again with EDTA using syringe irrigation (SI). Experiment 2: Extracted mandibular incisors were instrumented using TruNatomy Small and irrigated with EDTA and NaOCl as in Experiment 1, using (1) conventional laser-activated irrigation (LAI) with an erbium-doped yttrium aluminum garnet laser unit at 30 mJ/10 Hz (LAI 30/10) or 70 mJ/20 Hz (LAI 70/20), (2) photon-induced photoacoustic streaming (PIPS) (20 mJ/15 Hz), (3) ultrasonic-activated irrigation, or (4) SI (n = 13 each). Five additional canals served as negative controls (no irrigation). The smear layer on the canal wall was scored under scanning electron microscopy.

Results

In Experiment 1, the TruNatomy Small group exhibited significantly higher smear layer scores compared to the other groups in the apical and middle thirds. In Experiment 2, the LAI 70/20 and PIPS groups demonstrated significantly lower smear layer scores compared to the LAI 30/10 and SI groups in the apical third.

Conclusion

Conservative instrumentation using the TruNatomy Small reduced the cleaning efficacy of irrigation. However, PIPS performed satisfactory for smear layer removal without injury to the root canal wall.

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不同灌洗技术在保守器械根管中去除涂膜层的效果
背景/目的为了确保微创根管器械治疗的可预测性,必须建立有效的灌洗方法。本研究旨在比较使用 TruNatomy 镍钛旋转器械对根管进行器械治疗时,不同灌洗技术去除涂抹层的效果。材料和方法实验 1:使用 TruNatomy 成型锉对拔出的人类下颌切牙进行器械治疗,分为小号(#20/0.04)、中号(#26/0.04)或中号(#36/0.03)(n = 17,每种),并使用 EDTA、NaOCl 灌洗,然后使用注射器灌洗(SI)再次使用 EDTA 灌洗。实验 2:使用 TruNatomy Small 仪器拔出下颌切牙,并使用 EDTA 和 NaOCl 进行灌洗,方法与实验 1 相同,使用 (1) 传统激光激活灌洗(LAI),使用掺铒钇铝石榴石激光装置,频率为 30 mJ/10 Hz(LAI 30/10)或 70 mJ/20 Hz(LAI 70/20)、(2) 光子诱导光声流(PIPS)(20 mJ/15 Hz),(3) 超声波激活灌洗,或 (4) SI(各 13 人)。另外五条管作为阴性对照(无灌洗)。结果在实验 1 中,与其他组相比,TruNatomy Small 组在顶端和中间三分之一处的涂片层得分明显较高。结论使用 TruNatomy Small 的保守器械降低了冲洗的清洁效果。但是,PIPS 在去除涂抹层方面的效果令人满意,而且不会损伤根管壁。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Dental Sciences
Journal of Dental Sciences 医学-牙科与口腔外科
CiteScore
5.10
自引率
14.30%
发文量
348
审稿时长
6 days
期刊介绍: he Journal of Dental Sciences (JDS), published quarterly, is the official and open access publication of the Association for Dental Sciences of the Republic of China (ADS-ROC). The precedent journal of the JDS is the Chinese Dental Journal (CDJ) which had already been covered by MEDLINE in 1988. As the CDJ continued to prove its importance in the region, the ADS-ROC decided to move to the international community by publishing an English journal. Hence, the birth of the JDS in 2006. The JDS is indexed in the SCI Expanded since 2008. It is also indexed in Scopus, and EMCare, ScienceDirect, SIIC Data Bases. The topics covered by the JDS include all fields of basic and clinical dentistry. Some manuscripts focusing on the study of certain endemic diseases such as dental caries and periodontal diseases in particular regions of any country as well as oral pre-cancers, oral cancers, and oral submucous fibrosis related to betel nut chewing habit are also considered for publication. Besides, the JDS also publishes articles about the efficacy of a new treatment modality on oral verrucous hyperplasia or early oral squamous cell carcinoma.
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