Effects of ultrasonics and trephine burs on dentinal microcrack formation during broken instrument removal procedures: A micro-CT analysis

IF 1.3 4区医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Australian Endodontic Journal Pub Date : 2023-11-24 DOI:10.1111/aej.12820

Kadriye Özdayi DDS, Sehnaz Yilmaz DDS, PhD, Aysin Dumani DDS, PhD, Oguz Yoldas DDS, PhD

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引用次数: 0

Abstract

The objective of this study was to compare the effects of ultrasonic and trephine burs on microcrack formation during the removal of broken instruments, utilising micro-computed tomography (Micro-CT). Twenty-five extracted human mandibular molars were used for this study. The hand files were fractured into the mesiobuccal canal, except in the control group. In the ultrasonic group (n = 10), ultrasonic tips were used to retrieve the instrument, while in the trephine group (n = 10), trephine burs (Meitrac, Meisinger) and an extractor device were utilised. For the control group (n = 5), only staging platform was prepared. After the removal procedures, micro-CT images were obtained from the specimens. The chi-squared test was used to analyse the data, and significance was considered to be p < 0.05. Overall, 15 736 cross sections were analysed. No significant differences were found between control and experimental groups. Removal of broken instruments with trephine burs caused significantly more dentinal microcracks compared with ultrasonics (p = 0.016).

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超声和钻环对牙本质微裂纹形成的影响:显微ct分析。

本研究的目的是利用微型计算机断层扫描(Micro-CT)，比较超声和环钻在去除破损器械过程中对微裂纹形成的影响。25颗拔除的人类下颌磨牙用于本研究。除对照组外，其余手锉均骨折入中颊管。超声组(n = 10)采用超声针尖取出器械，环钻组(n = 10)采用环钻(Meitrac, Meisinger)和拔除器。对照组(n = 5)只制作分期平台。去除后，从标本中获得显微ct图像。采用卡方检验对数据进行分析，认为显著性为p

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

Australian Endodontic Journal DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

3.50

自引率

6.20%

发文量

审稿时长

>12 weeks

期刊介绍： The Australian Endodontic Journal provides a forum for communication in the different fields that encompass endodontics for all specialists and dentists with an interest in the morphology, physiology, and pathology of the human tooth, in particular the dental pulp, root and peri-radicular tissues. The Journal features regular clinical updates, research reports and case reports from authors worldwide, and also publishes meeting abstracts, society news and historical endodontic glimpses. The Australian Endodontic Journal is a publication for dentists in general and specialist practice devoted solely to endodontics. It aims to promote communication in the different fields that encompass endodontics for those dentists who have a special interest in endodontics.