Effects of increasing instrument size and taper on the disinfection and shaping of mandibular incisors

IF 1.3 4区 医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Australian Endodontic Journal Pub Date : 2024-05-08 DOI:10.1111/aej.12851
Ana Flávia Almeida Barbosa DDS, MSc, PhD, Emmanuel João Nogueira Leal Silva DDS, MSc, PhD, Marco Aurélio Versiani DDS, MSc, PhD, Carolina Oliveira Lima DDS, MSc, PhD, Letícia de Almeida Pereira Reis Oliveira DDS, Graziela dos Santos Massa DDS, MSc, Thayná Cristine da Silva Eustáquio DDS, MSc, Ricardo Tadeu Lopes PhD, Luciana Moura Sassone DDS, MSc, PhD
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Abstract

This study assessed canal preparation effects on disinfection and dentin preservation. Thirty mandibular incisors were paired into two experimental groups (n = 10). Following contamination, the initial microbial sample was collected. Instruments 30/0.03 (Group 1) and 30/0.05 (Group 2) were employed and a second sample was obtained. Canals were enlarged using instruments 40/0.03 and 40/0.05, respectively, and a third sample was collected. Final irrigation was performed, and sample S4 obtained. A final scan evaluated volume, surface area, unprepared areas, removed dentin and dentin thickness. Data were analysed using Student t-test, Mann–Whitney, Kruskal–Wallis and Dunn tests. A significant difference was observed between S1 and other time points (p < 0.05). Comparison between groups showed no differences in bacterial loads and in the percentage of microbial reduction (p > 0.05). Group 2 exhibited greater reduction in dentin thickness than group 1 in the mesial aspect of the root (p < 0.05). Instrument 30/0.03 might provide effective disinfection and safety during mandibular incisors canal preparation.

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增加器械尺寸和锥度对下颌切牙消毒和塑形的影响。
本研究评估了牙管预备对消毒和牙本质保存的影响。将 30 颗下颌门牙分成两个实验组(n = 10)。污染后,收集初始微生物样本。使用 30/0.03 号器械(第 1 组)和 30/0.05 号器械(第 2 组)采集第二份样本。分别使用 40/0.03 和 40/0.05 号器械扩大牙道,采集第三份样本。最后进行冲洗,获得 S4 样本。最后的扫描评估了体积、表面积、未制备区域、去除的牙本质和牙本质厚度。数据分析采用学生 t 检验、曼-惠特尼检验、Kruskal-Wallis 检验和 Dunn 检验。在 S1 和其他时间点之间观察到了明显的差异(P 0.05)。在牙根中侧,第 2 组的牙本质厚度比第 1 组减少得更多(p.0.05)。
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来源期刊
Australian Endodontic Journal
Australian Endodontic Journal DENTISTRY, ORAL SURGERY & MEDICINE-
CiteScore
3.50
自引率
6.20%
发文量
99
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.
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