使用ProTaper Next、ProTaper Ultimate和R-Motion文件系统评估根管预备后的牙本质裂纹形成、牙尖挤压、未准备表面积。

IF 3.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of endodontics Pub Date : 2025-02-01 DOI:10.1016/j.joen.2024.11.014

Haider A. Ibrahim BDS , Ahmed H. Ali BDS, MSc, PhD (UK) , Francesco Mannocci MD, DDS, PhD, FHEA

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引用次数: 0

摘要

本研究评估并比较了ProTaper Next （PTN）、ProTaper Ultimate （PTU）和R-Motion （RM）文件系统在根管准备过程中产生的根尖挤压碎片、未准备管壁表面积和牙本质裂缝的数量。方法：将45颗上颌第一磨牙腭根均匀缩短至12mm。样本随机分为三组（n = 15/组），分别使用PTN、PTU和RM文件系统制备。研究者采用了迈尔斯和蒙哥马利改良的方法来复制人体的温度。碎片收集在小瓶中，并在仪器使用前后用灵敏天平称重。每个标本在制备过程中使用蒸馏水冲洗，使用侧通气针。用仪器测量前的重量减去仪器测量后的重量，以确定收集到的碎片的重量。使用Planmeca ProMax CBCT机在预备管前后进行CBCT扫描。使用Mimics Medical程序通过叠加术前和术后CBCT图像来计算未准备的管道表面积。在准备好之后，一个低速金刚石圆盘水平切割根部在3,6和9毫米的顶端。在数码显微镜下检查试样以检测裂纹的形成。采用单因素方差分析（ANOVA）和Tukey检验（HSD）进行统计学分析，差异均具有显著性水平。结果：三种整形锉在牙根尖挤出碎片数量和牙根裂纹数量上差异均无统计学意义（p < 0.05）。与PTN和RM相比，PTU制备的根管只有根尖三分之一的未准备表面积显著降低。结论：使用PTN， PTU和RM的器械产生相似数量的根尖挤压碎片和牙本质裂缝。PTU锉通过减少预备根管中未准备的表面积，在预备根尖三分之一根管中显示出更高的有效性。

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Assessment of Debris Apical Extrusion, Unprepared Surface Areas, and Dentinal Crack Formation after Root Canal Preparation Using ProTaper Next, ProTaper Ultimate, and R-Motion File Systems

Introduction

This study evaluated and compared the amount of apically extruded debris, unprepared wall surface areas, and dentinal crack formation resulting from root canal preparation using ProTaper Next (PTN), ProTaper Ultimate (PTU), and R-Motion (RM) file systems.

Methods

Forty-five palatal roots of maxillary first molars were shortened to a uniform length of 12 mm. The samples were divided randomly into 3 groups (n = 15/group) to be prepared using either PTN, PTU, and RM file systems. The investigator adopted modified Myers and Montgomery's approach to replicate the temperature of the human body. Debris was collected in vials and weighed before and after instrumentation with a sensitive balance. Every specimen was irrigated using distilled water during preparation, utilizing a side-vented needle. Weight before instrumentation was subtracted from weight after instrumentation to identify the weight of the collected debris. Cone-beam computed tomography (CBCT) scans were taken before and after canal preparation using a Planmeca ProMax CBCT machine. The unprepared canal surface area was calculated by superimposing preoperative and postoperative CBCT images using the Mimics Medical program. After preparation, a low-speed diamond disc horizontally sectioned the roots at 3, 6, and 9 millimeters from the apex. The specimens were examined under a digital microscope to detect crack formation. Statistical analysis was carried out using one-way (ANOVA) and Tukey (HSD) tests, with a significance level of P < .05.

Results

There was no statistically significant difference in the quantity of debris extruded apically and dentinal crack numbers among the 3 shaping files (P > .05). Only the apical third of root canals prepared by PTU displayed a significantly lower unprepared surface area compared to PTN and RM.

Conclusions

Instrumentation with PTN, PTU, and RM yielded similar amounts of apically extruded debris and dentinal cracks. The PTU files demonstrated higher effectiveness in preparing the apical third by reducing the unprepared surface area in the prepared root canal.

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来源期刊

Journal of endodontics 医学-牙科与口腔外科

CiteScore

8.80

自引率

9.50%

发文量

224

审稿时长

42 days

期刊介绍： The Journal of Endodontics, the official journal of the American Association of Endodontists, publishes scientific articles, case reports and comparison studies evaluating materials and methods of pulp conservation and endodontic treatment. Endodontists and general dentists can learn about new concepts in root canal treatment and the latest advances in techniques and instrumentation in the one journal that helps them keep pace with rapid changes in this field.