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使用反向旋转或往复运动的WaveOne预备弯曲根管后危险区的改变

Alterations of the Danger Zone after Preparation of Curved Root Canals Using WaveOne with Reverse Rotation or Reciprocation Movements.

作者信息

Shantiaee Yazdan, Dianat Omid, Paymanpour Payam, Nahvi Golnaz, Ketabi Mohammad Ali, Kolahi Ahari Golbarg

机构信息

Iranian Center for Endodontic Research, Research Institute of Dental sciences, Department of Endodontics, Dental School , Shahid Beheshti University of Medical Sciences, Tehran, Iran ;

Dental Student, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran ;

出版信息

Iran Endod J. 2015 Summer;10(3):156-61. doi: 10.7508/iej.2015.03.002. Epub 2015 Jul 1.

DOI:10.7508/iej.2015.03.002
PMID:26213536
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4509121/
Abstract

INTRODUCTION

The aim of this study was to compare the changes that occur in the danger zone (DZ) after preparation of curved mesiobuccal (MB) canals of mandibular first molars with WaveOne instruments in two different movements [reciprocation (RCP) and counter-clockwise rotation (CCWR)] by means of cone-beam computed tomography (CBCT).

METHODS AND MATERIALS

MB canals of 30 mandibular molars were randomly divided into 2 groups (n=15); WaveOne/RCP and WaveOne/CCWR. Pre- and post-instrumentation CBCT images were assessed for changes in the dentin thickness in DZ (2 and 4 mm below the highest point of the root furcation) in both groups. Data was analyzed using the repeated measures ANOVA test.

RESULTS

There was no statistically significant difference between two experimental groups in terms of remaining dentin thickness at 2 and 4 mm levels below the highest point of the furcation (P>0.05).

CONCLUSION

The efficacy of WaveOne instrument on changes of the dentin thickness in the DZ was not affected by different file movements.

摘要

引言

本研究的目的是通过锥形束计算机断层扫描（CBCT），比较使用WaveOne器械以两种不同运动方式[往复运动（RCP）和逆时针旋转（CCWR）]预备下颌第一磨牙近中颊（MB）弯曲根管后，危险区（DZ）发生的变化。

方法和材料

30颗下颌磨牙的MB根管随机分为2组（n = 15）；WaveOne/RCP组和WaveOne/CCWR组。对两组在器械操作前后的CBCT图像评估DZ（根分叉最高点下方2和4毫米处）牙本质厚度的变化。使用重复测量方差分析检验分析数据。

结果

在根分叉最高点下方2和4毫米处，两个实验组在剩余牙本质厚度方面无统计学显著差异（P>0.05）。

结论

WaveOne器械对DZ牙本质厚度变化的疗效不受不同锉运动方式的影响。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c8e/4509121/2b30c93598fd/iej-10-156-i002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c8e/4509121/4c5e26af0633/iej-10-156-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c8e/4509121/ea32b31aa8b1/iej-10-156-i001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c8e/4509121/2b30c93598fd/iej-10-156-i002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c8e/4509121/4c5e26af0633/iej-10-156-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c8e/4509121/ea32b31aa8b1/iej-10-156-i001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c8e/4509121/2b30c93598fd/iej-10-156-i002.jpg

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