Reciproc Blue、ProTaper Gold、ProTaper NEXT和Reciproc镍钛旋转器械导致的牙本质根缺陷发生率。

Incidence of Dentinal Root Defects Caused by RECIPROC Blue, ProTaper Gold, ProTaper NEXT and RECIPROC Nickel Titanium Rotary Instruments.

作者信息

Hussien Salsabeil W, Al-Gharrawi Hikmet A

机构信息

Department of Conservative Dentistry, Al-Mustansiriyah University/College of Dentistry, Baghdad, Iraq, Phone: +96407706148290, e-mail:

Department of Conservative Dentistry, Al-Mustansiriyah University/College of Dentistry, Baghdad, Iraq.

出版信息

J Contemp Dent Pract. 2019 Mar 1;20(3):291-297.

PMID:31204320

Abstract

AIM

This study was conducted to measure and compare the incidence of dentinal defects caused by (RECIPROC blue, ProTaper Gold, ProTaper NEXT and RECIPROC) nickel titanium (NiTi) rotary instruments.

MATERIALS AND METHODS

Seventy-five palatal roots of freshly extracted human maxillary first molars were used in this study. The total samples were randomly divided into five groups. Each group contained 15 samples (N = 15): group I: single file RECIPROC system, group II: ProTaper Next system, group III: ProTaper GOLD system, group IV: single file RECIPROC blue system and Group V: control group (No preparation). Root canal instrumentation were carried out according to manufacturer's instructions for each instrumentation system to # 40 apical size. Each root sample was sectioned horizontally at 2 mm, 4.5 mm and 7 mm, respectively from the apex. All root sections were observed under a stereomicroscope at 25X magnification.

RESULTS

The roots prepared by Reciproc showed the highest incidence of dentinal defects followed by ProTaper NEXT, ProTaper Gold then RECIPROC blue group which showed the lowest incidence of dentinal defects. The data obtained were analyzed statistically using Fisher's exact test at or equal to 5% significance levels. Fisher's exact test revealed that RECIPROC groups had a significant difference when compared with RECIPROC blue ( ≤ 0.01) and with ProTaper Gold ( ≤0.05) groups. While, other comparisons between each pair of groups revealed a non-significant difference between groups ( > 0.05). Regarding dentinal defects at different levels (apical, middle, coronal), Fisher's exact test showed that there was a non-significant difference in the incidence of dentinal defects when comparing among different levels in the same group or when comparing among different groups at the same level ( > 0.05).

CONCLUSION

all experimental groups showed dentinal defects while no dentinal defects were observed in the negative control group.

CLINICAL SIGNIFICANCE

the potential of root fracture is reduced using more flexible Ni Ti rotary instruments.

摘要

目的

本研究旨在测量和比较（Reciproc blue、ProTaper Gold、ProTaper NEXT和Reciproc）镍钛（NiTi）旋转器械导致的牙本质缺陷发生率。

材料与方法

本研究使用了75颗新鲜拔除的人类上颌第一磨牙的腭根。将全部样本随机分为五组。每组包含15个样本（N = 15）：第一组：单支锉Reciproc系统；第二组：ProTaper Next系统；第三组：ProTaper GOLD系统；第四组：单支锉Reciproc blue系统；第五组：对照组（未预备）。根据每个器械系统的制造商说明进行根管预备至根尖尺寸#40。每个牙根样本分别在距根尖2mm、4.5mm和7mm处水平剖切。所有根切片在25倍放大率的体视显微镜下观察。

结果

Reciproc预备的牙根显示出牙本质缺陷发生率最高，其次是ProTaper NEXT、ProTaper Gold，然后是Reciproc blue组，其显示出牙本质缺陷发生率最低。使用Fisher精确检验在显著性水平等于或小于5%时对获得的数据进行统计学分析。Fisher精确检验显示，Reciproc组与Reciproc blue组（≤0.01）和ProTaper Gold组（≤0.05）相比有显著差异。而每组之间的其他比较显示组间无显著差异（>0.05）。关于不同水平（根尖、中部、冠部）的牙本质缺陷，Fisher精确检验显示，在同一组内不同水平之间比较或在同一水平的不同组之间比较时，牙本质缺陷发生率无显著差异（>0.05）。