4种镍钛旋转器械在模拟根管中的塑形能力比较。

A comparison of the shaping abilities of 4 nickel-titanium rotary instruments in simulated root canals.

作者信息

Yun Hyung-Hwa, Kim Sung Kyo

机构信息

Department of Conservative Dentristry, School of Dentistry, Kyungpook National University, Daegu, Korea.

出版信息

Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2003 Feb;95(2):228-33. doi: 10.1067/moe.2003.92.

DOI:10.1067/moe.2003.92

PMID:12582365

Abstract

OBJECTIVE

The purpose of this study was to compare the root canal shaping abilities of 4 nickel-titanium rotary instruments.

STUDY DESIGN

ProFile, GT Rotary, Quantec, and ProTaper files were used to instrument 48 simulated curved root canals in plastic blocks with the crown-down technique. One operator prepared all the canals until reaching an apical canal size of #30. The instrumentation time, changes of canal dimension and curvature, canal aberration, and instrument deformation were evaluated. Data were analyzed by using one-way analysis of variance followed by the Duncan multiple range test.

RESULTS

The ProTaper took significantly less instrumentation time, removed more canal wall (especially at the inner side of the canal curve), lessened the canal curvature, and induced more instrument deformation than did the other instruments.

CONCLUSION

Although ProTaper files cut more canal wall more quickly than the other instruments in the curved canal, they were also the instruments that most frequently became deformed.

摘要

目的

本研究旨在比较4种镍钛旋转器械的根管预备能力。

研究设计

使用Profile、GT Rotary、Quantec和ProTaper锉，采用冠向深入技术对塑料块中的48个模拟弯曲根管进行预备。由一名操作者预备所有根管，直至达到根尖根管尺寸为#30。评估预备时间、根管尺寸和弯曲度的变化、根管偏差及器械变形情况。数据采用单因素方差分析，随后进行邓肯多重极差检验。