在模拟弯曲根管中，将五种不同的旋转镍钛器械与不锈钢手动器械的根管预备能力和安全性进行比较。
Shaping ability and safety of five different rotary nickel-titanium instruments compared with stainless steel hand instrumentation in simulated curved root canals.
作者信息
Schirrmeister Jörg F, Strohl Christian, Altenburger Markus J, Wrbas Karl-Thomas, Hellwig Elmar
机构信息
Department of Operative Dentistry and Periodontology, Albert-Ludwigs-University of Freiburg, Freiburg, Germany.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2006 Jun;101(6):807-13. doi: 10.1016/j.tripleo.2005.06.014. Epub 2006 Feb 28.
OBJECTIVE
To compare the shaping ability and safety of engine-driven FlexMaster, GT Rotary, ProFile, ProTaper, and RaCe rotary instrumentation and Hedström hand instrumentation in simulated root canals.
STUDY DESIGN
One hundred fifty simulated colored root canals with a curvature of 20 degrees and a radius of 10 mm were randomly distributed among 6 groups of 25 specimens each. After preparation to apical size 30 the area of remaining color on the canal wall indicating unprepared areas was measured in mm2 using image analyzer software.
RESULTS
Specimens treated with RaCe left least areas of remaining color compared to all other groups (P < .001), followed by ProTaper. Preparation with ProFile left behind the highest amount of unprepared areas. The ProFile group revealed significantly more remaining color than ProTaper, GT Rotary, and FlexMaster (P < .05). Four FlexMaster files separated.
CONCLUSION
RaCe rotary files were safe and more effective compared to the other instruments.
目的
比较电动FlexMaster、GT Rotary、ProFile、ProTaper、RaCe旋转器械以及Hedström手动器械在模拟根管中的塑形能力和安全性。
研究设计
150个弯曲度为20度、半径为10毫米的模拟彩色根管被随机分为6组，每组25个样本。预备至根尖尺寸30后，使用图像分析软件测量根管壁上指示未预备区域的残留颜色面积（单位为平方毫米）。
结果
与所有其他组相比，使用RaCe处理的样本残留颜色面积最小（P < .001），其次是ProTaper。使用ProFile预备后未预备区域最多。ProFile组的残留颜色明显多于ProTaper、GT Rotary和FlexMaster（P < .05）。4根FlexMaster锉分离。
结论
与其他器械相比，RaCe旋转锉安全且更有效。
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