Comparison between a Novel Nickel-Titanium Alloy and 508 Nitinol on the Cyclic Fatigue Life of ProFile 25/.04 Rotary Instruments

被引：140

作者：

Johnson, Eugenia ^{[1
]}

Lloyd, Adain ^{[1
]}

Kuttler, Sergio ^{[1
]}

Namerow, Kenneth ^{[1
]}

机构：

[1] Nova SE Univ, Coll Dent Med, Hlth Profess Div, Dept Endodont, Ft Lauderdale, FL 33328 USA

来源：

JOURNAL OF ENDODONTICS | 2008年 / 34卷 / 11期

关键词：

Canal preparation; cyclic fatigue; M-Wire NiTi; nickel titanium; rotary endodontics;

D O I：

10.1016/j.joen.2008.07.029

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

ProFile(R) 25/.04 instruments manufactured from three variants of Nitinol (1A, 1B & 2AS) were compared with stock production ProFile 25/.04 instruments and fatigue tested to failure. Cyclic fatigue testing was performed by rotating instruments at 300 RPM in a simulated steel root canal with 5 mm radius and 90 degrees curve until instrument separation. Time to failure was recorded. Torsion testing was undertaken by clamping 3 mm of each instrument tip between brass plates and rotating it at 2 RPM until failure. Data were recorded for torque and angle at fracture. Statistical differences were found with nickel-titanium variant 1B (M-Wire(TM) NiTi) nearly 400% more resistant to cyclic fatigue than stock ProFile 25/.04 (P<.001). Torsion testing found differences between all 508 Nitinol groups and M-Wire(TM) NiTi (P<.001). ProFile 25/.04 files manufactured from M-Wire(TM) NiTi have significantly greater resistance to cyclic fatigue while maintaining comparable torsional properties. (J Endod 2008;34:1406-1409)

引用

页码：1406 / 1409

页数：4

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