Cyclic Fatigue of Protaper Instruments

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Presentation transcript:

Cyclic Fatigue of Protaper Instruments Hélio Pereira Lopes, DDS, PhD, Edson Jorge Lima Moreira, DDS, MSc, Carlos Nelson Elias, Eng, PhD, Renata Andriola de Almeida, Mônica Schultz Neves Journal of Endodontics Volume 33, Issue 1, Pages 55-57 (January 2007) DOI: 10.1016/j.joen.2006.09.003 Copyright © 2007 American Association of Endodontists Terms and Conditions

Figure 1 Schematic drawing of the canals used in the tests. (A) Angle 90 degrees and arc 9.4 mm, and (B) angle 135 degrees and arc 14.1 mm. (C) Surface fracture with ductile morphological characteristics. It is possible to observe the dimples. (D) Surface fracture in the helical shaft of the fractured instrument with an absence of plastic deformation. Journal of Endodontics 2007 33, 55-57DOI: (10.1016/j.joen.2006.09.003) Copyright © 2007 American Association of Endodontists Terms and Conditions