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28154749[PMID] - PMC - NCBI

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Items: 2

1.
Figure 1

Figure 1. From: Incidence of Deformation and Fracture of Twisted File Adaptive Instruments after Repeated Clinical Use.

Example of plastic deformation (unwinding of flutes) of twisted file adaptive SM2 and SM3.

Gianluca Gambarini, et al. J Oral Maxillofac Res. 2016 Oct-Dec;7(4):e5.
2.
Figure 2

Figure 2. From: Incidence of Deformation and Fracture of Twisted File Adaptive Instruments after Repeated Clinical Use.

Fractographic analysis of twisted file adaptive broken instruments showed signs of flexural fatigue (indicated by the arrows) and in some specimens also torsional fatigue (indicated by the circle).
A = SM3 instrument; B = SM2 instrument.

Gianluca Gambarini, et al. J Oral Maxillofac Res. 2016 Oct-Dec;7(4):e5.

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