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Stationary Fatigue Resistance of Various Rotary Instruments with Different Alloys after Preparing Three Root Canals

Afzal Ali1, Nihat Umut Gözen2, Abdurrahman Kerim Kul2

  • 1Department of Conservative Dentistry and Endodontics, Pacific Dental College and Hospital, Rajasthan, India.

European Endodontic Journal
|December 30, 2021
PubMed
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In materials that exhibit elastic and plastic behavior, known as elastoplastic materials, residual stresses can accumulate when these materials experience plastic deformation. This deformation arises from either high levels of shearing stress or significant strains. Residual stresses are internal stresses that persist within a material after removing the external force causing deformation. This phenomenon is demonstrated when observing the behavior of a shaft under torque; notably, the...
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Residual stresses reside in a structure even after removing the original stress inducer. This phenomenon often arises from varied plastic deformations across different parts of a structure. Consider a rod stretched beyond its yield point. It will not regain its original length due to permanent deformation. Even after load removal, the rod does not entirely lose stress because of uneven plastic deformations, resulting in residual stresses. The computation of these stresses in structures is...
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