Influence of structure on nickel-titanium endodontic instruments failure.

Title	Influence of structure on nickel-titanium endodontic instruments failure.
Authors	Hans Kuhn, Kyra L. Jordan, B Tavernier
Magazine	Journal of endodontics
Date	07/31/2001
DOI	10.1097/00004770-200108000-00005
Introduction	This study examines how the processing history influences the fracture life of nickel-titanium endodontic files. The research utilises X-ray diffraction, scanning electron microscopy, and microhardness tests to analyse the microstructure of these engine-driven rotary instruments. The high work-hardening and defect density in these files can disturb phase transformation, as confirmed by Vickers microhardness tests, indicating dislocations and precipitates. Extended experimental spectrum lines in X-rays suggest a distorted lattice, while the surface condition observed via scanning electron microscopy significantly influences failure and fracture initiation.
Quote	Hans G. Kuhn, Kyra L. Jordan and B Tavernier. Influence of structure on nickel-titanium endodontic instruments failure. 2001. DOI: 10.1097/00004770-200108000-00005
Element	Nickel (Ni) , Titanium (Ti)
Materials	Metals and Alloys , Nickel-Based Alloys , Titanium Alloys
Topics	Structural Materials , Smart and Functional Materials , Shape-Memory Alloys and Polymers
Industry	Dentistry , Medical Devices