Год выпуска: 2013 Автор: Pardeep Khurana and Kiranmeet K. Khurana Издательство: LAP Lambert Academic Publishing Страниц: 84 ISBN: 9783659496684
Описание
Nickel Titanium alloy was developed in 1963 by Bhuler et al.The ability of Nickel-Titanium to undergo extensive deformation resulting from a stress assisted phase transformation, with the reverse transformation occurring on unloading is called Super elasticity.Ni-Ti files also have ability to revert back to its original straight form without any sign of lasting deformation, this property is called ‘Shape memory’. Nevertheless, without any prior notice, a fracture can occur suddenly. Fracture of Ni-Ti files is main concern regarding there clinical use. Fracture of rotary instruments takes place in two different ways, due to torsion or ductility and due to cyclic fatigue through flexure.Ni-Ti rotary files causes small but consistent change in working length.There are number of factors associated with distortion and fracture of rotary Ni-Ti including speed of rotation, angle and radius of curvature of root. This aim of research in this book is evaluation of breakage, distortion and...
