Author/Authors :
Mohammadi، Zahed نويسنده , , Soltani، Mohammad Karim Soltani نويسنده Department of Orthodontics, Hamedan University of Medical Sciences, Hamedan, Iran; , , Shalavi ، Sousan نويسنده Private Dental Practice, Hamedan, Iran , , Asgary، Saeed نويسنده ,
Abstract :
Since the introduction of engine-driven nickel-titanium (NiTi) instruments, attempts have been
made to minimize or eliminate their inherent defects, increase their surface hardness/flexibility
and also improve their resistance to cyclic fatigue and cutting efficiency. The various strategies of
enhancing instrument surface include ion implantation, thermal nitridation, cryogenic treatment
and electropolishing. The purpose of this paper was to review the metallurgy and crystal
characteristics of NiTi alloy and to present a general over review of the published articles on
surface treatment of NiTi endodontic instruments.
