ISSN: 2320-5407 Int. J. Adv. Res. 5(4), 1-5 1 Journal Homepage: - www.journalijar.com Article DOI: 10.21474/IJAR01/3774 DOI URL: http://dx.doi.org/10.21474/IJAR01/3774 RESEARCH ARTICLE USE OF NICKEL-TITANIUM ROTARY INSTRUMENTS AMONG DENTISTS IN CHENNAI. Sahil Choudhari 1 and Dr. Chandana Subbarao 2 . 1. ll BDS, Department of Conservative Dentistry, Saveetha Dental College, Chennai – 600 077. 2. Senior Lecturer, Department of Conservative Dentistry and Endodontics, Saveetha Dental College ,Chennai – 600 077 …………………………………………………………………………………………………….... Manuscript Info Abstract ……………………. ……………………………………………………………… Manuscript History Received: 01 February 2017 Final Accepted: 01 March 2017 Published: April 2017 Key words:- NiTi, Rotary instruments, obturation, file fracture Objective: To assess the use of nickel-titanium (NiTi) rotary instruments among dentists in Chennai using a structured questionnaire. Materials and Methods: A survey was conducted among dentists in Chennai using a structured questionnaire. The sample size comprised of 91 dental practitioners in Chennai. Results: A total of 91 dental practitioners took up the survey. As many as 77 (84.6%) of them use NiTi rotary instruments and 14 (15.4%) of them do not use NiTi rotary instruments in their clinical practice. 28 (30.8%) dentists believed it helped in better obturation. 42 (54.5%) of the dentists experienced file fracture as the major drawback. Half of the respondents believed that the long time required to learn the technique was the reason for not using NiTi rotary instruments. Conclusion: This survey showed the awareness of dentists about benefits of NiTi rotary instruments application comparing to traditional techniques and also the high percent usage of these instruments among dentists. Copy Right, IJAR, 2017,. All rights reserved. …………………………………………………………………………………………………….... Introduction:- The introduction of nickel-titanium (NiTi) rotary files to endodontics almost two decades ago has changed the way root canal preparations are performed, enabling more complicated root canal systems to be shaped with fewer procedural errors. Cleaning and shaping of the root canal system is one of the main goals in endodontics which can be carried out using different systems and techniques. To reach this aim, stainless steel hand instruments have been traditionally applied. Lack of flexibility of instruments causes errors during endodontic treatments which lead to decreased success rate. [1] After introducing rotary nickel-titanium (NiTi), their usage became popular. NiTi instruments super elasticity along with their advanced design made them favourable for effective and safe instrumentation of narrow and curved root canals using low torque handpieces. The ability of some NiTi rotary systems in maintaining the root canal curvature has been studied. [2] Nickel-titanium alloy was developed in the 1960s, initially for military purposes, but it soon became apparent that NiTi was also useful for other applications, such as orthodontic wires and dental burs. K-type root canal files were made of NiTi and tested extensively. The first NiTi rotary files appeared on the market around 1993. These early rotary files were designed with cross-sections that did not have cutting edges but rather broad radial lands. [3][4] Corresponding Author:- Sahil Choudhari. Address:- ll BDS, Department of Conservative Dentistry, Saveetha Dental College, Chennai – 600 077.