Single file endo concept is said to require a minimum or no glide path and only a single file for complete instrumentation for majority of root canals. The recommendation for single use has added advantage of reducing instrument fatigue. This concept reduce the working time and lower cross contamination between patients, a common problem associated with the use of multiple files, use of a single file will save both time and cost. Single file niti-rotary systems was classified into Single file systems using Reciprocating motion and Continuous motion.

Dr Amrutha Sathianath,PG student ,Department of Conservative Dentistry and Endodontic,JSS Dental College and Hospital ,Mysuru.