Abstract
The titanium is superior in strength and resistance against corrosion, and the stimulation toxicity for a tissue is little. Positive introduction is planned in the field of endodontics ultra elasticity and shape memory are special. On this account, in the field of tooth treatment, the nature of the nickel enhanced titanium alloy is utilized. If conforms to it with flexibility in root canals. Possibilty of reduce technique troubles, especially in curve root canals where difficult operations were needed formerly. hecently, it becomes possible to do effectively treatments. At This time, this study was examined and discussed conformity in the extracted root canales which compared with useing titanium files and stainless files. As a result, in carve canal, a meaningfull difference was recognized and NT file system was an effective appliance for gulf canal.
