Objectives: The aim of this research is to compare the different glide path instruments in order to assess the work time and the number of use for each instrument. Materials and methods: There were used 100 endodontic resin blocks with an S curvature for each group of instruments. on each block. first were used the k file # 10 and then the glide path was done using always the Xsmart m... https://www.socialstudiesscholar.com/