2017 Volume 38 Issue 3 Pages 159-164
Abstract : Purpose : The aim of this study was to compare the canal shaping properties of XP-endo Shaper (FKG, Switzerland) which was formed into a helical shape by thermal technology (MaxWire alloy) and NEX file (GC, Japan), which is a conventional constant taper nickel-titanium instrument in the oval-shaped tooth replica model by using micro-computed tomography (micro-CT) scanning.
Methods : A total of 20 oval-shaped mandibular premolar tooth same replica models were provided by two groups (XP-endo group : 10 ; NEX group : 10) and scanned preoperatively and postoperatively by micro-CT scanning. Canals were prepared with a new XP-endo Shaper which was formed into a helical shape and new NEX files as a conventional constant-taper nickel-titanium file under sterilized water irrigation. The volume of treated canal and the amount of the untreated area were measured. The data was analyzed using Student’s t-test.
Results : Instrumentation of canals increased their volume and surface area. The XP-endo group had a significantly higher proportion of treated volume and prepared surfaces than the NEX group (p<0.01).
Conclusion : Preparations with the XP-endo group had a greater volume of treated canal and smaller untreated area than the NEX group in oval-shaped mandibular premolar tooth replica models.
