Comparison of Shaping Ability of XP-Endo Shaper in Simulated J-Shaped Canals with Various Sizes
Objective: To evaluate the shaping efficiency of the XP-endo Shaper® (XPS; FKG Dentaire, La Chaux-de-Fonds, Switzerland) in simulated canals with various sizes.
Materials and Methods: Sixty-four simulated J shaped root canals, which had various apical diameters and 2% taper were used. Apical diameters of group 1, group 2, group 3, and group 4 were 0.15 mm, 0.30 mm, 0.40 mm, 0.50 mm, respectively. Simulated resin canals were prepared with the XP-endo Shaper at 37°C inside a cabinet. The transportation value (TV), centering ability (CA), and the amount of resin removed (RR) were calculated using the superimposition of initial and final images. These parameters were calculated with the AutoCAD software program (Autodesk, San Rafael, CA) based on 18 reference points with 1-mm intervals of the canal. The data were analyzed with Kruskal-Wallis and then Dunn’s multiple comparison tests. The significance level was set at p ≤ 0.05.
Results: Shaping activity of XPS continued in group 4, but the amount of resin removed was statistically less than group 1. Group 2 and group 3 removed a statistically higher resin amount than group 1 and group 4 (p>0.05). Within groups, transportation value statistically increased in the middle region (points 4-6). The centering ratio of the groups was different at all points, being highest at point 8 and point 9.
Conclusion: Under the limitations of this study, XPS respected the root canal anatomy and adapted to the canal walls, even in large simulated canals.