Aim:

To compare the centering capacity and apical transport of the Reciproc Blue and X-Pendo Shaper system in resin blocks with juxtaposed pre and postoperative photographs, using the Photoshop software.

Materials and methods:

20 resin plugs were randomly divided into two groups (n=10) that were prepared with XP-endo Shaper and Reciproc Blue respectively. Digital photographs of the blocks were taken, before and after preparation, with each system in the same position. Then the obtained photographs were juxtaposed using Photoshop software. The deviations of the center of the canal, with respect to its inter nal and external wall, were measured at various pre-established reference points. These data were statistically analysed with the ANOVA test.

Results:

Both systems produced transport and deviation from the original trajectory of the root canal, but the statistical analysis (2x8 Factorial ANOVA) did not quantify significant differences between both systems (p=0.4044)

Conclusions:

Under the conditions of this work, both systems produce transport and deviation with respect to the original trajectory of the root canal.