Aim:

Ex vivo, tridimensional evaluation with cone beam computed tomography (CBCT), of the presence of voids, the obtu-ration volume and adaption to the root canal walls with simulated internal root resorption, using injected gutta-percha or bioceramic sealer with single gutta-percha cone.

Materials and methods:

Ten maxillary extracted central human incisors were used and artificial internal root resorption was created in each one. For the root canal obturation, each too-th was subjected to two different experimental conditions successively, conforming two matched groups: Group I: EQ-V Master injected thermo plasticized gutta-percha system. Group II: gutta-percha point plus BioRoot RCS bioceramic sealer. First, the root canals were filled with injected gutta-percha and then, with the bioceramic sealer. Then the teeth were scanned with CBCT and subsequently a digital three-dimensional reconstruction was performed. The presence of voids, obturation volumne and the dentin wall surface covered by the filling material was quantita-tive analyzed through a software; at the coronal, middle (blister) and apical thirds. The data was analyzed by using Wilcoxon test (P<0.05).

Results:

The filling material volume and the dentin wall sur-face covered by it, was similar in both root canal obturation tech-niques. There was no significant difference between both groups (P>0.05).

Conclusion:

Although voids were observed in both groups (when the injected thermo plasticized gutta-percha system was used the voids were at the external surface and when BioRoot RCS + gutta-percha cone was used the voids were into the filling material), the obturation of simulated root canal resorption cavi-ties was similar with both obturation techniques.