Objective:

To compare the in vitro apical microleakage of teeth sealed with three techniques: lateral condensation, vertical condensation, and Obtura II.

Methods:

A total of 75 single-root teeth were divided into five groups: Group 1 - lateral condensation, Group 2 - vertical condensation, Group 3 - Obtura II system, Group 4 - positive control, Group 5 - negative control. The roots were subjected to apical leakage through indirect diffusion with Chinese ink, diaphonized, and observed under a Vasconcellos microscope. Descriptive statistical tests were conducted with GraphPad Prism 8.

Results:

Group 1 showed greater microleakage (0.6603 ± 0.5063) with a statistically significant difference compared to group 3 (p < 0.05). However, there was no gutta-percha extrusion, unlike in the other groups.

Conclusion:

The Obtura II technique showed better sealing, which led to decreased apical microleakage, thus proving to be more effective than the other techniques studied.

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