In vitro evaluation of an hydroxyapatite root canal system filling material.

An objective of endodontics is the three-dimensional filling of the root canal system, preventing leakage. The sealing ability of two hydroxyapatite formulations was compared with that of a gutta-percha/sealer combination placed with a vertical compaction technique. Zones of lysis tests of the hydroxyapatites showed no bacteriocidal effect of the formulations. Bacterial challenges of the sealing abilities of the formulations and gutta-percha/sealer combination showed that the formulations were not superior to the gutta-percha/sealer combination in their apical seal.