Apical microleakage evaluation of a new proposal for endodontic sealer associated with hydroxyapatite: an ex vivo study

The filling of the root canal system has a fundamental role in endodontic treatment, since it will take the place of the root pulp, thus the material must act by isolating the root canal system, preventing the penetration of microorganisms and their toxic by-products, which can compromise the prognosis of the procedure. The present study was carried out to evaluate the apical microleakage of a hydroxyapatite modified sealer. After removal of crowns and endodontic instrumentation, 40 selected maxillary single root teeth were randomly divided into two experimental groups (n = 15 each) according to the sealer: GENDO – Endomethasone Sealer / GENDOHX - Endomethasone Sealer +5% hydroxyapatite, and two control groups (n = 5 each). The root canals of specimens from the experimental group were filled with the cold lateral condensation technique. To assess apical microleakage, the apical linear dye penetration was measured microscopically from apex to most coronal part and data were statistically analyzed. Descriptive analyses were performed, followed by the Mann- Whitney test. The mean values of leakage observed in the groups were GENDO – 0,95± 1,80 and GENDOHX – 1,01± 1,82. No significant differences were found between experimental groups (p>0,05). Conclusion: The addition of hydroxyapatite to the endomethasone sealer did not interfere with its apical sealing capacity.