Hydrogen ion and calcium releasing of MTA Fillapex® and MTA-based formulations

Resumo

Introduction: MTA is composed of various metal oxides, calcium
oxide and bismuth. It has good biological properties and is indicated
in cases of endodontic complications. Several commercial formulations
are available and further studies are necessary to evaluate these
materials. Objective: To evaluate pH and calcium releasing of MTA
Fillapex® compared with gray and white MTA. Material and methods:
Gray and white MTA (Angelus) and MTA Fillapex® (Angelus) were
manipulated and placed into polyethylene tubes and immersed in
distilled water. The pH of these solutions was measured at 24 hours,
7 days and 14 days. Simultaneously, at these same aforementioned
periods, these materials’ calcium releasing was quantified, through
atomic absorption spectrophotometry. The results were submitted to
ANOVA, with level of significance at 5%. Results: Concerning to pH,
the materials present similar behaviors among each other at 24 hours
(p > 0.05). At 7 and 14 days, MTA Fillapex® provided significantly
lower pH values than the other materials (p < 0.05). Regarding to
calcium releasing, at 24 hours and 7 days, MTA Fillapex® provided
lower releasing than the other materials (p < 0.05). After 14 days,
differences were found between MTA Fillapex® and gray MTA (p <
0.05). Conclusion: All materials showed alkaline pH and calcium
releasing, with significantly lower values for MTA Fillapex® sealer.