Abstract
This study aimed to assess the physicochemical properties of a repair material in the Brazilian market, BioMTA, in comparison to other two materials currently in use (Biodentine and MTA Angelus). The initial setting time was evaluated using Gillmore needle. The pH was measured with a pH-meter after 24 h, 3, 7, 14 and 21 days. The radiopacity was determined using the equivalence in millimeters of aluminum (mm Al) from digitized occlusal radiographs. Solubility was determined after immersion in water for 7 days. The data were analyzed by one-way ANOVA and Tukey tests (a=0.05). The BioMTA initial setting time (5.2 min) was lower than the other materials (p<0.05). All materials showed an alkaline pH at 21 days. At 24 h, BioMTA was the most alkaline material (p<0.05); and at 3, 7, 14 and 21 days there was no difference between BioMTA and Biodentine (p>0.05), both being more alkaline than MTA Angelus (p<0.05). The radiopacity of BioMTA (4.2 mm Al) was significantly higher compared to Biodentine (p<0.05) and lower than MTA Angelus (p<0.05). The solubility of the materials was -4.2%, -1.6% and 4.1% for BioMTA, MTA Angelus and Biodentine, respectively, with a significant difference between them (p<0.05). Therefore, it can be concluded that BioMTA displayed a shorter setting time, an alkaline pH, a higher radiopacity, and a gain in mass.
Highlights
An ideal repair material should seal any possible communication between the root canal system and adjacent tissues [1]
The mineral trioxide aggregate (MTA) Angelus was manipulated with a spatula No 24 (Golgran, Sao Caetano do Sul, SP, Brazil) for 30 s
MTA Angelus and BioMTA showed an increase in mass (-1.6% and -4.2%, respectively) showing significant differences between them (p
Summary
An ideal repair material should seal any possible communication between the root canal system and adjacent tissues [1]. The mineral trioxide aggregate (MTA) is widely used for several applications in the endodontic practice due to its suitable properties [2]. Likewise, it has excellent biological response and biocompatibility [3]. It has disadvantages that generate serious concerns such as tooth discoloration [4], delicate handling and long setting time [1]. Tooth discoloration has been attributed to the radiopacifying agent in MTA composition, the bismuth oxide [5]. Several types of cements have been developed with similar characteristics to those of MTA but without their disadvantages
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