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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The effect of mixing method on tricalcium silicate-based cement

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Duque, J. A. [1] ; Fernandes, S. L. [1] ; Bubola, J. P. [1] ; Duarte, M. A. H. [1] ; Camilleri, J. [2] ; Marciano, M. A. [3]
Total Authors: 6
[1] Univ Sao Paulo, Dept Dent, Dent Sch Bauru, BR-17012901 Bauru, SP - Brazil
[2] Univ Malta, Fac Dent Surg, Dept Restorat Dent, Msida - Malta
[3] Univ Estadual Campinas, Piracicaba Dent Sch, Piracicaba, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: International Endodontic Journal; v. 51, n. 1, p. 69-78, JAN 2018.
Web of Science Citations: 5

AimTo evaluate the effect of three methods of mixing on the physical and chemical properties of tricalcium silicate-based cements. MethodologyThe materials evaluated were MTA Angelus and Portland cement with 20% zirconium oxide (PC-20-Zr). The cements were mixed using a 3:1 powder-to-liquid ratio. The mixing methods were manual (m), trituration (tr) and ultrasonic (us) activation. The materials were characterized by means of scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy. Flowability was analysed according to ANSI/ADA 57/2012. Initial and final setting times were assessed following ASTM C266/08. Volume change was evaluated using a micro-CT volumetric method. Solubility was analysed according to ADA 57/2012. pH and calcium ion release were measured after 3, 24, 72 and 168h. Statistical analysis was performed using two-way analysis of variance. The level of significance was set at P=0.05. ResultsThe SEM analysis revealed that ultrasonic activation was associated with a homogeneous distribution of particles. Flowability, volume change and initial setting time were not influenced by the mixing method (P>0.05). Solubility was influenced by the mixing method (P<0.05). For pH, at 168h, significant differences were found between MTA-m and PC-20-Zr-m (P<0.05). For calcium ion release, PC-20-Zr-tr had higher values than MTA-m at 3h, and MTA-tr had higher values than PC-20-Zr-m at 168h (P<0.05). ConclusionsThe ultrasonic and trituration methods led to higher calcium ion release and pH compared with manual mixing for all cements, whilst the ultrasonic method produced smaller particles for the PC-20-Zr cement. Flow, setting times and volume change were not influenced by the mixing method used; however, it did have an impact on solubility. (AU)

FAPESP's process: 14/01003-6 - Aluminum chloride and aluminum fluoride added to MTA Angelus to inhibit the dental discolouration: evaluation of physical, chemical and biological properties
Grantee:Marina Angélica Marciano da Silva
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/01934-2 - Influence of the handling method the physicochemical properties of the MTA and a calcium silicate based sealer
Grantee:Julia Putinatti Bubola
Support type: Scholarships in Brazil - Scientific Initiation