Chemical-physical Properties and Apatite-forming Ability of Mineral Trioxide Aggregate Flow

Bruno Martini Guimarães; Rodrigo Ricci Vivan; Bruno Piazza; Murilo Priori Alcalde; Clovis Monteiro Bramante; Marco Antonio Hungaro Duarte

doi:10.1016/j.joen.2017.05.005

Chemical-physical Properties and Apatite-forming Ability of Mineral Trioxide Aggregate Flow

J Endod. 2017 Oct;43(10):1692-1696. doi: 10.1016/j.joen.2017.05.005. Epub 2017 Jul 20.

Authors

Bruno Martini Guimarães¹, Rodrigo Ricci Vivan², Bruno Piazza², Murilo Priori Alcalde², Clovis Monteiro Bramante², Marco Antonio Hungaro Duarte²

Affiliations

¹ Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil. Electronic address: brunomgui@usp.br.
² Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil.

PMID: 28735787
DOI: 10.1016/j.joen.2017.05.005

Abstract

Introduction: This study aimed to analyze the chemical-physical properties, including pH, volumetric change, radiopacity, and apatite-forming ability in simulated body fluid, of a new tricalcium silicate material (MTA Flow; Ultradent Products Inc, South Jordan, UT).

Methods: MTA Flow was tested in comparison with MTA Angelus (Angelus, Londrina, PR, Brazil). The pH of soaking water was tested up to 168 hours in deionized water. In the solubility test, the root-end fillings of 20 acrylic teeth were scanned twice by micro-computed tomographic imaging before and after immersion in ultrapure water for 168 hours. In addition, using an aluminum step wedge, the radiopacity of each material was evaluated as recommended by international standards. The mean gray values of the test materials were measured using ImageJ software (National Institutes of Health, Bethesda, MD). The morphologic and chemical analyses of the material surface were performed using scanning electron microscopic energy-dispersive X-ray spectroscopic analysis after 28 days in Hank's balanced salt solution (HBSS). The data were analyzed using 2-way analysis of variance with the Student-Newman-Keuls test (P < .05).

Results: MTA Flow showed similar alkalizing activity to that of MTA Angelus. In the solubility test, both materials presented lower values without statistical differences. Both materials showed a marked alkalinizing activity within 3 hours, which continued for 168 hours. MTA Angelus showed statistically higher radiopacity values (P < .05). All materials showed the ability to nucleate calcium phosphate on their surface after 28 days in HBSS.

Conclusions: MTA Flow showed remarkable alkalinizing capability, low solubility, good radiopacity, and the ability to form calcium phosphate deposits after being soaked in simulated body fluid, showing values similar to those of MTA Angelus.

Keywords: Calcium phosphate formation; ion releasing; mineral trioxide aggregate; radiopacity; solubility.

Publication types

Comparative Study

MeSH terms

Aluminum Compounds / chemistry*
Apatites / chemistry
Bismuth / chemistry
Calcium Compounds / chemistry*
Calcium Phosphates
Contrast Media / chemistry*
Drug Combinations
Materials Testing*
Microscopy, Electron, Scanning
Oxides / chemistry*
Root Canal Filling Materials / chemistry*
Silicates / chemistry*
Solubility
Spectrometry, X-Ray Emission

Substances

Aluminum Compounds
Apatites
Calcium Compounds
Calcium Phosphates
Contrast Media
Drug Combinations
MTA-Angelus
Oxides
Root Canal Filling Materials
Silicates
mineral trioxide aggregate
calcium phosphate
Bismuth