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Dent Mater. 2014 Dec;30(12):1291-303. doi: 10.1016/j.dental.2014.09.005. Epub 2014 Oct 23.

Influence of composition on setting kinetics of new injectable and/or fast setting tricalcium silicate cements.

Author information

1
Advanced Drug Delivery and Biomaterials, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium; Center for Research and Engineering on Biomaterials (CRIBIO), Université catholique de Louvain, Brussels, Belgium. Electronic address: hugosetbon@gmail.com.
2
Institute of Condensed Matter and Nanosciences - Bio- and Soft-Matter, Université catholique de Louvain, Louvain-la-Neuve, Belgium; Center for Research and Engineering on Biomaterials (CRIBIO), Université catholique de Louvain, Brussels, Belgium.
3
Earth and Life Institute - Environmental Sciences, Université catholique de Louvain, Louvain-la-Neuve, Belgium.
4
Advanced Drug Delivery and Biomaterials, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium; School of Dentistry and Stomatology, Université catholique de Louvain, Brussels, Belgium; Center for Research and Engineering on Biomaterials (CRIBIO), Université catholique de Louvain, Brussels, Belgium.

Abstract

OBJECTIVES:

New commercial tricalcium silicate based cements were elaborated to improve handling properties and setting time. The goals of the present work were: (i) to determine the composition of the new injectable and/or fast setting calcium silicate based cements, and (ii) to investigate the impact of the differences in composition on their setting kinetics.

METHODS:

The materials considered were Angelus MTA™, Biodentine™, MM-MTA™, MTA-Caps™, and ProRoot MTA™ as control. Elemental composition of materials was studied by Inductively Coupled Plasma-Atomic Emission Spectroscopy and X-ray Energy Dispersive analysis, whereas phases in presence were analyzed by Micro-Raman spectroscopy and X-ray Diffraction analysis and cement surface by Scanning Electron Microscope. Setting kinetics was evaluated using rheometry.

RESULTS:

Elemental analysis revealed, for all cements, the presence of three major components: calcium, silicon and oxygen. Chlorine was detected in MM-MTA, MTA-Caps and Biodentine. Different radio-opacifiers were identified: bismuth oxide in ProRoot MTA, Angelus MTA and MM-MTA, zirconium oxide in Biodentine and calcium tungstate (CaWO4) in MTA-Caps. All cements were composed of di- and tri-calcium silicate, except Biodentine for which only the latter was detected. Major differences in setting kinetics were observed: a modulus of 8×10(8)Pa is reached after 12min for Biodentine, 150min for MM-MTA, 230min for Angelus MTA and 320min for ProRoot MTA. The maximum modulus reached by MTA-Caps was 7×10(8)Pa after 150min.

SIGNIFICANCE:

Even if these cements possess some common compounds, major differences in their composition were observed between them, which directly influence their setting kinetics.

KEYWORDS:

Biodentine; EDX; Mineral trioxide aggregate; Raman; Rheometry; SEM; Setting kinetics; Tricalcium silicate cements; XRD

PMID:
25443159
DOI:
10.1016/j.dental.2014.09.005
[Indexed for MEDLINE]

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