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Dent Mater J. 2018 Nov 30;37(6):988-994. doi: 10.4012/dmj.2017-224. Epub 2018 Aug 29.

Dissolution and mineralization characterization of bioactive glass ceramic containing endodontic sealer Guttaflow Bioseal.

Author information

1
Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku.
2
Johan Gadolin Process Chemistry Center, Åbo Akademi University.
3
Laboratory of Physical Chemistry, Åbo Akademi University.
4
City of Turku Welfare Division, Oral Health Care.

Abstract

Aim of the study was to evaluate apatite forming ability and ion dissolution of bioactive glass-ceramic (BGC) particles from novel polydimethylsiloxane (PDMS) based endodontic sealer Guttaflow Bioseal. Firstly, water sorption and solubility were determined for Guttaflow 2 and Guttaflow Bioseal (GB), the latter containing BGC filler particles. Mineral precipitations in simulated body fluid (SBF) were observed with SEM/EDX. Ion-release from the sealer was determined with inductively coupled plasma optical emission spectrometry (ICP-OES) in Tris-buffer solution. Change in pH was also measured. The obtained data was statistically analyzed with Tukey's HSD test (p<0.05). GB exhibited significantly higher water sorption and solubility in comparison with Guttaflow 2. Surface structure exposed particles of BGC in the PDMS matrix. The BGC particles (size of 20-40 μm) indicated to consist of CaO-SiO2-Na2O-ZrO2-P2O5. Morphologically spherical Ca/P precipitation formed after 3 days in the SBF on the sealer surface. Ca/P ratio of the precipitation ranged in 1.20-1.65 indicating transformation to hydroxyapatite (HA). The pH of the immersion solution rose gradually.

KEYWORDS:

Apatite-forming ability; Bioactive glass-ceramic; Endodontic sealer; Guttaflow Bioseal; Ion-release

PMID:
30158347
DOI:
10.4012/dmj.2017-224
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