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Incorporation of particulate bioactive glasses into a dental root canal sealer


Heid, Susanne; Stoessel, Philipp R; Tauböck, Tobias T; Stark, Wendelin J; Zehnder, Matthias; Mohn, Dirk (2016). Incorporation of particulate bioactive glasses into a dental root canal sealer. Biomedical glasses, 2(1):29-37.

Abstract

Flame spray synthesis has opened the possibility to add additional elements to complex materials such as bioactive glasseswhile maintaining nanoparticulate properties. In this study, it was investigated whether a flamesprayed bismuth oxide doped nanometric 45S5 bioactive glass could be incorporated into a commercially available epoxy-resin root canal sealer, and how this compared to a conventional, pure 45S5 micrometric bioactive glass. Effects on radiopacity, microhardness, pH and mineral induction in phosphate buffered saline and simulated body fluid were studied. It was revealed that the radiopaque nanometric bismuth-containing 45S5 bioactive glass reduced radiopacity of the root canal sealer less than a conventional micrometric counterpart. In addition, pH induction and calcium phosphate precipitation were quicker with the nanometric compared to the micrometric material, whilst the micrometric glass displayed a higher alkaline capacity. Both materials apparently bound to the epoxy resin matrix, thus increasing its microhardness after polymerization reaction. Effects were dose-dependent. The investigated radiopaque bioactive glass containing bismuth oxide could be a valuable add-on for current root canal sealers.

Abstract

Flame spray synthesis has opened the possibility to add additional elements to complex materials such as bioactive glasseswhile maintaining nanoparticulate properties. In this study, it was investigated whether a flamesprayed bismuth oxide doped nanometric 45S5 bioactive glass could be incorporated into a commercially available epoxy-resin root canal sealer, and how this compared to a conventional, pure 45S5 micrometric bioactive glass. Effects on radiopacity, microhardness, pH and mineral induction in phosphate buffered saline and simulated body fluid were studied. It was revealed that the radiopaque nanometric bismuth-containing 45S5 bioactive glass reduced radiopacity of the root canal sealer less than a conventional micrometric counterpart. In addition, pH induction and calcium phosphate precipitation were quicker with the nanometric compared to the micrometric material, whilst the micrometric glass displayed a higher alkaline capacity. Both materials apparently bound to the epoxy resin matrix, thus increasing its microhardness after polymerization reaction. Effects were dose-dependent. The investigated radiopaque bioactive glass containing bismuth oxide could be a valuable add-on for current root canal sealers.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic for Preventive Dentistry, Periodontology and Cariology
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:2016
Deposited On:06 Dec 2016 09:25
Last Modified:30 Sep 2017 09:10
Publisher:De Gruyter
ISSN:2299-3932
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1515/bglass-2016-0004

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