dc.contributor.author | Tiskaya, M | |
dc.contributor.author | Salihi, A | |
dc.contributor.author | Shahid, S | |
dc.contributor.author | Hill, R | |
dc.date.accessioned | 2024-04-25T14:49:01Z | |
dc.date.available | 2022-09-08 | |
dc.date.available | 2024-04-25T14:49:01Z | |
dc.date.issued | 2022-09-23 | |
dc.identifier.citation | Melissa Tiskaya, Albiha Salihi, Saroash Shahid, Robert Hill, Are inert glasses really inert?, Dental Materials, Volume 38, Issue 11, 2022, Pages 1742-1748, ISSN 0109-5641, https://doi.org/10.1016/j.dental.2022.09.004. (https://www.sciencedirect.com/science/article/pii/S0109564122002512) Abstract: Objectives The aim of this study was to investigate the degradation of inert glass fillers which are commonly used in conventional resin-based composites to provide radiopacity, reduce the polymerization shrinkage and improve the mechanical properties. Methods 75 mg of five different glass powders (1 µm) was immersed separately into 50 mL of acetic acid (pH 4) and tris buffer (pH 7.4) for up to 4 weeks. At each time point the glass powder was filtered and dried for characterization using ATR-FTIR and XRD to assess the degradation behavior and crystallization. ICP-OES, ISE and pH measurements were performed on the supernatant solutions to monitor the pH and ion release. Results Although FTIR and XRD analysis showed no significant glass degradation or crystallization upon immersion, there was a substantial release of ions from the inert fillers, especially from BABFG and CDL. Barium release for these fillers were 270 and 165 ppm respectively. G018–373 glass presented the lowest ion release followed by GM27884 and BABG. The ion release was more pronounced in acidic conditions compared to neutral conditions apart from the fluoride release. Significance Inert glasses are not as inert as previously thought. This may result in leaching of ions, potentially causing toxicity, reduction in mechanical properties, increased wear and subsequent failure of the composite material. The ions released from the inert glass may interfere with other glass fillers such as bioactive glass fillers, inhibiting degradation of the bioactive glass, beneficial ion release from the bioactive glass, pH neutralization and apatite formation. Keywords: Inert glass; Degradation; Leaching; Ion release | en_US |
dc.identifier.issn | 0109-5641 | |
dc.identifier.uri | https://qmro.qmul.ac.uk/xmlui/handle/123456789/96425 | |
dc.description.abstract | Abstract
Objectives
The aim of this study was to investigate the degradation of inert glass fillers which are commonly used in conventional resin-based composites to provide radiopacity, reduce the polymerization shrinkage and improve the mechanical properties.
Methods
75 mg of five different glass powders (1 µm) was immersed separately into 50 mL of acetic acid (pH 4) and tris buffer (pH 7.4) for up to 4 weeks. At each time point the glass powder was filtered and dried for characterization using ATR-FTIR and XRD to assess the degradation behavior and crystallization. ICP-OES, ISE and pH measurements were performed on the supernatant solutions to monitor the pH and ion release.
Results
Although FTIR and XRD analysis showed no significant glass degradation or crystallization upon immersion, there was a substantial release of ions from the inert fillers, especially from BABFG and CDL. Barium release for these fillers were 270 and 165 ppm respectively. G018–373 glass presented the lowest ion release followed by GM27884 and BABG. The ion release was more pronounced in acidic conditions compared to neutral conditions apart from the fluoride release.
Significance
Inert glasses are not as inert as previously thought. This may result in leaching of ions, potentially causing toxicity, reduction in mechanical properties, increased wear and subsequent failure of the composite material. The ions released from the inert glass may interfere with other glass fillers such as bioactive glass fillers, inhibiting degradation of the bioactive glass, beneficial ion release from the bioactive glass, pH neutralization and apatite formation. | en_US |
dc.format.extent | 1742 - 1748 | |
dc.publisher | Elsevier | en_US |
dc.relation.ispartof | DENTAL MATERIALS | |
dc.rights | This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). | |
dc.subject | Inert glass | en_US |
dc.subject | Degradation | en_US |
dc.subject | Leaching | en_US |
dc.subject | Ion release | en_US |
dc.title | Are inert glasses really inert? | en_US |
dc.type | Article | en_US |
dc.rights.holder | © 2022 The Author(s). Published by Elsevier Inc. on behalf of The Academy of Dental Materials. | |
dc.identifier.doi | 10.1016/j.dental.2022.09.004 | |
pubs.author-url | https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000880026500007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=612ae0d773dcbdba3046f6df545e9f6a | en_US |
pubs.issue | 11 | en_US |
pubs.notes | Not known | en_US |
pubs.publication-status | Published | en_US |
pubs.volume | 38 | en_US |
rioxxterms.funder | Default funder | en_US |
rioxxterms.identifier.project | Default project | en_US |