| Ion leaching of a glass-ionomer glass: an empirical model and effects on setting characteristics and strength. | |
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MedLine Citation:
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PMID: 17200822 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The release of ions from a glass-ionomer glass, which in the polyacid matrix effects the cross-linking and setting of a cement, can be modelled and initiated by acid-treatment in a dilute acid. This study examined the effect of time of acetic acid leaching on the working time, setting time, and strength of a model GIC. A reactive fluoride glass was immersed in hot acetic acid for 0 (control), 5, 15, 35, 65, 95 and 125 min, filtered and dried. The glass was mixed with an experimental GI liquid in a capsule system and the mixed pastes assessed for working and initial setting time. Compressive strength testing was undertaken according to ISO9917:2003. Immersion time had a significant effect on both working and setting time of the resultant pastes only up to 65 min of immersion, and corresponded with a thin-film ion diffusion model. Compressive strength did not vary significantly with immersion time. The glass-ionomer setting reaction can be conveniently retarded by immersion of the powder in acetic acid, without affecting strength. A reactivity model was developed, whereby the effects of various changes to the leaching process may be usefully examined. |
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Authors:
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Leon H Prentice; Martin J Tyas; Michael F Burrow |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of materials science. Materials in medicine Volume: 18 ISSN: 0957-4530 ISO Abbreviation: J Mater Sci Mater Med Publication Date: 2007 Jan |
Date Detail:
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Created Date: 2007-01-03 Completed Date: 2007-05-29 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9013087 Medline TA: J Mater Sci Mater Med Country: United States |
Other Details:
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Languages: eng Pagination: 127-31 Citation Subset: IM |
Affiliation:
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School of Dental Science, University of Melbourne, Parkville, Victoria 3010, Australia. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acetic Acid
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chemistry Acrylic Resins / chemistry* Capsules Compressive Strength Ions Materials Testing Models, Chemical* Nanostructures / chemistry* Particle Size Powders Silicon Dioxide / chemistry* Solutions / chemistry Time Factors Water / chemistry |
| Chemical | |
Reg. No./Substance:
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0/Acrylic Resins; 0/Capsules; 0/Ions; 0/Powders; 0/Solutions; 0/glass ionomer; 64-19-7/Acetic Acid; 7631-86-9/Silicon Dioxide; 7732-18-5/Water |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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