| The effect of oxalic acid incorporation on the setting time and strength of a glass-ionomer cement. | |
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MedLine Citation:
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PMID: 16701865 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Oxalic acid and its metal oxalate salts have been used extensively in dentistry in a range of applications: as desensitisers, in cavity preparation, and as bonding agents. This study investigated the influence of oxalic acid upon the working time, initial setting time, 24-h hardness and compressive strength of a glass-ionomer cement. Conventional glass-ionomer liquids were prepared from polyacrylic acid, tartaric acid, water, and oxalic acid at concentrations of 0-7% w/w. Liquids were dosed into capsules with a commercial glass-ionomer powder, activated and mixed. The resultant pastes were assessed for working time, initial setting time, 24-h hardness and 24-h compressive strength. Liquids containing 0.5-1% oxalic acid lengthened the working time and initial setting time. At concentrations greater than 2%, both working and initial setting times decreased with increasing oxalic acid. Surface hardness values using liquids with 3% and 7% oxalic acid were less hard than the control. Compressive strength was unchanged over the concentrations tested. Oxalic acid may be a useful reaction modifier in glass-ionomer systems. It accelerated the setting reaction without affecting strength, but was limited to low concentrations because of its relatively poor solubility in water. |
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Authors:
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Leon Hugh Prentice; Martin Tyas; Michael F Burrow |
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Publication Detail:
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Type: Journal Article Date: 2005-10-10 |
Journal Detail:
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Title: Acta biomaterialia Volume: 2 ISSN: 1742-7061 ISO Abbreviation: - Publication Date: 2006 Jan |
Date Detail:
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Created Date: 2006-05-16 Completed Date: 2006-06-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101233144 Medline TA: Acta Biomater Country: England |
Other Details:
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Languages: eng Pagination: 109-12 Citation Subset: IM |
Affiliation:
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School of Dental Science, University of Melbourne, Parkville, VIC. 3010, Australia. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Biomechanics Compressive Strength Glass Ionomer Cements / chemistry* Materials Testing Oxalic Acids / chemistry* Surface Properties |
| Chemical | |
Reg. No./Substance:
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0/Glass Ionomer Cements; 0/Oxalic Acids |
| Comments/Corrections | |
Erratum In:
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Acta Biomater. 2006 May;2(3):363 Note: Burrow, Michael F [added] |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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