| Effects of environmental calcium and phosphate on wear and strength of glass ionomers exposed to acidic conditions. | |
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MedLine Citation:
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PMID: 18506830 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study evaluated the effects of environmental calcium and phosphate on wear resistance, strength, and surface morphology of highly viscous glass-ionomers (HVGICs) (Fuji IX Fast [FN] and KetacMolar [KM]) when exposed to acidic conditions. Fabricated specimens were randomly divided into five groups and kept in acidic solutions (pH 3) with varied levels of calcium and phosphate ranging from 0 to 2.4 mM. After 4 weeks of conditioning, the specimens were subjected to wear testing, shear punch, and surface roughness testing as well as SEM evaluation. Multiple comparisons of wear depth (microm), shear strength (MPa), and surface roughness (Ra) between acidic conditions were performed using ANOVA/post-hoc Scheffe's test (p < 0.05). Results showed that FN and KM exposed to acidic conditions had varied wear resistance, shear strength, surface roughness, and structure depending on environmental phosphate level. Increased level of environmental phosphate led to rougher surface, greater wear resistance, and strength of FN and KM than the controls (acid of pH 3). Under SEM, the surface of both FN and KM specimens were covered by numerous small particles when environmental phosphate was high. Results suggest that environmental phosphate may improve wear resistance and shear strength of HVGICs when challenged by acids. |
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Authors:
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X Y Wang; Adrian U J Yap |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of biomedical materials research. Part B, Applied biomaterials Volume: 88 ISSN: 1552-4981 ISO Abbreviation: J. Biomed. Mater. Res. Part B Appl. Biomater. Publication Date: 2009 Feb |
Date Detail:
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Created Date: 2009-01-14 Completed Date: 2009-03-05 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101234238 Medline TA: J Biomed Mater Res B Appl Biomater Country: United States |
Other Details:
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Languages: eng Pagination: 458-64 Citation Subset: IM |
Copyright Information:
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2008 Wiley Periodicals, Inc. |
Affiliation:
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Department of Cariology, Endodontology, and Operative Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China. wangxiaoyanpx@gmail.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acids
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chemistry* Acrylic Resins / chemistry* Calcium / chemistry* Computer Simulation Hydrogen-Ion Concentration Materials Testing Phosphates / chemistry* Silicon Dioxide / chemistry* Stress, Mechanical |
| Chemical | |
Reg. No./Substance:
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0/Acids; 0/Acrylic Resins; 0/Phosphates; 0/glass ionomer; 7440-70-2/Calcium; 7631-86-9/Silicon Dioxide |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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