| Effect of food-simulating liquids on surface characteristics of composite and polyacid-modified composite restoratives. | |
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MedLine Citation:
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PMID: 11203812 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The chemical environment is one aspect of the oral environment that could have an appreciable influence on the in vivo degradation of composite resins. The effects of food-simulating liquids on the surface roughness and hardness of composite (Silux Plus, Z100, Spectrum TPH, and P50) and polyacid-modified composite resins (F2000 and Dyract AP) were thus investigated and compared. Sixty disks of each material were made. Half were used for microhardness testing and the remaining half for studying surface roughness using profilometry. Each group of 30 disks was subdivided into six groups of five and conditioned for one week as follows--Group 1 (control): air at 37 degrees C; Group 2: distilled water at 37 degrees C; Group 3: 0.02 N citric acid at 37 degrees C; Group 4: 0.02 N lactic acid at 37 degrees C Group 5: heptane at 37 degrees C; Group 6: 50% ethanol-water solution at 37 degrees C. Data were analyzed using one-way ANOVA and Scheffé's test at a significance level of 0.05. Results showed that the surface roughness of all restoratives evaluated was not significantly affected by food-simulating liquids. No significant change in surface hardness was noted with conditioning of Spectrum TPH, Dyract AP, and F2000 in the various food-simulating liquids. The BIS-GMA-based composites Silux Plus, Z100, and P50 appeared to be more susceptible to the softening effects of some food-simulating liquids. |
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Authors:
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A U Yap; J S Low; L F Ong |
Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Operative dentistry Volume: 25 ISSN: 0361-7734 ISO Abbreviation: Oper Dent Publication Date: 2000 May-Jun |
Date Detail:
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Created Date: 2001-02-05 Completed Date: 2001-04-19 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7605679 Medline TA: Oper Dent Country: United States |
Other Details:
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Languages: eng Pagination: 170-6 Citation Subset: D |
Affiliation:
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National University of Singapore, 5 Lower Kent Ridge Road, Singapore 119074, Republic of Singapore. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Air Analysis of Variance Bisphenol A-Glycidyl Methacrylate / chemistry Citric Acid / chemistry Compomers / chemistry* Composite Resins / chemistry* Dental Restoration, Permanent* Ethanol / chemistry Food* Hardness Heptanes / chemistry Humans Lactic Acid / chemistry Materials Testing Methacrylates / chemistry Silicates / chemistry Silicon Dioxide* Statistics as Topic Surface Properties Water / chemistry Zirconium* |
| Chemical | |
Reg. No./Substance:
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0/Compomers; 0/Composite Resins; 0/Dyract; 0/Heptanes; 0/Methacrylates; 0/Silicates; 0/Spectrum composite resin; 0/Z100 composite resin; 117681-35-3/P50 composite resin; 123759-84-2/Silux Plus; 1565-94-2/Bisphenol A-Glycidyl Methacrylate; 50-21-5/Lactic Acid; 64-17-5/Ethanol; 7440-67-7/Zirconium; 7631-86-9/Silicon Dioxide; 77-92-9/Citric Acid; 7732-18-5/Water |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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