| Cellular response to metallic ions released from nickel-chromium dental alloys. | |
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MedLine Citation:
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PMID: 7560409 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Concerns exist over the potential release of elevated levels of metal ions such as Ni and Be from Ni-Cr dental casting alloys, due to their susceptibility to accelerated corrosion. In this investigation, we evaluated the release of metal ions from four commercial Ni-Cr alloys, representing a range of compositions, in three-day cell culture tests. Metal ion release, as measured by atomic absorption spectroscopy, was correlated to changes in cellular morphology, viability, and proliferation. The results showed that the test alloys and their corrosion products did not affect cellular morphology or viabilities, but did decrease cellular proliferation. The types and amounts of metal ions released, which corresponded to the alloys' reported surface and corrosion properties, also correlated to observed decreases in cellular proliferation after 72 h. Neptune, which caused the smallest decrease in cellular proliferation as compared with control cells, released the lowest amount of corrosion products, due to its corrosion-resistant, high-Cr-Mo-containing, homogeneous surface oxide. The other test alloys, which were susceptible to accelerated corrosion processes, released higher levels of metal ions that correlated to larger decreases in thymidine incorporation. Metal ion levels increased with test time for all alloys but were not proportional to bulk alloy compositions. Ni ions were released at slightly higher than bulk alloy compositions, while Be was released at from four to six times that of bulk alloy compositions. The elevated release of Be ions was associated with reduced cellular proliferation.(ABSTRACT TRUNCATED AT 250 WORDS) |
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Authors:
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J D Bumgardner; L C Lucas |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Journal of dental research Volume: 74 ISSN: 0022-0345 ISO Abbreviation: J. Dent. Res. Publication Date: 1995 Aug |
Date Detail:
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Created Date: 1995-11-02 Completed Date: 1995-11-02 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 0354343 Medline TA: J Dent Res Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1521-7 Citation Subset: D; IM |
Affiliation:
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Department of Biomedical Engineering, University of Alabama at Birmingham, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Beryllium
/
analysis,
pharmacology Cell Division / drug effects Cell Survival / drug effects Cells, Cultured Chromium / analysis, pharmacology Chromium Alloys / analysis, chemistry, pharmacology* Corrosion Fibroblasts / drug effects*, metabolism Humans Ions Molybdenum / analysis, pharmacology Nickel / analysis, pharmacology Oxides Spectrophotometry, Atomic Surface Properties Thymidine / metabolism Time Factors |
| Grant Support | |
ID/Acronym/Agency:
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1 RO3 DE10275-01/DE/NIDCR NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Chromium Alloys; 0/Ions; 0/Oxides; 50-89-5/Thymidine; 7439-98-7/Molybdenum; 7440-02-0/Nickel; 7440-41-7/Beryllium; 7440-47-3/Chromium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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