Advanced Search

Journal Navigation

Journal Home

Subscriptions

Archive

Contact Us

Table of Contents

CiteULike is a free service for managing and discovering scholarly references - click here to get started.

Sign In to gain access to subscriptions and/or personal tools.
Journal of Dental Research
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to Saved Citations
Right arrow Download to citation manager
Right arrowRequest Permissions
Right arrow Request Reprints
Right arrow Add to My Marked Citations
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Right arrow Citing Articles via Scopus
Google Scholar
Right arrow Articles by Marek, M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Marek, M.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

The Effect of the Electrode Potential on the Release of Mercury from Dental Amalgam

M. Marek

School of Materials Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245

The effect of the electrode potential on the rate of mercury dissolution from the matrix phase ({gamma}1) of dental amalgam was investigated. Specimens of the Ag-Hg phase, with and without dissolved tin, were exposed to synthetic saliva and maintained at various potentials by means of a potentiostat. The amount of dissolved mercury was determined after 24 h by cold-vapor Atomic Absorption Spectrophotometry. Anodic polarization curves for the {gamma}1 specimens and pure silver and mercury were also recorded.

The results for the Ag-Hg phase showed a potential-independent dissolution rate between -0.6 and -0.1 V (SCE), followed by a sharp increase. Mercury dissolution from the Ag-Hg-Sn phase was much slower than from the tin-free {gamma} 1 phase, and potential-independent to +0.05 V (SCE); a sharp increase in mercury dissolution was observed at +0.1 V (SCE). The anodic polarization curves for the Ag-Hg-Sn phase indicated passivity between -0.67 V and +0.1 V (SCE), but no clear passivation for the Ag-Hg specimen, silver, or mercury.

The results show that in the potential-independent region, mercury dissolved in the atomic form from both the tin-free and tin-containing {gamma}1 phase. The increase in dissolution in the upper range of potentials was tentatively attributed to selective anodic dissolution of silver and an onset of electrochemical dissolution. The results indicate that the rate of mercury release from the {gamma} 1 phase of dental amalgam was not affected by potential changes due to alloying or galvanic contacts unless the potential exceeded some critical value.

Journal of Dental Research, Vol. 72, No. 9, 1315-1319 (1993)
DOI: 10.1177/00220345930720091001
Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?


This article has been cited by other articles:


Home page
 Journal of the American Dental AssociationHome page
H. W. ROBERTS, M. MAREK, J. C. KUEHNE, and J. C. RAGAIN
Disinfectants' effect on mercury release from amalgam
J Am Dent Assoc, July 1, 2005; 136(7): 915 - 919.
[Abstract] [Full Text] [PDF]

Home page
 JDRHome page
S. Olsson, M. Bergman, M. Marek, and A. Berglund
Connections between Polarization Curves and Log(ai/aref)-pe Diagram
Journal of Dental Research, December 1, 1997; 76(12): 1869 - 1878.
[Abstract] [PDF]