Metallic dental materials in patient's oral cavity acting as electrodes of electrochemical cells
✍ Scribed by W. Opydo; J. Opydo-Szymaczek
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- German
- Weight
- 110 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0947-5117
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✦ Synopsis
Abstract
The work was aimed at studying of standard potentials of commonly used metallic dental materials and determining of the effect of saliva conductivity and reaction on value of the potentials. The following materials have been examined: gold alloy (a material used for crowns and bridgeworks), chromium‐cobalt alloy (for frameworks in removable partial dentures), and silver amalgams (used for fillings) manufactured by three different companies.
Taking into account that mucosa makes one of the electrodes existing in oral cavity the rest potentials of mucosa have been in vivo measured in several patients. Their values, converted with respect to NHE, oscillated within the range from + 0.31 V to + 0.47 V.
Among metallic dental materials examined in the experiment maximal standard potential was found for the gold alloy, further materials having lower potentials, in decreasing order, were chromium‐cobalt alloy, and the amalgams Amalcap Plus, ANA 2000 and Septalloy.
Significant differences between standard potentials of examined materials and mucosa indicate spontaneous formation of galvanic cells of electromotive force reaching even about 0.6 V.