Corrosion current between fresh and old amalgam

Ravnholt, G.; Holland, Roy I.

doi:10.1016/s0109-5641(88)80018-6

Cited by 13 publications

(2 citation statements)

References 22 publications

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“…Additional clinical variables like pellicle formation on fillings (17) and binding of metal ions to salivary proteins (18) make a quantitative assessment difficult. But, the corrosion rate of amalgam may be greatly increased by connecting it electrically to anotber metal (19).…”

Section: Discussionmentioning

confidence: 99%

Corrosion current and pH rise around titanium coupled to dental alloys

Ravnholt¹

1988

European J Oral Sciences

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Ra%'nholt G: Corrosion current and pH rise around titanium coupled to dental alloys. Scand J Dent Res 1988: 96: 466-72. Abstract -Corrosion reactions around titanium, usually considered biologically inert, might be provoked by coupling it galvanically with more eorrodible dental alloys. Experiments in vitro simulating tbe conditions of a titanium dental implant or root canal post coupled to an amalgam filling, demonstrated corrosion current densities up to 31 nA/cm', anodic pH values around the amalgam down to 2, and cathodic pH values around the titanium up to 10. The amounts of tin released by the enhanced corrosion of amalgam might contribute measurably to the daily intake of tbis element; tbe corrosion current generated reached values known to cause taste sensations. If the buffer systems of adjacent tissues in vivo are not able to cope with the high pH generated around the titanium, local tissue damage may ensue; this relationship is liable to be overlooked, as it leaves no evidence in the form of corrosion products.

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Section: Discussionmentioning

confidence: 99%

Corrosion current and pH rise around titanium coupled to dental alloys

Ravnholt¹

1988

European J Oral Sciences

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“…1,2,3 This phenomenon is called oral galvanism. 4,5,6,7 Dental alloys develop an anodic and cathodic pole depending on the position of metals in electrochemical series and individual variations of saliva. 8 A potential as high as 950 mV has been measured in the oral cavity between an aluminium splint and a gold crown.…”

Section: Introductionmentioning

confidence: 99%

The growth of Staphylococcus aureus and Escherichia coli in low-direct current electric fields

et al. 2013

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Electrical potentials up to 800 mV can be observed between different metallic dental restorations. These potentials produce fields in the mouth that may interfere with microbial communities. The present study focuses on the impact of different electric field strengths (EFS) on the growth of Staphylococcus aureus (ATCC 25923) and Escherichia coli (ATCC 25922) in vitro. Cultures of S. aureus and E. coli in fluid and gel medium were exposed to different EFS. Effects were determined by calculation of viable counts and measurement of inhibition zones. In gel medium, anodic inhibition zones for S. aureus were larger than those for E. coli at all field strength levels. In fluid medium, the maximum decrease in the viable count of S. aureus cells was at 10 V⋅m−1. Field-treated S. aureus cells presented ruptured cell walls and disintegrated cytoplasm. Conclusively, S. aureus is more sensitive to increasing electric field strength than E. coli.

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In-vitro-Studie der Interferenz von kieferorthopädischer Bebänderung und Füllungswerkstoffen

Baumann

Samanek

Ruppenthal³

1992

Fortschritte der Kieferorthopädie

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Discoloring and layers on bands and restorations during fixed orthodontic therapy are well known clinical phenomenon. Because of the complexity of etiological factors an in-vitro model was used in this study. Aim of the study was to examine the amounts and sort of metals which are dissolved. Therefore, respectively 25 normed MOD-cavities in Frasaco-teeth were filled with a non-gamma-2-amalgam (Amalcap plus, Vivadent) and condensed manually or mechanically. In addition, ten crowns of a high golden (Maingold SG, Heraeus) as well as a palladium basis alloy (Albabond A, Heraeus) were casted. Then they were banded with stainless steel bands (Dentaurum) and cemented with a glass ionomer cement (Ketac Cem, Espe). The probes were given into a 0.1 molar lactic acid for seven days at 37 degrees C. Using ICP (ion coupled plasma) analysis the corrosion solution was examined for elements. High levels of Zn- and Al-ion contents were found, which are components of the used cements. The filling materials themselves mainly set free small amounts of Ag, Sn or Cu. The steel band released Fe, Cr, Ni and Ti. The combination of filling material and band resulted in a higher release of most ions.

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Corrosion current between fresh and old amalgam

Cited by 13 publications

References 22 publications

Corrosion current and pH rise around titanium coupled to dental alloys

Corrosion current and pH rise around titanium coupled to dental alloys

The growth of Staphylococcus aureus and Escherichia coli in low-direct current electric fields

In-vitro-Studie der Interferenz von kieferorthopädischer Bebänderung und Füllungswerkstoffen

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