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Results for “Electrogalvanism, Intraoral”

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At least 19 recordsLinked to original sources
PubMed1982

Intraoral currents and taste thresholds.

A group of patients, with oral symptoms such as oral smart, battery taste and mental taste, were examined to study the relationship, if any, between intraoral currents, created at metallic contacts between restorative materials, and taste perception thresholds. The patients were examined with an electrogustometric method for determination of taste threshold levels. Further the intraoral currents were calculated from data obtained at potential and polarization measurements. Comparisons were then between groups of subjects with and without oral symptoms. The results of this study indicate that patients with certain oral symptoms have lower threshold levels for electric taste stimulation than persons in a control group selected at random. No differences were, however, observed between the magnitudes of intraoral currents in the two groups.

Adult↗
PubMed1984

Salivary content of patients with subjective symptoms resembling galvanic pain.

Analyses of whole and parotid saliva were performed in ten patients with subjective symptoms resembling galvanic pain and in their eight asymptomatic counterparts. Salivary flow rates, protein, IgA, lysozyme, sodium, potassium, chloride, calcium phosphate, copper, and magnesium contents were measured. The concentrations of protein, sodium, chloride, and phosphate in the whole saliva of the patients with symptoms were significantly higher, but concentrations of calcium, magnesium, and IgA were lower than in the asymptomatic controls. In parotid saliva, too, protein, lysozyme, and calcium concentrations were significantly altered in patients with oral symptoms. The analysis of free amino acids serine, proline, glutamic acid + glutamine, and glycine in the whole saliva did not show any significant differences between the two groups studied. The results suggest the importance of salivary contents in the development of oral soreness. Such changes in the salivary constituents could modulate the amount and character of the salivary macromolecules absorbed onto the teeth. This could lead to passivation or activation of the surfaces in metallic restorations and consequently to the onset of the intraoral electric currents.

Adult↗
PubMed1987

Electrical activity in dental amalgam of submerged divers during welding.

Divers performing underwater manual metal arc welding/cutting (UMMA) have complained about a metallic taste phenomenon. In several dives with voluntary leakage in their diving suits, potential alterations in dental amalgam were registered when they performed UMMA. Polarization resistance values were obtained for the test amalgam cylinders used and the diver's dental restorations. These values, along with the recorded potential values of the amalgam test cylinders and of the diver's dental restorations, enabled us to calculate the depolarizing current, using the law of Ohm. The current depolarizing the amalgam test cylinder did not differ significantly from the mean intermetallic currents between the dental restorations. The clinical effect of intraoral currents when performing UMMA welding should be regarded as small, whereas considerably higher currents should not be ruled out in an intense cutting situation.

Adult↗
PubMed1982

Potentials of and currents between dental metallic restorations.

115 persons were studied from a body of patients referred to the Faculty of Odontology, University of Umeå, for investigation regarding any occurrence of oral galvanism. Potential and polarization of metallic restorations and dentures were recorded using a method and equipment previously described. Data regarding distribution of potential ranges with respect to number of patients and type of alloy are presented. The distribution of calculated intraoral currents in relation to number and type of metallic contacts is stated. Relevant parameters for the study of oral galvanic (bimetallic) cells are discussed.

Adult↗
PubMed1993

Intraoral galvanic corrosion: literature review and case report.

This article reviewed the dental history of a patient with symptomatic electro-chemical reactions after the occlusal relationship of an existing complete gold crown and silver amalgam restoration was changed. A literature review of oral galvanism is presented with diagnostic techniques and treatment options.

Composite Resins↗
PubMed1979

The problem of corrosion and tarnish of dental restorative and implant metals.

The linear polarization technique has been used to measure polarization resistances and corrosion currents directly in the mouths of baboons and in vitro for a wide range of dental and implant alloys. Good correlations were found to exist between these two conditions, indicating that this test is accurate and valid as well as being simple to perform. Intraoral corrosion proceeded faster, probably due to abrasion by foodstuffs. Tarnish has also been measured using an intraoral tristimulus colorimeter and results were compared with the corrosion determinations. The tarnish of pure metals (Au, Ag, and Cu) was inversely proportional to corrosion. Gold alloys tarnished little but varied in corrosion current. Dental amalgams corroded the most but the tarnish experience depended more on their chemistry than their precious metal composition.

Animals↗
PubMed1991

Galvanic action: a case report.

The presence of two dissimilar metals in the mouth acting as electrodes, with saliva serving as an electrolyte, can generate an intraoral electric current known as galvanic action. The result of these circuits is usually a transient, unpleasant feeling in the mouth, but occasionally other tissues in the body can be affected. This article presents a report of a patient with a presumable galvanic action that began with the insertion of orthodontic appliances and developed into a serious, debilitating illness.

Ataxia↗
PubMed1986

An examination of the surface corrosion state of dental fillings and constructions. II. A clinical study on patients with orofacial complaints.

A group of 115 patients with orofacial complaints has been examined. A new method for intraoral measurement of electrode potentials on the surface of the amalgam fillings and prosthetic constructions has been developed and applied. The possible connections between the measured electrode potentials and patients' saliva properties and their complaints have been discussed. No correlations between measured electrode potentials of the metallic fillings and constructions and important saliva properties could be found. No connections between the measured electrode potentials and the patients' complaints could be proved.

Adult↗
PubMed1987

Plasma-selenium, glutathione peroxidase in erythrocytes and mercury in plasma in patients allegedly subject to oral galvanism.

Twelve patients with subjective symptoms, ascribed by the patients themselves to mercury released from dental restorations, were investigated. In addition to a general dental examination the following parameters were registered: the total number of amalgam surfaces in the mouth; potential and polarization of existing and accessible dental metallic restorations for calculation of intraoral currents. As regards the highest calculated intraoral current for each individual there was a statistically significant difference between the patient group and a control group consisting of 12 persons. An analysis of the amount of selenium, glutathione-peroxidase and mercury in the blood showed no differences between the patient and the control group. However, a statistically significant positive correlation could be seen between the total number of amalgam surfaces and the plasma-mercury level for patients and controls pooled together. The numerous other blood parameters analyzed did not reveal any differences between the groups.

Adult↗