Analysis of Environmental Factors Impacting Galvanic Current Appearance within the Oral Cavity; in vitro Study
Agata Żółtowska1, Barbara Kochańska1, Michał Penkowski2, Bogna Racka-Pilszak3
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1Department of Conservative Dentistry, Medical University of Gdańsk, Orzeszkowej 18, 80-208 Gdańsk, Poland
2Department of Physics and Biophysics, Medical University of Gdańsk, Dębinki 1, 80-211 Gdańsk,
3Department of Orthodontics, Medical University of Gdańsk, Al. Zwycięstwa 42c, 80-210 Gdańsk, Poland
Pol. J. Environ. Stud. 2010;19(4):833–839
The aim of the present study was to evaluate how chosen factors of diet impact the galvanic currents appearance, when different generations of amalgams and Cr-Ni orthodontic brackets were present. For the study 12 cells, which can occur in the oral cavity, were set. The experiments were run in 3 arrangements: orthodontic bracket-Stabil B amalgam, orthodontic bracket-Amalcap plus amalgam, orthodontic bracket-Lojic+ amalgam. Four electrolytes (with different pH) were applied: artificial saliva, apple juice, orange juice, and Coca-Cola. The measurements of current intensity were performed in a thermostatic chamber of organic glass, connected to a thermostatic water bath. The temperature was stabilized at 37ºC±0.5ºC. The distance between opposing test surfaces was 60 mm. In this study, the corrosion tendencies of alloys were investigated by measuring the current between electrodes as a function of time. The current density by the surface of the electrodes was expressed in μA/cm2. The influence of low pH drinks on the appearance of galvanic currents was found. The highest initial volume of current density was observed in the orthodontic bracket-Stabil B cell, orange juice electrolyte employed (66.4 μA/cm2 by the amalgam's surface and 182.3 μA/cm2 by the bracket's surface).