科研之友
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摘要
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 37 degrees C +/- 0.5 degrees C. 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 mu A/cm(2).
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 mu A/cm(2) by the amalgam's surface and 182.3 mu A/cm(2) by the bracket's surface).
- 出版日期2010
