Kappert H F, Ulbrich J, Gläss P, Huber H, Neumüller H
Dtsch Zahnarztl Z. 1989 Jan;44(1):50-2.
The presence of different alloys in the oral cavity may produce potential differences of up to 900 mV. In the majority of the patients this phenomenon presents no problems. Occasionally, however, disturbing sensations, such as "metallic taste", "twinging or stabbing" and "minute electric shock" are reported. In finding out on the threshold level for discomforting sensations due to galvanic potentials in different probands, a special battery operated device was developed. Using a pair of electrodes connected to metallic restorations in the mouth, this device enabled the application and adjustment of direct current voltage and a superimposed pulse spectrum to evoke sensible reactions. The trials were conducted with 102 probands. The mean value for the threshold of sensation was above 1000 mV. In solitary cases, however, the threshold level was as low as 250 mV. This method may be used as a diagnostic aid to the objective assessment of complaints due to galvanic effects in the oral cavity and for the selection of a suitable metal in sensitive patients.
口腔中不同合金的存在可能会产生高达900毫伏的电位差。在大多数患者中，这种现象不会引发问题。然而，偶尔会有患者报告出现令人不适的感觉，如“金属味”、“刺痛或针扎感”以及“轻微电击感”。为了确定不同受试者因电流电位产生不适感觉的阈值水平，研发了一种特殊的电池供电装置。该装置通过一对连接口腔内金属修复体的电极，能够施加和调节直流电压以及叠加的脉冲频谱，以引发可感知的反应。对102名受试者进行了试验。感觉阈值的平均值高于1000毫伏。然而，在个别情况下，阈值水平低至250毫伏。这种方法可作为一种诊断辅助手段，用于客观评估口腔中电流效应引起的不适主诉，并为敏感患者选择合适的金属。
