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1·Objective To study the effect of the pH of artificial saliva on potential of the dental surface.

目的研究人工唾液酸度对牙齿表面电位的影响。

2·Methods The circuits of instantly different metallic contact were simulated in artificial saliva, and electrical potential of every couple and 15 currents of instant contact were measured.

方法：在人工唾液中体外模拟异种合金瞬间咬合接触时的回路，浸泡初记录各偶对的电位及15个瞬间接触电流值。

3·Conclusions: Artificial saliva and Chinese traditional medicine are effective for radiation xerostomia, and they can improve the quality of life for patients with salivary gland dysfunction.

结论：使用人工唾液和中药能减轻放射性口干，促进唾液腺功能的恢复，提高患者的生活质量。