【摘要】 目的:研究不同pH值对口腔修复常用合金间瞬间电偶电流的影响。方法:在3种pH值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。结果:金合金与纯钛在3种pH值中偶合所测得的电流与其他偶对差别均有统计学意义(P<0.05);金合金与无锌银汞、含锌银汞偶合产生的电流,仅次于金合金与纯钛偶合产生的电流;纯钛与无锌银汞、含锌与无锌银汞产生的电流也较大;纯钛与含锌银汞在3种pH值的溶液中产生电流最低、与其他偶对差别均有统计学意义(P<0.05)。结论:金合金与纯钛偶合,在3种pH值的溶液中产生电流均为最大,临床上危害最大;金合金与无锌、含锌银汞偶合,纯钛与无锌银汞、含锌与无锌银汞产生的电流也较大,临床慎用。纯钛与含锌银汞在3种pH值溶液中产生电流均处于最低,临床可共存应用。更多还原

【Abstract】 Objective:To study the effect of pH on intermittent galvanic current of commonly used dental restorative alloys.Methods:The circuits of instantly different metallic contact were simulated in artificial saliva with 3 different pH values(5.6,6.8 and 7.6),and electrical potential of every couple and 15 currents of instant contact were measured.Results:The current of gold/pure titanium was higher than that of the other couples(P<0.05) in the three pH value solutions.The current produced by couples of pure titanium/ zinc-free amalgam and zinc-containing/zinc-free amalgam were also quite high. The current between pure titanium/zinc-containing amalgam was lower than that produced by other couples(P<0.05) in the three pH value solutions.Conclusion:Couple of pure titanium/zinc-containing amalgam can coexist in oral cavity due to its low current.更多还原