银汞合金做为牙科充填材料,虽有久远历史,但至今仍普遍应用。医务人员在长期使用的过程中,对其汞害也逐渐有所认识。汞在室温下就可蒸发并随空气流动,因而在调制、充填、磨除汞合金充填物的过程中挥发的汞即可吸附于诊室的天棚、地板、墙壁、桌椅及器械上,成为经久不断的污染源致使医护人员的慢性中毒。汞的蒸发量与汞的表面积大小成正比,因而洒落、废弃的汞毒害更大,若室温高则蒸 Silver amalgam as a dental filling material, although a long history, but still widely used. Medical personnel in the long-term use of the process, its mercury also gradually become aware of. Mercury evaporates at room temperature and travels with the air. Therefore, mercury volatilized during the preparation, filling, and amalgam filling can be adsorbed to the ceiling, floor, walls, tables, chairs, and equipment of the clinic to become durable Continuous pollution causes chronic poisoning of health care workers. Mercury evaporation and mercury surface area is proportional to the size, so spilled, abandoned mercury poisoning more, if the room temperature is high, then steamed