The role of microorganisms, changes of temperature in oral environment, mechanical action ( mastication and brushing), eating habits, oral sanitation etc., also influence the release of metal ion. 同时,微生物的作用,口腔环境中温度的变化,咀嚼、刷牙等机械应力,饮食习惯,口腔卫生状况等因素,也会对修复体金属离子的释放造成影响。