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使用钴铬合金、银钯合金和金合金义齿,有时发生流电病、感觉异常和慢性中毒(从金属义齿游离出的微量元素进入机体),患者唾液中有大量锌、镍、铬、锡、铁和其他微量元素,胃液中这些微量元素含量增高,并可贮存在各器官(肝、脑、骨髓等)。金合金不耐久,易磨损,口腔有银汞充填物时可发生流电现象。为克服上述缺点,作者用多层氮化物防护覆盖钴铬合金制作义齿,具有很高的抗腐蚀和抗磨损性能,对口腔组
The use of cobalt-chromium alloy, silver-palladium alloy and gold alloy dentures, sometimes flow epidemics, sensory abnormalities and chronic poisoning (trace elements released from the metal denture into the body), patients with a large number of saliva zinc, nickel, chromium, tin, Iron and other trace elements, gastric juice in these trace elements increased, and can be stored in various organs (liver, brain, bone marrow, etc.). Gold alloy is not durable, easy to wear, oral mercury amalgam can occur when the flow phenomenon. In order to overcome these shortcomings, the author made denture with multiple layers of nitride protective coating made of cobalt-chromium alloy, which has high anti-corrosion and anti-wear properties.