铸造对磁性附着体衔铁耐腐蚀性能的影响

Influence of casting process on the corrosion resistance of the magnetic attachment keeper

目的 :评价磁性附着体衔铁AUM20衔铁用2种铸造方法处理后在人工唾液中的腐蚀性能的变化。方法 :AUM20衔铁分别与Co-Cr合金,BioHeradoN贵金属合金铸接后形成的试件浸泡在人工唾液中,分别在10天、20天取出5ml人工唾液进行检测。以电感耦合光谱分析仪测定浸泡液中溶出的金属离子浓度。结果 :钴铬合金、金合金铸接处理的试验件Fe离子Mo离子的析出量与对照组比较,具有显著差异。结论 :铸造会减低衔铁金属在口腔环境中的耐腐蚀性。

Objective The objective of this study was to evaluate the differences in the corrosion properties of a magnetic attachment keeper processed using the 2 treatments of alloy casting in artificial saliva. Methods Magnetic attachment keepers were treated with Ni-Cr metal alloy and gold noble metal alloy, forming samples to be immersed in artificial saliva and tested 10and 20 d after treatment. An inductively coupled spectrum instrument was used to detect the ionic(Fe and Mo)concentrations in the soak solution. Results The results of comparing the test samples of the Co-Cr alloy and gold alloy casting with samples from the control group showed that the values of metal ions in the former 2 groups were significantly higher than that in the control. Conclusion The casting process decreases the keeper’s resistance to corrosion in the oral environment.