低贵金属含量合金铸造精度的研究

A Study of Casting Accuracy of Two Low-Noble Alloys

目的 对低贵金属含量合金铸造精确程度进行比较评价。方法 采用剖切法测量并比较了研制的两种低贵金属含量合金和三种临床常用非贵金属合金的冠边缘精确度。结果 两种低贵金属合金冠边缘完整、锋利,三种非贵金属合金则出现程度不等的冠边缘缺陷、边缘圆钝。边缘浮出量由小到大依次为:金钯合金、银钯合金、钴铬合金、镍铬合金、铜铝合金。结论 两种低贵金属合金的铸造精度良好,能够满足临床要求。

Objective To evaluate the casting accuracy of two low-noble dental alloy systems.Methods The casting accuracy of two low-noble and three base metal alloy systems was measured and compared by examining the marginal fitness of dissected complete crowns. Results The complete crowns made of two low-noble alloys had margin more integrated and much sharper than those made of base metal alloys. The marginal discrepancy of crowns made of base metal alloys was much larger than that of crowns made of two low-noble alloys. Conclusion The two low-noble alloys had good casting accuracy and could satisfy the clinical requirements.