Johnson A, Winstanley R B
Department of Restorative Dentistry, School of Clinical Dentistry, University of Sheffield, England.
Int J Prosthodont. 1996 Jan-Feb;9(1):74-8.
An evaluation of the castability of metal ceramic alloy-investment combinations using a mesh test and utilizing a factorial design concept has shown that different metal ceramic alloys (gold-based, palladium-based, and nickel-chromium-based alloys) react differently, as far as castability is concerned, to various factors involved in the casting process. These factors were divided into two groups: procedural factors, that included sprue diameter, investing technique, and melting and casting method; and operator factors, which included alloy casting temperature, mould temperature, and heat-soak times. Each of these factors had two or three levels.
使用网格试验并运用析因设计概念对金属陶瓷合金与包埋材料组合的铸造性能进行评估，结果表明，就铸造性能而言，不同的金属陶瓷合金（金基、钯基和镍铬基合金）对铸造过程中涉及的各种因素反应不同。这些因素分为两组：程序因素，包括浇道直径、包埋技术以及熔化和铸造方法；操作人员因素，包括合金铸造温度、铸模温度和热浸泡时间。这些因素中的每一个都有两个或三个水平。
