Some properties of dental ceramics.
Some properties of dental ceramics.
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牙科陶瓷的一些特性。
DOI：
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发表时间：
1975
影响因子：
2.9
通讯作者：
H. Wilson
中科院分区：
文献类型：
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作者：
Derek W. Jones;H. Wilson
牙科修复体的美学要求相当严格，这在很大程度上决定了牙科陶瓷材料的组成。所谓的牙科瓷器是从长石、粘土和石英的传统白瓷配方演变而来的。可以考虑的第一个变量之一是化学成分。然而，人们普遍认为，对于陶瓷材料来说，组成上的微小变化并不重要。自1918年瓦茨的早期工作以来，人们对牙科瓷器的化学成分几乎没有兴趣。正如Jones(1971)所讨论的那样，传统牙科瓷器的成分经过多年的实践试验和错误而演变。牙科瓷器的发展发展到了这样一个地步，即只有像McLean&Hughes(1965)所倡导的那样，通过对成分和技术进行重大改变才能实现物理性能的任何重大改进。由此开发的氧化铝/玻璃复合材料使用了一种技术，该技术涉及建立一个内芯，该内芯包含高比例的晶态氧化铝(45%-50%)嵌入由透明的外层贴面包围的玻璃基质中。这项工作比较了这些相互关联的变量的影响，如成分、填料夹杂物、粘度、质地、硬度和烧成产品的强度。
The rather exacting aesthetic requirements of dental restorations has largely dictated the composition of dental ceramic materials. The so-called dental porcelains have evolved from the traditional whiteware formula of feldspar, clay and quartz. One of the first variables which might be considered is that of chemical composition. It is, however, generally accepted that for ceramic materials small variations in composition are not critical. Since the early work of Watts in 1918, little interest has been expressed in the chemical composition of dental porcelain. The composition of traditional dental porcelains has evolved over a period of many years by practical trial and error, as discussed by Jones (1971). The development of dental porcelains advanced to the point where any major improvements in physical properties could only be achieved by major changes in composition and technique as advocated by McLean & Hughes (1965). The resulting alumina/glass composites which have been developed use a technique which involves the build up of an inner core which contains a high proportion of crystalline alumina (45-50 %) embedded in a glass matrix surrounded by a transparent outer veneer. This work compares the effect of such inter-related variables as composition, inclusion of filler, viscosity, texture, hardness, and strength of the fired product.