共 2 条
[1]
Lewis A J, 1975, Aust Dent J, V20, P161
[2]
LEWIS AJ, 1978, J PROSTHET DENT, V39, P2
RADIOGRAPHIC EVALUATION OF POROSITIES IN REMOVABLE PARTIAL DENTURE CASTINGS
被引：17
作者：
LEWIS, AJ
机构：
[1] University of Western Australia, Dental School, Perth, WA
关键词：
D O I：
10.1016/S0022-3913(78)80095-X
中图分类号：
R78 [口腔科学];
学科分类号：
1003 [口腔医学];
摘要：
Most of the removable partial denture castings examined showed radiographic evidence of internal porosity. In general the porosity occurred in characteristic regions associated with abrupt changes in cross-sectional thickness. These were located either within the partial denture framework or at the casting-sprue junctions. The porosity is due to metal shrinkage caused by a premature solidification at some point, which in turn interferes with a controlled unidirectional solidification of the casting. © 1978 C. V. Mosby Company.
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页码：278 / 281
页数：4
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