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[Effect of investment on adaptation of the PFM coping].

作者信息

Wan H

机构信息

Department of Microbiology, Hubei Medical College, Wuhan.

出版信息

Zhonghua Kou Qiang Yi Xue Za Zhi. 1990 Nov;25(6):329-31,382.

PMID:2098227
Abstract

The purpose of this study is to investigate the influence of two investing methods, one time investment and two-time investment, to the adaptability of the PFM coping, using CW-PA base alloy and its phosphate investment. The result shows that the expansion of the investment is influenced by the investing methods (P less than 0.05). One-time investment has a larger expansion than two-time one for the cause of that it is without limit of the gypsum investment. It can compensate the Ni-Cr-Nb base alloy's contraction more fully, therefore a better fit of the PFM coping can be got.

摘要

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