title: [Effect of investment on adaptation of the PFM coping].
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.
authors.affiliation: Department of Microbiology, Hubei Medical College, Wuhan.
authors.forename: H
authors.initials: H
authors.lastname: Wan
mesh_terms: D003722:Dental Alloys; D003734:Dental Casting Investment; D003735:Dental Casting Technique; D003776:Dental Porcelain; D003830:Denture, Partial, Fixed
chemical_list: D003722:Dental Alloys; D003734:Dental Casting Investment; D003776:Dental Porcelain