A new technology for direct restorative alloys.
A new technology for direct restorative alloys.
复制标题
直接修复合金新技术。
DOI:
10.1016/0109-5641(95)80020-4
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发表时间:
1995
期刊:
影响因子:
--
通讯作者:
Ratzker,M
中科院分区:
文献类型:
--
作者:
Dariel,MP;Lashmore,DS;Ratzker,M
Objectives. The purpose of this study was to develop a new technology for preparing mercury-free metallic dental restorative materials. Methods. The novel approach relies on the cold welding of surface-treated silver particles. At ambient temperatures, intermetallic compound formation takes place spontaneously at the silver-tin interface. The ability of a loose powder to consolidate at ambient temperature under moderate pressure and within a short time duration was investigated for various mixtures of elemental silver, tin, and pre-alloyed silver-coated powders. Surface treatment aimed at removing silver surface oxide layers is done with a dilute acid. The compressive and the transverse rupture strengths of several of the consolidated powder mixtures were determined. Cold-welding of surface-treated powder particles takes place across the silver-silver interface and is promoted by exposure to a mild acid. Powder mixtures containing approximately 50% silver powder, 40% silver-coated silver-tin intermetallic compound particles, and a small silver-tin fraction deposited from an aqueous solution display very good condensability, depending on the amount of silver-silver interface area available. The attained rupture strength values (200 Mpa) were higher than those of amalgams; the compressive strengths (120 MPa) and hardness values (100 KHN), however, were lower than those found for amalgams. Mercury-free silver-tin powder mixtures can be processed for use as metallic composite dental restorative materials.
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影响因子:
5
作者:
Y. Oshida;Moore Bk
通讯作者:
Moore Bk
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
S. Nakahara;R. McCoy
通讯作者:
R. McCoy
DOI:
--
发表时间:
1974
期刊:
Journal of Biomedical Materials Research
影响因子:
--
作者:
T. Okabe;R. Hochman;M. McLain
通讯作者:
M. McLain
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
S. Sen;A. Ghorai;Abhijit Bandyopadhyay;S. Sen
通讯作者:
S. Sen
DOI:
--
发表时间:
1991
期刊:
The Journal of the American Dental Association (1939)
影响因子:
--
作者:
I. Mandel
通讯作者:
I. Mandel