Title:
歯科用高温石膏系埋没材
Document Type and Number:
Japanese Patent JP4090101
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an embedding material capable of obtaining a casting of excellent quality by using a heat-resistant material consisting of a metallic oxide, gypsum hemihydrate, and a carbon oxidant to oxide carbon to suppress the pyrolysis of the gypsum even when carbon such as residual wax is still present. SOLUTION: A carbon oxidant is preferably either or both of ammonium nitride, and lithium nitride. The carbon oxidant may consist of one or more kinds of materials to be selected from sodium nitrate, potassium nitrate, magnesium nitrate, calcium nitrate, strontium nitrate, barium nitrate, management oxide, potassium permanganate and potassium perchlorate. The addition amount of the carbon oxidant is preferably 1-3 pts.wt. Examples of the heat-resistant material includes alumina, magnesia, zirconia, and synthesized aluminum silicate, and one or more kinds are selected therefore for use.
Inventors:
Kenichi Otsuka
Atsushi Matsumoto
Yoichi Fukuda
Kiyoko Saka
Kazuhiro Yamada
Tatsuhiko Hirata
Atsushi Matsumoto
Yoichi Fukuda
Kiyoko Saka
Kazuhiro Yamada
Tatsuhiko Hirata
Application Number:
JP4904798A
Publication Date:
May 28, 2008
Filing Date:
February 12, 1998
Export Citation:
Assignee:
Noritake Company Limited
International Classes:
A61C13/20; B22C1/08; A61K6/00
Domestic Patent References:
| JP9220638A | ||||
| JP5246818A | ||||
| JP52094696A | ||||
| JP2008992B2 | ||||
| JP2515161B2 |
Attorney, Agent or Firm:
Yoshiyasu Takahashi
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