Title:
【発明の名称】黄変防止に優れた歯科用焼付陶材
Document Type and Number:
Japanese Patent JP2561278
Kind Code:
B2
Abstract:
PURPOSE:To obtain the titled porcelain material resistant to yellowing phenomenon in the baking of the porcelain material on a porcelain-baking alloy composed mainly of a silver-containing palladium without considerably varying the physical properties of the porcelain material, by including a nitric acid compound into a baking porcelain for dental use. CONSTITUTION:Total or a part of a principal composition constituting a baking porcelain material for dental use, e.g. opaque, body, incisal or translucent is surface-treated with an aqueous solution of a nitric acid compound and dried. As an alternative method, said porcelain material is mixed with 0.2-2.0wt.% of an insoluble or scarcely soluble nitric acid compound to include the nitric acid compound into the porcelain material. An artificial dental crown having a color tone close to that of natural tooth can be produced with normal operation by the above process. The obtained artificial dental crown is resistant to the yellowing phenomenon (yellow discoloration) caused by silver and developed in the application and baking of the porcelain material on an inexpensive and easily solderable porcelain-baking alloy composed mainly of a silver-containing palladium without considerably varying the physical properties of the porcelain material.
Inventors:
KUZE MASAO
NISHIMOTO SEIJI
NISHIMOTO SEIJI
Application Number:
JP14746087A
Publication Date:
December 04, 1996
Filing Date:
June 10, 1987
Export Citation:
Assignee:
SHOFU KK
International Classes:
A61K6/02; A61C13/083; C04B35/00; (IPC1-7): A61K6/02; A61C13/083; C04B35/00
Domestic Patent References:
| JP5914442B2 |
Attorney, Agent or Firm:
Aoyama Ryo (2 outside people)