Method using a colloidal suspension of the rare earth oxide as a

Details Method using a colloidal suspension of the rare earth oxide as a Method using a colloidal suspension of the rare earth oxide as a

1990-08-28

1991-07-09

Lieberman, Paul

Dentistry

Prosthodontics

Denture base construction

106 35, 264 19, 4332021, 433206, 501 17, 501 32, A61C 1300, A61C 13083, C03C 816

Patent

active

050300970

ABSTRACT:
There is provided a mixture which preferably is a colloidal suspension of finely divided particles of a rare-earth oxide such as cerium oxide in a liquid. The liquid may be all water but also may include other materials such as acetic acid, 1,3-butanediol, methanol. The mixture is used as a wetting and suspending agent for opaque and build-up dental porcelains to primarily overcome the problem of discoloration of the porcelains when used with metal substrates made of dental alloys containing silver, and also to make the porcelains easier to handle and to work with.

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