Use of low-gold noble-metal alloys for dental purposes

摘要

The alloys have good material bonding between the metal structure and the dental ceramic, have good processing properties, are not brittle at elevated temperature, do not discolour, in particular when the ceramic is fired, and in addition are inexpensive. Silver-containing alloys tend to discolour the ceramic; alloys containing a small amount of silver or none at all tend to be brittle at elevated temperatures. Surprisingly, it has been found that the disadvantages described do not occur if platinum and/or at least one of the transition metals from sub-group 4, 5 and 6 of the Periodic Table of the Elements are added to the low-gold noble-metal alloys.