Abstract
For a long time, gold alloys have been used as metalic materials in dentistry, because they have good chemical and physical properties.
In the field of dermatology, it has been reported that the metal allergies are caused by dental materials and cosmetics.
Gold alloys are basically resistant to corrosion,releasing only minute amounts of ions.
An exposed titanium surface reacts with oxygen to form a tough and tenacious oxide film. It is believed this oxide film is responsible for excellent bio-compatibility of titanium alloy.
We developed Au-1.5%Ti alloy, which can form the oxide film. An oxide titanium layer was formed on the surface of this alloy, which was observed by X-ray microanalyser, after heat treatment.
This fact improved the bio-compatibility of the Au-1.5%Ti alloy.
