抄録
Metal ceramic restorations have been used extensively for several years. A number of alternative noble and base metal alloys for porcelain have become available in recent years, but all of them have disadvantages. Some methods using titanium as a substrate for metal ceramic restoration have been tried because of the desirable properties such as excellent biocompatibility, mechanical properties, good corrosion resistance and relatively low cost. However, some disadvantages arise because of high reactivity of titanium with certain elements, especially oxygen, which makes good bonding to porcelain difficult.
The purpose of this study was to investigate the oxidation on the titanium surface during porcelain firing and to develop better bonding. The heat treatment of the metal in H2 atmosphere before porcelain application had an effect on the bond strength between pure titanium and porcelain. It was considered that the titanium oxide volume should be controlled between the titanium and the porcelain for good bonding.
