Fatigue strength of dental metal-ceramics

The problem of fracture between the ceramic layer and the metal basis of a dental replacement is a significant problem in prosthetic dentistry. In an effort to find a combination of materials, which would satisfy complex requ irements of modem dentistry, dental industry has a large number of alloys a nd ceramic materials at disposal. The problem is how to join an alloy and a ceramics into a uniform whole with unbreakable linkages, and to combine pa rticular properties of both materials to satisfy high aesthetic and functio nal requirements in the conditions of dynamic loading resulting from the cy clic processes of chewing in the mouth. A high fatigue strength of the link age of a metal and a ceramics is a basic prerequisite of a successful work in fixed prosthetic; in addition, it is a very important property, if not t he most important, in choosing a material for clinical application. Measuri ng the fatigue strength of the metal-ceramic system Ag-Pd alloy (Oceramduo) and hydrothermal ceramics (Duceragold), and comparing it to the values of other modern metal-ceramic systems, it can be concluded that our tested sys tem is comparable with respect to the mechanical properties of other simila r systems.