Sorry guys the study is only in German but done on real cemented crowns on metal stumps 1.2 million chewing cycles with temperature change from 5 to 55 deg c always 8 crowns of one material and what do we see no breakage but degradation of the materials especially the high yttrium stabilized like cube x and all the the others ( Katana HTML, UTML, AG Zolid and so on ) would show same results i think 39 % degradation !!!!! 3 unit brigde ??? crap preparation ??? thinn margin ??? shit cemented ???? is this a long run burner ??!! with conventional cementation ?? just a few question nothing to fear.