It was shown that the adhesion to metal was always less than to ceramic. The mean value of adhesiveness of Enamelite 500 surpasses with 1.2 daN/cm2 that of Den Mat with 0.8 daN/cm2. The bonding agent which is added to the package was replaced by the adhesive agent Fusion in a further experiment. Here the values for Den Mat increased to 1.65 daN/cm2 whilst those of Enamelite 500 decreased to 0.88 daN/cm2. In clinical trials the repairs held which were not under stress through occlusion or articulation contacts. The colour formation as well as transparency or smoothness of the material were not always satisfactory, the preparation however was quick and simple.