from the conferences organized by TANGER Ltd.
The connection between metal and ceramic occurs by physical, chemical and in small extent by mechanical forces, special attention is applied to the every stage of metal surface preparation before ceramics application. The paper presents the results of microscopic cross-sections observation of Ni-Cr-Mo coated with opaquer and dental ceramics layers. On the basis of variables sandblasting parameters found that this treatment tends to increase the diversity of the surface. Short term (because a 15-second) sandblasting makes the metal surface irregular, and the presence of hollows and hills on the surface contribute to increased adhesion between layers of opaquer and ceramic. The usage of longer sandblasting time makes that the irregularities are rather rifts and burrs. In addition, the dimensions of the resulting irregularities restrains the correct and accurate surface oxidation of the alloy, but also restrains the correct and even surface coverage within opaque Highly diverse of the alloy surface contributes to the numerous gaps, cavities and voids on the border of the metal - ceramic connection.
Keywords: Ni-Cr-Mo alloy, dental alloy, metal-ceramic system© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.