Introduction: Metal-Porcelain restorations are nowadays the most widely used fixed-prosthetic tooth replacement, which in turn poses many issues in this field. The metal-porcelain coating consists of a metal frame that gives the porcelain support and to which the porcelain is mechanically and chemically bound. The properties of the material derive from its internal structure, which includes material defects (dotted, linear, spatial), the distribution of atoms in the material (amorphous, crystalline structure) and the bond between atoms (chemical bonds). Separate: mechanical properties, physical properties and microstructure. Purpose: The purpose of the diploma work is to investigate the effect of the consistency of the porcelain mass in relation to the properties of the metal porcelain coating. Methods of work: In the diploma work we used a descriptive method of work with literature review. The results of the diploma work include test subjects that were sintered with higher stage of wetness and those that were sintered with a lower stage of wetness of the porcelain mass on which we performed a bend test and a microstructure examination under a light microscope. Results: The results show how porcelain samples with a higher stage of wetness and those with a lower stage wetness behave in the bending test, the hardness test after Vickers and their microstructure, which was analyzed using a light microscope. Discussion and conclusion: In examining the results, we established, that the lower wetting tester has a better bending strength, microstructure, and hardness than a tester with a higher stage of wetness. We did not find any differences in color, so we can say that they are very similar in color. The findings tell us that it is better if the porcelain mass is dried with a dryer before sintering. This will give us better results and a better quality product.
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