Abstract
Development of dentistry is strongly correlated with the new treatment method development and construction of metal, polymer and ceramic materials. Metal-ceramic crown is a common dental prosthesis. The aim of work was determination the causes of the ceramic coating spalling from the cobalt chrome metal frame. It is proposed to replace the standard sandblasting method to plasma electrolytic treatment. The burning of single microdischarges occurs during plasma-electrolytic process. The formation of the microwells and increasing surface roughness observed in cathode mode. This is due to local melting of the surface. The treated surface does not contain impurity elements that can cause the formation of microcracks.
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