Experimental analysis of peculiarities of the metal-ceramic samples surface relief morphology depending on the abrasive procession methods

Abstract

One of the most frequent complications during the use of metal-ceramic prostheses is destruction of facing ceramic layer. Its restoration depends on many factors, among them its roughness parameters. In order to study the influence of surface treatment of metal samples on its morphology two processing methods were used in experiment – abrasive head («Komet», Gebr. Brasseler, Germany) and intraoral sandblastering (Danville MicroEtcher IIA, Danville Materials, USA). It was found that the degree of roughness depends on the preparation of metal surfaces, in particular,intraoral sandblasting forms a smooth,regular and more expressed microrelief of the metal surface, while the use of abrasive head creates heterogeneous relief due to uncontrolled pressure. This can lead to unwanted tense areas and adversely affect the subsequent reliability of composite restorations. Key words: metal-ceramic dentures, composite materials, morphology.