TECHNOLOGICAL FEATURES IN FABRICATION OF Co-Cr DENTAL ALLOY BY SELECTIVE LASER MELTING

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  • TITLE: TECHNOLOGICAL FEATURES IN FABRICATION OF Co-Cr DENTAL ALLOY BY SELECTIVE LASER MELTING
  • AUTHOR(S): Tsanka Dikova
  • ABSTRACT: The process of selective laser melting (SLM) is an alternative to the conventional technologies and can be used to solve many of their problems. During SLM process, an object is produced directly from a virtual 3D model by melting a metal powder layer by layer using a laser. Incorrectly selected process parameters can lead to defects decreasing the details quality. The purpose of the present paper is to analyze the peculiarities of the production of dental Co-Cr alloy by SLM method and to propose technological regimes for manufacturing of fixed partial dentures with high density. Four-component dental bridges are used as samples, which are made of Co212-f ASTM F75 alloy using SLM 125 machine. The accuracy and structure of the specimens are investigated by OM and SEM. The influence of technological parameters of the SLM process on the quality of the details is analyzed. It is found that in order to ensure high accuracy of the constructions, it is necessary to make changes in the dimensions at the stage of the virtual model, as the corrections are the same on all axes. Optimal technological parameters - laser power and scanning speed are calculated and proposed, which provide a dense structure and high mechanical properties of the details, manufactured of Co-Cr dental alloy by SLM method with the equipment used. The results of this study will be useful for successful implementation of the SLM equipment in dentistry for production of high quality Co-Cr constructions.
  • PAGES: 34-
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