MICROSTRUCTURE FEATURES OF DENTAL PROSTHESES FROM CO-CR BASED ALLOY AFTER SELECTIVE LASER MELTING AND THERMAL TREATMENT

1 Drápala Jaromír
Co-authors:
1 Losertová Monika 1 Rodryč Vojtěch 1 Konečná Kateřina 2 Svoboda Rostislav 2 Mahdal Ondřej
Institutions:
1 Vysoká škola báňská – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Av. 17. listopadu 15, 708 33 Ostrava – Poruba, Czech Republic, EU, e-mail:Jromir.Drapala@vsb.cz
2 SINTEO Dental s.r.o., Rybkova 9, 602 00 Brno, Czech Republic, EU
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
1374-1381
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
98 views / 42 downloads
Abstract

Co-Cr based alloys usually produced by conventional casting or newly by direct metal laser sintering (DMLS) have been widely used in dentistry as dental prostheses. This work is focused on the powder size and chemical composition of initial powder particles of a commercial Co-Cr based alloy, as well as on the microstructure after DMLS and heat treatment. Material used in this study is a Co-Cr-Mo-W based alloy in a fine powder form (EOS Cobalt Chrome SP2 type). Its composition corresponds to type 4 CoCr dental materials in EN ISO 22674:2006 standard. It also fulfils the chemical and thermal requirements of EN ISO 9693 for CoCr PFM (porcelain fused metal). In order to solve the problem of porosity and shape stability of prostheses after high temperature annealing, microstructure and phase evaluation using optical and scanning electron microscopies completed by EDX analysis were performed.

Keywords: CoCr alloys, direct metal laser sintering, heat treatment, microstructure, porosity

© 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.

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