Original scientific paper
Effect of the Addition of Cast Alloy Over the Metalographic Structure of Cobalt-Chromium Castings
Tatjana Klarić-Jurković
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Krešimir Kraljević
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Tanja Matković
; Zavod za materijale Metalurškog fakulteta Sisak Sveučilišta u Zagrebu, Zagreb, Hrvatska
Abstract
Cobalt-chromium alloys are used in various reconstructive procedures in prosthodontics. They are most commonly used for metal constructions of partial prostheses. The casting procedures require more metal to melt than it is needed to fill the cast out. The excess is then separated from the casting. The possibility of re-usage of this excess alloy to make a usable casting has been investigated in many studies. The aim of this experimental study was to assess the extent of changes occurring in cobalt-chromium alloys with the addition of
various percentages of pre-cast alloys (B). The Wironium, Wironit
(Bego) and Basil S (Zlatarna Celje) alloys were investigated with the addition of0% , 25%, 50%, 75% and 100% of a pre-cast alloy (B). Results of the study showed the changes occurring in the metalographic structure and thus in the chemical composition of the
alloys to be within the acceptable limits, indicating the possibility of re-usage of the cobalt-chromium alloys, with certain limitations.
Keywords
cobalt-chromium alloys; metalo graphic structure
Hrčak ID:
99413
URI
Publication date:
15.9.1994.
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