1. bookVolume 32 (2019): Issue 2 (June 2019)
Journal Details
License
Format
Journal
eISSN
2300-6676
ISSN
2084-980X
First Published
30 May 2014
Publication timeframe
4 times per year
Languages
English
access type Open Access

Effect of addition of recast materials on characteristics of Ni-Cr-Mo alloys

Published Online: 02 Jul 2019
Volume & Issue: Volume 32 (2019) - Issue 2 (June 2019)
Page range: 71 - 76
Received: 08 Jun 2018
Accepted: 12 Oct 2018
Journal Details
License
Format
Journal
eISSN
2300-6676
ISSN
2084-980X
First Published
30 May 2014
Publication timeframe
4 times per year
Languages
English
Abstract

The purpose of this study was to assess the effect on selected mechanical properties, of adding recast materials to the NiCrMo alloy of newly produced castings.

Three groups of dental alloy NiCrMo (trade named Remanium CS+) were prepared by mixing 50% new alloy to alloy remnants from previous castings. The specimens in the first casting group used 100% new alloy and served as control (C1). The second group consisted of equal amounts of new alloy and alloy remnants cast only once (C2). The third group contained 50% of new alloy and alloy cast twice (C3). Microstructural analysis was performed and the chemical composition, hardness and the metal-ceramic bond strength were assessed. In addition, EDS analysis (mapping) was undertaken. Hardness and bond strength results were also statistically analysed.

In spite of the fact that recasting brought about small changes in hardness and chemical composition (C, Cr and Mo), these effects were found to not affect their functional properties in the oral cavity. Still, significant differences between new alloy and the recasted groups (p < 0.05) were demonstrated in the course of statistical analysis of Vickers hardness test (for α = 0.05). All analysed research groups have a similar average adhesion at 48.51÷49.24 MPa (p > 0.05).

The recasting procedure described in the paper can be done safely in dentistry. If previously casted material is used, it should be mixed with new material. The use of the material prepared in this way can lower the costs of NiCrMo castings.

Keywords

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