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Selective laser melting (SLM) of pure gold for manufacturing dental crowns

Khan, Mushtaq; Dickens, Phill

Authors

Mushtaq Khan

Phill Dickens



Abstract

Purpose

This paper aims to present the application aspect of the work to manufacturing premolar and molar dental crowns by selective laser melting (SLM) of pure gold. Over the years different metals have been processed using laser-based Additive Manufacturing processes, but very little work has been published on the SLM of gold (Au). Previously published work presented suitable processing parameters for SLM of pure gold.

Design/methodology/approach

Suitable processing parameters were used to manufacture premolar and molar dental crowns using SLM system. Different layer thickness was used to analyse the effect on surface quality of crowns. Mechanical properties are checked using nanoindentation and micro Computerized Tomography scanning.

Findings

Dental crowns were successfully manufacturing using new build platform and suitable processing parameters. Parts were manufacturing using minimal supports which prevented parts from damaging during removal. A bed temperature of 100°C was found suitable for reducing warpage in the layers. Layer thickness of 50μm was found to have better surface quality and structural integrity as compared to 75μm. Porosity was found to be predominantly inter-layer. Small difference in mechanical properties of dental crowns is associated with the laser processing.

Originality/value

This research is the first of its kind which presents dental crown manufacturing using SLM of pure gold.

Journal Article Type Article
Publication Date Oct 31, 2014
Journal Rapid Prototyping Journal
Print ISSN 1355-2546
Electronic ISSN 1758-7670
Publisher Emerald
Peer Reviewed Not Peer Reviewed
Volume 20
Issue 6
APA6 Citation Khan, M., & Dickens, P. (2014). Selective laser melting (SLM) of pure gold for manufacturing dental crowns. Rapid Prototyping Journal, 20(6), doi:10.1108/RPJ-03-2013-0034
DOI https://doi.org/10.1108/RPJ-03-2013-0034
Keywords Selective laser melting, Dental crowns, Porosity, Pure gold
Publisher URL https://doi.org/10.1108/RPJ-03-2013-0034
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