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Effects of selective laser melting process parameters on the accuracy of the intaglio surface of maxillary removable partial denture frameworks

Hu Chen (Center of Digital Dentistry, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices and Beijing Key Laboratory of Digital Stomatology and NHC Research Center of Engineering and Technology for Computerized Dentistry, Beijing, China)
Kenan Ma (Center of Digital Dentistry, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices and Beijing Key Laboratory of Digital Stomatology and NHC Research Center of Engineering and Technology for Computerized Dentistry, Beijing, China and Institute of Medical Technology, Peking University Health Science Center, Beijing, China)
Yongsheng Zhou (Department of Prosthodontics, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices and Beijing Key Laboratory of Digital Stomatology and NHC Research Center of Engineering and Technology for Computerized Dentistry, Beijing, China)
Yong Wang (Center of Digital Dentistry, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices and Beijing Key Laboratory of Digital Stomatology and NHC Research Center of Engineering and Technology for Computerized Dentistry, Beijing, China)
Yuchun Sun (Center of Digital Dentistry, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices and Beijing Key Laboratory of Digital Stomatology and NHC Research Center of Engineering and Technology for Computerized Dentistry, Beijing, China, and Institute of Medical Technology, Peking University Health Science Center, Beijing, China)

Rapid Prototyping Journal

ISSN: 1355-2546

Article publication date: 19 April 2022

Issue publication date: 14 October 2022

211

Abstract

Purpose

This in vitro study aims to explore the effects of selective laser melting (SLM) process parameters on the accuracy of the intaglio surface of cobalt–chromium alloy (Co–Cr), commercially pure titanium (CP Ti) and titanium alloy (Ti–6Al–4V) maxillary removable partial denture (RPD) frameworks and optimize these process parameters.

Design/methodology/approach

Maxillary RPD framework specimens designed on a benchmark model were built. The process parameters, including contour scan speed and laser power, infill scan speed and laser power, hatch space, build orientation and metallic powder type, were arranged through the Taguchi design. Three-dimensional deviations of the clasps area, connector area and overall area of maxillary RPD frameworks were analyzed by using root mean square (RMS) as a metric. One-way analyses of variance with the above RMSs as the dependent variable were carried out (α = 0.05).

Findings

Maxillary RPD frameworks built horizontally had a more accurate intaglio surface than those built at other orientation angles; CP Ti or Ti–6Al–4V maxillary RPD frameworks had a more accurate intaglio surface than Co–Cr ones; the Maxillary RPD framework built with a higher infill scan speed and lower infill laser power had the more accurate intaglio surface than the one built with other levels of these two process parameters.

Originality/value

A novel benchmark model for evaluating the accuracy of the intaglio surface of maxillary RPD frameworks manufactured by SLM is proposed. The accuracy of the intaglio surface of maxillary RPD frameworks can be improved by adjusting SLM process parameters. The optimal setting of process parameters concerning the accuracy of the intaglio surface of maxillary RPD frameworks was given.

Keywords

Acknowledgements

This work was supported by National Key R&D Program of China [2019YFB1706900], Capital’s Funds for Health Improvement and Research [2022-2Z-4106], Beijing Training Project for the Leading Talents in S&T [Z191100006119022], National Key Program of National Natural Science Foundation of China [51705006], and Open Fund of Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials [KF2020-04].

Authors contribution: Hu Chen and Kenan Ma contributed equally to this article and should be considered co-first authors.

Citation

Chen, H., Ma, K., Zhou, Y., Wang, Y. and Sun, Y. (2022), "Effects of selective laser melting process parameters on the accuracy of the intaglio surface of maxillary removable partial denture frameworks", Rapid Prototyping Journal, Vol. 28 No. 9, pp. 1625-1635. https://doi.org/10.1108/RPJ-11-2021-0324

Publisher

:

Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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