Transactions on Additive Manufacturing Meets Medicine
Vol 1 No 1 (2019): Trans. AMMM
https://doi.org/10.18416/AMMM.2019.1909S03P25

Imaging and Modelling in 3D Printing

The challenge of repeatable manufacturing and the influence on the anchoring strength at the example of press-fit acetabular cups

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Volker Weißmann (Faculty of Engineering, University of Applied Science, Technology, Business and Design, Wismar, Germany and Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics, University Medicine Rostock, Germany), Harald Hansmann (Faculty of Engineering, University of Applied Science, Technology, Business and Design, Wismar, Germany), Rainer Bader (Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics, University Medicine Rostock, Germany), Christian Boss (Institute for Polymer Technologies, Wismar, Germany), Anton du Plessis (CT Scanner Facility, Central Analytical Facilities, Stellenbosch University, Stellenbosch South Africa)

Abstract

In the present study, the SLM process and Ti6Al4V were used to produce an acetabular cup design suitable for experimental purposes. The acetabular cups with load-bearing, open-pored structures on the acetabular surface were evaluated experimentally to evaluate the anchoring strength. A microscopic measurement was performed to evaluate the manufacturing accuracy and the press fit. The characterization of the global and local geometric conditions was performed using Micro-CT. While the press-fit determined by microscopic evaluation shows no correlation to the different anchorage strengths, the geometric deviation from the design specification in the press-fit area determined by micro-CT shows a significant correlation.

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