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Impact of Particle Size of Ceramic Granule Blends on Mechanical Strength and Porosity of 3D Printed Scaffolds

Faculty of Mechanical Engineering and Marine Technology, University of Rostock, Justus-von-Liebig Weg 6, 18059 Rostock, Germany
Author to whom correspondence should be addressed.
Academic Editor: Andrew J. Ruys
Materials 2015, 8(8), 4720-4732;
Received: 18 March 2015 / Revised: 21 July 2015 / Accepted: 21 July 2015 / Published: 24 July 2015
(This article belongs to the Special Issue Bioceramics)
PDF [2462 KB, uploaded 24 July 2015]


3D printing is a promising method for the fabrication of scaffolds in the field of bone tissue engineering. To date, the mechanical strength of 3D printed ceramic scaffolds is not sufficient for a variety of applications in the reconstructive surgery. Mechanical strength is directly in relation with the porosity of the 3D printed scaffolds. The porosity is directly influenced by particle size and particle-size distribution of the raw material. To investigate this impact, a hydroxyapatite granule blend with a wide particle size distribution was fractioned by sieving. The specific fractions and bimodal mixtures of the sieved granule blend were used to 3D print specimens. It has been shown that an optimized arrangement of fractions with large and small particles can provide 3D printed specimens with good mechanical strength due to a higher packing density. An increase of mechanical strength can possibly expand the application area of 3D printed hydroxyapatite scaffolds. View Full-Text
Keywords: 3D printing; scaffold; particle size; porosity; mechanical strength 3D printing; scaffold; particle size; porosity; mechanical strength

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MDPI and ACS Style

Spath, S.; Drescher, P.; Seitz, H. Impact of Particle Size of Ceramic Granule Blends on Mechanical Strength and Porosity of 3D Printed Scaffolds. Materials 2015, 8, 4720-4732.

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