PMID- 22487930 OWN - NLM STAT- MEDLINE DCOM- 20121001 LR - 20211203 IS - 1878-7568 (Electronic) IS - 1742-7061 (Linking) VI - 8 IP - 7 DP - 2012 Jul TI - The effect of pore geometry on the in vitro biological behavior of human periosteum-derived cells seeded on selective laser-melted Ti6Al4V bone scaffolds. PG - 2824-34 LID - 10.1016/j.actbio.2012.04.001 [doi] AB - The specific aim of this study was to gain insight into the influence of scaffold pore size, pore shape and permeability on the in vitro proliferation and differentiation of three-dimensional (3-D) human periosteum-derived cell (hPDC) cultures. Selective laser melting (SLM) was used to produce six distinct designed geometries of Ti6Al4V scaffolds in three different pore shapes (triangular, hexagonal and rectangular) and two different pore sizes (500 mum and 1000 mum). All scaffolds were characterized by means of two-dimensional optical microscopy, 3-D microfocus X-ray computed tomography (micro-CT) image analysis, mechanical compression testing and computational fluid dynamical analysis. The results showed that SLM was capable of producing Ti6Al4V scaffolds with a broad range of morphological and mechanical properties. The in vitro study showed that scaffolds with a lower permeability gave rise to a significantly higher number of cells attached to the scaffolds after seeding. Qualitative analysis by means of live/dead staining and scanning electron micrography showed a circular cell growth pattern which was independent of the pore size and shape. This resulted in pore occlusion which was found to be the highest on scaffolds with 500 mum hexagonal pores. Interestingly, pore size but not pore shape was found to significantly influence the growth of hPDC on the scaffolds, whereas the differentiation of hPDC was dependent on both pore shape and pore size. The results showed that, for SLM-produced Ti6Al4V scaffolds with specific morphological and mechanical properties, a functional graded scaffold will contribute to enhanced cell seeding and at the same time can maintain nutrient transport throughout the whole scaffold during in vitro culturing by avoiding pore occlusion. CI - Copyright (c) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. FAU - Van Bael, S AU - Van Bael S AD - Department of Mechanical Engineering, Division of Production Engineering, Machine Design and Automation, Katholieke Universiteit Leuven, Belgium. simon.vanbael@mech.kuleuven.be FAU - Chai, Y C AU - Chai YC FAU - Truscello, S AU - Truscello S FAU - Moesen, M AU - Moesen M FAU - Kerckhofs, G AU - Kerckhofs G FAU - Van Oosterwyck, H AU - Van Oosterwyck H FAU - Kruth, J-P AU - Kruth JP FAU - Schrooten, J AU - Schrooten J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120407 PL - England TA - Acta Biomater JT - Acta biomaterialia JID - 101233144 RN - 0 (Alloys) RN - 12743-70-3 (titanium alloy (TiAl6V4)) RN - 9007-49-2 (DNA) RN - D1JT611TNE (Titanium) RN - EC 3.1.3.1 (Alkaline Phosphatase) SB - IM MH - Alkaline Phosphatase/metabolism MH - Alloys MH - DNA/metabolism MH - Humans MH - Hydrodynamics MH - *Lasers MH - Materials Testing MH - Periosteum/*cytology/drug effects/ultrastructure MH - Permeability/drug effects MH - Porosity/drug effects MH - Tissue Engineering/*methods MH - Tissue Scaffolds/*chemistry MH - Titanium/*pharmacology MH - X-Ray Microtomography EDAT- 2012/04/11 06:00 MHDA- 2012/10/02 06:00 CRDT- 2012/04/11 06:00 PHST- 2011/12/13 00:00 [received] PHST- 2012/03/28 00:00 [revised] PHST- 2012/04/02 00:00 [accepted] PHST- 2012/04/11 06:00 [entrez] PHST- 2012/04/11 06:00 [pubmed] PHST- 2012/10/02 06:00 [medline] AID - S1742-7061(12)00148-1 [pii] AID - 10.1016/j.actbio.2012.04.001 [doi] PST - ppublish SO - Acta Biomater. 2012 Jul;8(7):2824-34. doi: 10.1016/j.actbio.2012.04.001. Epub 2012 Apr 7.