Fabrication of Trabecular Bone-Templated Tissue-Engineered Constructs by 3D Inkjet Printing.

Vanderburgh JP, Fernando SJ, Merkel AR, Sterling JA, Guelcher SA
Adv Healthc Mater. 2017 6 (22)

PMID: 28892261 · PMCID: PMC5815519 · DOI:10.1002/adhm.201700369

3D printing enables the creation of scaffolds with precisely controlled morphometric properties for multiple tissue types, including musculoskeletal tissues such as cartilage and bone. Computed tomography (CT) imaging has been combined with 3D printing to fabricate anatomically scaled patient-specific scaffolds for bone regeneration. However, anatomically scaled scaffolds typically lack sufficient resolution to recapitulate the <100 micrometer-scale trabecular architecture essential for investigating the cellular response to the morphometric properties of bone. In this study, it is hypothesized that the architecture of trabecular bone regulates osteoblast differentiation and mineralization. To test this hypothesis, human bone-templated 3D constructs are fabricated via a new micro-CT/3D inkjet printing process. It is shown that this process reproducibly fabricates bone-templated constructs that recapitulate the anatomic site-specific morphometric properties of trabecular bone. A significant correlation is observed between the structure model index (a morphometric parameter related to surface curvature) and the degree of mineralization of human mesenchymal stem cells, with more concave surfaces promoting more extensive osteoblast differentiation and mineralization compared to predominately convex surfaces. These findings highlight the significant effects of trabecular architecture on osteoblast function.

© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

MeSH Terms (13)

Biocompatible Materials Bone Regeneration Cancellous Bone Cartilage Cell Differentiation Cells, Cultured Humans Materials Testing Mesenchymal Stem Cells Osteogenesis Printing, Three-Dimensional Tissue Engineering Tissue Scaffolds

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