Advances in Filament Structure of 3D Bioprinted Biodegradable Bone Repair Scaffolds

Chengxiong Lin, Yaocheng Wang, Zhengyu Huang, Tingting Wu, Weikang Xu, Wenming Wu, Zhibiao Xu

Article ID: 426
Vol 7, Issue 4, 2021, Article identifier:426

VIEWS - 736 (Abstract) 134 (PDF)

Abstract


Conventional bone repair scaffolds can no longer meet the high standards and requirements of clinical applications in terms of preparation process and service performance. Studies have shown that the diversity of filament structures of implantable scaffolds is closely related to their overall properties (mechanical properties, degradation properties, and biological properties). To better elucidate the characteristics and advantages of different filament structures, this paper retrieves and summarizes the state of the art in the filament structure of the three-dimensional (3D) bioprinted biodegradable bone repair scaffolds, mainly including single-layer structure, double-layer structure, hollow structure, core-shell structure and bionic structures. The eximious performance of the novel scaffolds was discussed from different aspects (material composition, ink configuration, printing parameters, etc.). Besides, the additional functions of the current bone repair scaffold, such as chondrogenesis, angiogenesis, anti-bacteria, and anti-tumor, were also concluded. Finally, the paper prospects the future material selection, structural design, functional development, and performance optimization of bone repair scaffolds.


Keywords


Bone repair scaffolds, Filament structure, 3D printing, Mechanical properties

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DOI: http://dx.doi.org/10.18063/ijb.v7i4.426

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