3D-printed PCL scaffolds with anatomy-inspired bionic stratified structures for the treatment of growth plate injuries

Wang, Xianggang; Li, Zuhao; Liu, Jiaqi; Wang, Chenyu; Bai, Haotian; Zhu, Xiujie; Wang, Hui; Wang, Zhonghan; Liu, He; Wang, Jincheng

doi:10.1016/j.mtbio.2023.100833

Cited by 4 publications

(1 citation statement)

References 57 publications

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“…Many advanced 3D printing techniques, with fast printing speed and high precision have been developed in the past several decades, including fused deposition modeling (FDM) [14][15][16], continuous liquid interface production (CLIP) [17,18], high-area rapid printing (HARP) [19], rapid continuous stereolithography based on volumetric polymerization inhibition patterning [20], dualcolor xolography volumetric 3D printing [21,22], volume 3D printing based on tomographic reconstruction [23][24][25][26], etc. The development of 3D printing technology has provided numerous advantages for manufacturing prototypes of tubular structures such as tubular grafts and biomimetic blood vessels [1,[27][28][29][30]. For example, van Lith et al used CLIP to achieve high-precision tubular graft of 2 cm long printing in less than 20 min [31].…”

Section: Introductionmentioning

confidence: 99%

Polar-coordinate line-projection light-curing continuous 3D printing for tubular structures

Wang,

Liu,

Yin

et al. 2024

Int. J. Extrem. Manuf.

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3D printing techniques offer an effective method in fabricating complex radially multi-material structures. However, it is challenging for complex and delicate radially multi-material model geometries without supporting structures, such as tissue vessels and tubular graft, among others. In this work, we tackle these challenges by developing a polar digital light processing technique which use a rod as the printing platform. The 3D model fabrication is accomplished through line projection. The rotation and translation of the rod are synchronized to project and illuminate the photosensitive material volume. By controlling the distance between the rod and the printing window, we achieved the printing of tubular structures with a minimum wall thickness as thin as 50 micrometers. By controlling the width of fine slits at the printing window, we achieved the printing of structures with a minimum feature size of 10 micrometers. Our process accomplished the fabrication of thin-walled tubular graft structure with a thickness of only 100 micrometers and lengths of several centimeters within a timeframe of just 100 seconds. Additionally, it enables the printing of axial multi-material structures, thereby achieving adjustable mechanical strength. This method is conducive to rapid customization of tubular grafts and the manufacturing of tubular components in fields such as dentistry, aerospace, and more.

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