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<p>In bone tissue engineering microstructure design, adjusting the structural design of biomimetic bone scaffolds can provide distinct differentiation stimuli to cells on the scaffold surface. This study explored the biomechanical impacts of different biomimetic microstructures on advanced bone tissue engineering scaffolds. Two irregular bone scaffolds (homogeneous/radial gradient) based on the Voronoi tesselation algorithm and eight regular lattice scaffolds involving pillar body centered cubic, vintiles, diamond, and cube (homogeneous/radial gradient) with constant 80% porosity were constructed. Mechanical stimulation differentiation algorithms, finite element analysis, and computational fluid dynamics were used to investigate the effects of different pore structures on the octahedral shear strain and fluid flow shear stress within the scaffolds, thereby elucidating the differentiation capabilities of the five structural bone/cartilage cell types. The findings demonstrated that irregular structures and radial-gradient designs promoted osteogenic differentiation, whereas regular structures and homogeneous designs facilitated chondrogenic differentiation. The highest percentages of osteoblast and chondrocyte differentiation were observed in radial-gradient irregular scaffolds. This research provides insights into the microstructure design of bone tissue engineering implants.</p>

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Comparative Study on Tissue Differentiation of Bone Marrow Mesenchymal Stem Cells in Irregular Versus Regular Bone Tissue Engineering Scaffolds

  • 期刊论文

  • 发表日期：

    2025年4月30日

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  • Jizhe Hai,
  • Qingyu Xu,
  • Chunlong Shan,
  • Haijie Li,
  • Zhiguo Xu,
  • Lei Jing

摘要

In bone tissue engineering microstructure design, adjusting the structural design of biomimetic bone scaffolds can provide distinct differentiation stimuli to cells on the scaffold surface. This study explored the biomechanical impacts of different biomimetic microstructures on advanced bone tissue engineering scaffolds. Two irregular bone scaffolds (homogeneous/radial gradient) based on the Voronoi tesselation algorithm and eight regular lattice scaffolds involving pillar body centered cubic, vintiles, diamond, and cube (homogeneous/radial gradient) with constant 80% porosity were constructed. Mechanical stimulation differentiation algorithms, finite element analysis, and computational fluid dynamics were used to investigate the effects of different pore structures on the octahedral shear strain and fluid flow shear stress within the scaffolds, thereby elucidating the differentiation capabilities of the five structural bone/cartilage cell types. The findings demonstrated that irregular structures and radial-gradient designs promoted osteogenic differentiation, whereas regular structures and homogeneous designs facilitated chondrogenic differentiation. The highest percentages of osteoblast and chondrocyte differentiation were observed in radial-gradient irregular scaffolds. This research provides insights into the microstructure design of bone tissue engineering implants.