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Tissue Engineering by Intrinsic Vascularization in an In Vivo Tissue Engineering Chamber
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A mosaic structure multi-level vascular network design for skull tissue engineering.

Jian Qi1, Jia Li1, Shuxian Zheng1

  • 1Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin, 300354, China.

Computers in Biology and Medicine
|November 17, 2018
PubMed
Summary

A novel mosaic vascular structure design mimics the diploic vein for skull tissue engineering, promoting cell growth and osteogenesis by optimizing blood flow and vessel mechanics.

Keywords:
Diploic veinHard tissuesMicro-CTMosaic structureNetwork topologyTissue engineering

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Biomedical Engineering

Background:

  • Vascularization is crucial for cell growth and osteogenesis in human skull tissue engineering scaffolds.
  • Current scaffolds lack integrated vascular structures, limiting their efficacy.

Purpose of the Study:

  • To propose a parameterized design method for mosaic vascular structures in skull tissue engineering.
  • To mimic the natural diploic vein morphology and vascular network.

Main Methods:

  • Utilized micro-CT scans of skull samples to extract diploic vein features.
  • Developed a multi-level vascular network model using a power diagram.
  • Performed finite element analysis (FEA) for fluid-solid coupling to simulate blood flow effects.
  • Fabricated PDMS mosaic structures and conducted in vitro cell culture with HUVECs.

Main Results:

  • FEA confirmed reasonable vessel deformation and stress distribution under simulated blood flow.
  • Designed vascular structures met cell growth requirements for blood pressure, velocity, and shear stress.
  • In vitro studies showed high HUVEC survival and attachment to the PDMS mosaic structure after 48 hours.

Conclusions:

  • The proposed mosaic structure vascular design method successfully replicates native diploic vein morphology.
  • This approach offers a flexible and adaptable strategy for vascular network design in hard tissue engineering.
  • The method is suitable for experimental studies and advancing skull tissue regeneration.