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Three-dimensional-printed polycaprolactone scaffolds with interconnected hollow-pipe structures for enhanced bone
Jiahua Duan1, Dong Lei2, Chen Ling1
1Department of Orthopaedic Surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China.
Regenerative Biomaterials
|June 20, 2022
Summary
New 3D-printed scaffolds with hollow-pipe structures improve bone regeneration by mimicking natural blood vessels. These structures enhance cell growth and vascularization for critical-sized bone defect repair.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Conventional 3D-printed scaffolds for bone regeneration have limited oxygen and nutrient delivery due to simple porous structures.
- This limitation hinders cell viability and osteogenesis, leading to insufficient repair of critical-sized bone defects.
Purpose of the Study:
- To develop and evaluate novel polycaprolactone scaffolds with interconnected hollow-pipe structures (HPS) that mimic micro-vascular networks.
- To assess the efficacy of HPS scaffolds in promoting cell activities and bone regeneration in vitro and in vivo.
Main Methods:
- Indirect one-pot 3D-printing method to fabricate polycaprolactone scaffolds with hollow-pipe structures.
- In vitro studies to evaluate cell attachment, proliferation, osteogenesis, and angiogenesis on HPS scaffolds.
- In vivo studies using rabbit critical-sized bone defects to assess bone regeneration and vascularization.
Main Results:
- HPS scaffolds demonstrated enhanced cell attachment, proliferation, osteogenesis, and angiogenesis compared to non-hollow scaffolds in vitro.
- In vivo studies showed significantly improved bone regeneration and vascularization in rabbit defects treated with HPS scaffolds at 8 and 12 weeks.
Conclusions:
- The fabricated HPS scaffolds effectively mimic natural micro-vascular networks, facilitating nutrient and oxygen transport.
- HPS scaffolds show significant potential for enhancing bone regeneration and vascularization in critical-sized bone defects.
