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Updated: Jun 17, 2026
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The Arteriovenous (AV) Loop in a Small Animal Model to Study Angiogenesis and Vascularized Tissue Engineering
Published on: November 2, 2016
Modified approach to construct a vascularized coral bone in rabbit using an arteriovenous loop.
Qing-shan Dong1, Cheng Lin, Hong-tao Shang
1Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, China.
Journal of Reconstructive Microsurgery
|December 17, 2009
Summary
This study created a vascularized coral bone graft using a modified arteriovenous loop (AVL) in rabbits. The AVL model successfully promoted vascularization within the coral scaffold, proving effective for tissue engineering.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Vascular Biology
Background:
- Vascularization is critical for the survival of thick, three-dimensional engineered tissues.
- Developing methods for prefabricating vascularized tissue constructs is essential for clinical applications.
Purpose of the Study:
- To develop and evaluate a modified arteriovenous loop (AVL) model for prefabricating an axially vascularized tissue-engineered coral bone.
- To assess the efficacy of the AVL as a vascular carrier within a coral scaffold.
Main Methods:
- An arteriovenous fistula was created between rabbit femoral artery and vein to form an AVL.
- The AVL was embedded within a coral block and implanted subcutaneously.
- Control group received coral implantation without an AVL.
- Vascularization was assessed using histology, vascular casting, and scanning electron microscopy at various time points.
Main Results:
- The AVL model demonstrated successful vascularization, with new blood vessels extending throughout the coral blocks.
- Vascular density was significantly higher in the AVL group compared to the control.
- Histological and SEM analyses confirmed robust neovascularization and sprouting from the AVL.
Conclusions:
- The modified AVL model is an effective method for creating axially vascularized coral bone.
- This approach holds promise for advancing tissue engineering of complex bone constructs.
