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A Novel Tenorrhaphy Suture Technique with Tissue Engineered Collagen Graft to Repair Large Tendon Defects
Published on: December 10, 2021
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Engineering of a Functional Tendon Using Collagen As a Natural Polymer
Prasad Sawadkar1, Paul Sibbons2, Tarek Ahmed3
1Division of Surgery and interventional Science, University College London Stanmore Campus, London HA7 4LP, United Kingdom.
ACS Biomaterials Science & Engineering
|January 18, 2021
Summary
Engineered collagen tendon grafts show promising integration and improved mechanical strength in a lapine model. This novel approach offers a potential alternative to current grafts for tendon rupture repair.
Area of Science:
- Biomaterials Science
- Orthopedic Surgery
- Tissue Engineering
Background:
- Tendon ruptures create gaps requiring grafts for repair, but current grafts (auto-, allo-, synthetic) have limitations.
- Tissue-engineered grafts from compressed type I collagen were developed but initially lacked suitable biomechanical properties for full load-bearing.
- A modified suture technique was developed to reduce load on engineered grafts, aiding in vivo integration.
Purpose of the Study:
- To evaluate the in vivo integration and efficacy of engineered collagen grafts using a novel load-bearing suture technique.
- To assess the mechanical, structural, and histological properties of these grafts over time in a lapine model.
- To compare the advantages of this engineered collagen graft over existing tendon graft options.
Main Methods:
- Engineered collagen grafts were implanted in a lapine model using a novel suture technique that partially loads the graft in vivo.
- Grafts were tested in three groups for up to 12 weeks without immobilization.
- Gross observation, mechanical testing, structural analysis, and histological examination were performed at 1, 3, and 12 weeks.
Main Results:
- The engineered collagen grafts demonstrated successful integration without adhesions at 3 and 12 weeks.
- Significant improvements in mechanical, structural, and histological properties were observed from 1 week to 12 weeks.
- The novel suture technique facilitated graft integration and enhanced mechanical strength within the tested timeframe.
Conclusions:
- Tissue-engineered collagen grafts, when used with a novel load-bearing suture technique, show excellent in vivo integration and improved biomechanical properties.
- This approach overcomes the limitations of current tendon grafts, offering a promising solution for tendon rupture reconstruction.
- The engineered collagen graft exhibits inherent advantages for tendon repair, including reduced adhesion formation and enhanced strength over time.
