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Adhesive Hydrogels for Maxillofacial Tissue Regeneration Using Minimally Invasive Procedures
Christoph Salzlechner1, Tabasom Haghighi1, Isabella Huebscher1
1Centre for Craniofacial and Regenerative Biology, King's College London, London, SE1 9RT, UK.
Advanced Healthcare Materials
|January 17, 2020
Summary
New hyaluronic acid hydrogels enable minimally invasive repair of maxillofacial tissues. These injectable materials deliver cells and drugs, promoting bone, cartilage, and muscle regeneration in complex facial structures.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Oral and Maxillofacial Surgery
Background:
- Maxillofacial tissue repair is challenging due to complex anatomy and limited surgical access.
- Current minimally invasive techniques lack methods for delivering regenerative agents directly into maxillofacial tissues.
- Existing treatments do not support cell integration or delivery of regenerative factors for bone, cartilage, or muscle regeneration in the maxillofacial region.
Purpose of the Study:
- To develop injectable hyaluronic acid (HA)-based hydrogels for minimally invasive maxillofacial tissue repair.
- To create hydrogels capable of adhering to tissue and delivering cells or drugs.
- To investigate the potential of modified HA hydrogels for fostering maxillofacial tissue regeneration.
Main Methods:
- Synthesis of methacrylate (MA) and 3,4-dihydroxyphenylalanine (Dopa) modified hyaluronic acid (MA-HA-Dopa) via an aqueous route.
- Evaluation of hydrogel properties including aqueous applicability, rapid in-situ gelation under surgical light, and tissue adhesion.
- Assessment of human marrow stromal cell attachment, survival, and interaction within the hydrogels upon Dopa oxidation.
Main Results:
- MA-HA-Dopa hydrogels were successfully synthesized and demonstrated suitability for aqueous application.
- The hydrogels exhibited rapid gelation under standard surgical light and strong adhesion to surrounding tissues.
- Oxidation of Dopa moieties facilitated robust attachment and survival of encapsulated human marrow stromal cells within the hydrogels.
- Dopa incorporation promoted essential cell-tissue interactions for regenerative applications.
Conclusions:
- MA-HA-Dopa hydrogels offer a promising platform for minimally invasive maxillofacial regenerative procedures.
- The developed hydrogels support cell engraftment and can be precisely delivered to target sites.
- These findings suggest a novel approach for enhancing bone, cartilage, and muscle repair in the maxillofacial region using injectable, cell-interactive biomaterials.
