Self-healing hybrid hydrogels with sustained bioactive components release for guided bone regeneration

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Oral Surgery

Background:

• Guided bone regeneration (GBR) is crucial for oral bone defect repair, traditionally using titanium mesh.
• Titanium mesh methods for large defects cause increased trauma and costs.
• A need exists for improved GBR scaffolds with enhanced biocompatibility and efficacy.

Purpose of the Study:

• To fabricate and evaluate a novel bi-layered scaffold for guided bone regeneration.
• To assess the scaffold's ability to create an osteogenic microenvironment and maintain space stability.
• To investigate the impact of crosslinkers and bonding methods on hydrogel properties for GBR.

Main Methods:

• Fabrication of a bi-layered scaffold using electrospinning for the barrier layer and self-healing hydrogel for the repair layer.
• Incorporation of dynamic covalent bonds within the hydrogel for self-healing properties.
• Exploration of different crosslinkers and bonding strategies to optimize hydrogel performance.

Main Results:

• The bi-layered scaffold successfully prevented connective tissue infiltration into bone defects.
• The self-healing hydrogel maintained the stability of the osteogenic space.
• The scaffold demonstrated good biocompatibility, cell barrier function, and enhanced osteoblast proliferation and differentiation, promoting bone regeneration.

Conclusions:

• The developed bi-layered scaffold is a promising strategy for guided bone regeneration in oral applications.
• This innovative scaffold overcomes limitations associated with traditional titanium mesh GBR.
• The self-healing hydrogel component offers enhanced stability and bioactive substance release for improved bone healing.