Biomimetic hybrid scaffolds for engineering human tooth-ligament interfaces

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Craniofacial Engineering

Background:

• Reconstructing large oral and craniofacial defects involving bone and ligament is clinically challenging.
• Current oral regenerative medicine approaches lack predictability for repairing tooth-supporting tissues lost due to trauma, infection, or surgery.

Purpose of the Study:

• To design and fabricate composite hybrid polymeric scaffolds for in vivo regeneration of human tooth dentin-ligament-bone complexes.
• To utilize genetically modified human cells for targeted transplantation within these scaffolds.

Main Methods:

• Multi-scale computational design and fabrication of composite hybrid polymeric scaffolds using polycaprolactone (PCL) and poly(glycolic acid) (PGA).
• Targeted cell transplantation of genetically modified human cells into the designed scaffolds.
• In vivo assessment of tissue formation and interfacial integration.

Main Results:

• Successful formation of human tooth dentin-ligament-bone complexes in vivo.
• Demonstrated interfacial generation of parallel- and obliquely-oriented fibers within the PCL-PGA scaffolds.
• Formation of cementum-like tissue, ligament, and bone structures mimicking natural periodontal tissues.

Conclusions:

• The developed composite scaffolds facilitate the regeneration of multi-tissue interfaces essential for oral and craniofacial applications.
• This approach holds potential for creating customized periodontal scaffolds for clinical use.
• Offers a promising strategy for addressing limitations in current oral regenerative medicine.