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Shape-Memory Collagen/Silk-Fibroin Scaffold for Dura Sealing and Skull Base Regeneration
SooJung Chae1, Donghyeok Kim2, Dongyun Kim1
1Department of Precision Medicine, Sungkyunkwan University School of Medicine (SKKU-SOM), Suwon, Republic of Korea.
Small (Weinheim an Der Bergstrasse, Germany)
|April 9, 2026
Summary
A novel injectable scaffold made of collagen/silk-fibroin and calcium phosphate offers dual function for skull base reconstruction. This material seals cerebrospinal fluid (CSF) leaks and promotes tissue regeneration, improving patient outcomes.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Craniofacial Surgery
Background:
- Skull base defects require reconstruction to prevent cerebrospinal fluid (CSF) leakage and meningitis.
- Current reconstruction methods using grafts or synthetic materials often lack biological activity, mechanical integration, and effective sealing.
- There is a need for advanced biomaterials that can provide both sealing and regenerative capabilities for skull base defects.
Purpose of the Study:
- To develop and evaluate a multifunctional, injectable composite scaffold for simultaneous CSF sealing and cranial base tissue regeneration.
- To assess the biological activity, mechanical properties, and sealing capacity of the novel scaffold.
- To investigate the potential of a shape-memory composite for minimally invasive deployment in skull base reconstruction.
Main Methods:
- Fabrication of a layered composite scaffold using collagen/silk-fibroin (S-F) and α-tricalcium phosphate (α-TCP) via a cryogelation-inspired process.
- In vitro assessment of cell adhesion, matrix protein expression, and osteogenic activation.
- In vivo evaluation of scaffold integration and tissue response at the implantation site.
Main Results:
- The developed scaffold features an S-F-rich upper layer for CSF sealing and an α-TCP-containing lower layer for osteointegration.
- The composite exhibits shape-memory behavior, facilitating minimally invasive deployment.
- In vitro studies demonstrated favorable cell interactions and osteogenic potential, while in vivo tests showed stable integration without adverse tissue reactions.
Conclusions:
- The layered, shape-memory composite scaffold effectively addresses the limitations of current materials for skull base reconstruction.
- This dual-functional platform shows promise for simultaneous CSF sealing and promoting osteointegration and tissue regeneration.
- The developed biomaterial represents a significant advancement for treating complex cranial base defects.
