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[Study on preparation of 3D printing degradable tissue engineering ossicles].
1First Affiliated Hospital of Anhui Medical University, Hefei 230021, China; the Sixth Medical Center of PLA General Hospital, Beijing 100048, China.
Summary
Researchers developed a novel 3D-printed scaffold using polylactic acid-glycolic acid copolymer and beta-tricalcium phosphate for hearing reconstruction. This degradable ossicle scaffold shows promising porosity and mechanical strength for implantation.
Area of Science:
- Biomaterials Engineering
- Tissue Engineering
- Regenerative Medicine
Background:
- Middle ear hearing reconstruction often requires ossicular replacement.
- Traditional prosthetics have limitations, driving the need for advanced tissue engineering solutions.
Purpose of the Study:
- To develop and characterize a 3D-printed, degradable scaffold for tissue engineering of ossicles.
- To evaluate the scaffold's suitability for middle ear hearing reconstruction.
Main Methods:
- Utilized a low-temperature deposition 3D printing method with polylactic acid-glycolic acid copolymer (PLGA) and beta-tricalcium phosphate (β-TCP).
- Scaffolds were characterized for apparent morphology, internal structure, pore size, porosity, and mechanical properties.
- Assessed the loading capacity for osteoinductive factors (BMP-2).
Main Results:
- Successfully fabricated cylindrical, porous scaffolds (1.5mm x 6.0mm) with interconnected pores (100-400 μm).
- Achieved high porosity (83.43±0.01%) with β-TCP particles integrated onto the PLGA surface.
- Demonstrated moderate mechanical strength suitable for ossicular implantation and loaded BMP-2 (0.7 μg/mm³).
Conclusions:
- Low-temperature deposition printing enables the creation of polymer-degradable ceramic ossicle scaffolds.
- The developed scaffold possesses appropriate porosity and mechanical properties for implantation.
- The scaffold is capable of being loaded with osteoinductive factors, supporting bone regeneration.
