Fibrous Biomaterial Scaffold for Tympanic Membrane Repair: Microarchitectural Engineering and Structure Function...

Area of Science:

• Biomaterials Engineering
• Regenerative Medicine
• Otolaryngology

Background:

• Tympanic membrane (TM) perforations are common and can cause hearing loss if tissue regeneration is inadequate.
• Autologous grafts, the current standard, have limitations including harvesting needs and suboptimal structural replication.
• Native TM structure is complex, and current grafts often fail to restore optimal sound transmission.

Purpose of the Study:

• To review contemporary fabrication methods for fiber-based scaffolds for TM repair.
• To discuss evaluation procedures for these scaffolds and their impact on performance.
• To explore the potential of fiber-based scaffolds as alternatives to autologous grafts.

Main Methods:

• Review of electrospinning, additive manufacturing, melt electrowriting, and hybrid fabrication strategies.
• Discussion of mechanical testing, microstructural imaging, and in vitro biocompatibility assays for scaffold evaluation.
• Analysis of how scaffold microarchitecture influences mechanical behavior and cellular interactions.

Main Results:

• Fiber-based scaffolds allow precise control over fiber orientation, porosity, and microarchitecture.
• Biocompatible polymers like silk fibroin and PLA can be tailored for specific mechanical and degradation properties.
• Evaluation methods confirm the potential of scaffolds to mimic native TM structure and function.

Conclusions:

• Fiber-based scaffolds present a tunable and promising alternative for TM reconstruction.
• Advanced fabrication and evaluation techniques are crucial for developing effective TM repair constructs.
• These engineered scaffolds may facilitate the clinical translation of improved TM repair strategies.