Silk in Medical and Technical Applications
topic
Medical applications: surgical sutures (silk suture USP standard, multifilament braided, excellent handling, knot security, tensile strength 300-400 MPa, absorbable-class though proteolytic degradation slow 1-2 years, being replaced by synthetic absorbables but still 5-10% of suture market due to superior handling), wound dressings (silk fibroin films, sponges—biocompatible, biodegradable, promoting healing), tissue engineering scaffolds (3D porous structures supporting cell growth for cartilage, bone, skin regeneration), drug delivery systems (silk micro/nanoparticles for controlled release), and medical textiles (antimicrobial silk fabrics for surgical gowns, bandages). Technical: parachutes (historical—WWII, high strength-to-weight, replaced by nylon), aerospace insulation, filtration media, and optical fiber applications.
Role
Silk's biocompatibility, biodegradability, mechanical properties, and processability into diverse forms (fibers, films, sponges, hydrogels, particles) position it as biomaterial of choice for regenerative medicine and drug delivery, with FDA-approved silk-based medical devices emerging (Sofregen—silk hernia repair, Allergan—silk breast implants) representing high-value applications ($10,000-100,000/kg processed biomaterial).