Porous biodegradable metals for hard tissue scaffolds: a review

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Orthopedic Surgery

Background:

• Scaffolds are crucial for tissue regeneration, requiring a balance of mechanical support and mass transport.
• Biodegradable polymers are common but often lack sufficient mechanical strength for hard tissues.
• Biodegradable metals present a promising alternative for hard tissue scaffolding due to their mechanical properties.

Purpose of the Study:

• To explore the potential of biodegradable metals as advanced materials for hard tissue scaffolding.
• To highlight the advantages of biodegradable metals over traditional polymer scaffolds.
• To discuss fabrication techniques and design considerations for metal scaffolds.

Main Methods:

• Review of existing literature on biodegradable metals and scaffold fabrication.
• Analysis of mechanical properties and degradation behavior of metal scaffolds.
• Discussion of computation-aided solid free-form fabrication techniques.

Main Results:

• Biodegradable metal scaffolds exhibit mechanical properties comparable to human bone.
• Tailored degradation behavior can be achieved for metal scaffolds.
• Advanced fabrication methods are suitable for creating complex metal scaffold architectures.

Conclusions:

• Porous biodegradable metals are highly promising for hard tissue scaffold applications.
• Optimizing scaffold design through porosity and material properties is key.
• Biodegradable metals offer a viable solution for challenging orthopedic regeneration needs.