Biomaterials for bone tissue engineering: achievements to date and future directions

Area of Science:

• Orthopedic Medicine
• Biomaterials Science
• Regenerative Medicine

Background:

• Modern lifestyles contribute to increased bone fractures, bone loss, and critical-sized bone defects.
• Natural bone grafts (autografts, allografts, xenografts) have limitations including donor site morbidity, infection risk, and delayed healing.
• Synthetic bone grafts utilizing bone tissue engineering (BTE) offer a promising alternative for bone repair.

Purpose of the Study:

• To review critical insights into various biomaterials for revolutionary improvements in orthopedic medicine.
• To detail the anatomy of human bone, bone defects, diseases, and limitations of natural and synthetic bone scaffolds.
• To discuss biopolymers, bioceramics, and biometals-based biomaterials for bone regeneration.

Main Methods:

• Review of current literature on biomaterials for bone tissue engineering.
• Analysis of natural bone graft limitations and the advantages of synthetic bone graft materials.
• In-depth discussion of various biomaterial categories including polymers, ceramics, composites, natural biomaterials, and hybrid materials.

Main Results:

• Bone tissue engineering employs diverse materials like biodegradable polymers (PLA, PGA, PCL), PEG-hydrogels, ceramics (HA, β-TCP), composites, and natural biomaterials (collagen, chitosan).
• These materials support and enhance bone regeneration by mimicking natural bone structure and promoting cell activity.
• Functionalized scaffolds and hybrid materials offer advanced strategies for improved bone healing and integration.

Conclusions:

• Synthetic bone grafts and advanced biomaterials are poised to revolutionize orthopedic medical fields.
• Understanding bone anatomy, defects, and material properties is crucial for developing effective bone regeneration strategies.
• Current trends and future prospects highlight the potential of innovative bone transplant materials and techniques.