High Strength Titanium with Fibrous Grain for Advanced Bone Regeneration

Area of Science:

• Biomaterials Science
• Orthopedic Engineering
• Regenerative Medicine

Background:

• Pure titanium's bioinertness limits clinical applications due to poor strength and bone healing.
• Load-bearing implants require materials with enhanced mechanical properties and osteogenic potential.

Purpose of the Study:

• To develop a novel titanium biomaterial with improved mechanical strength and bone regenerative capabilities.
• To create a bone-mimicking fibrous-grained (FG) titanium structure for enhanced implant performance.

Main Methods:

• Constructed a new titanium (Ti) with a highly aligned fibrous-grained (FG) microstructure.
• Modeled the structure on collagen fibrils and hydroxyapatite nanocrystal planes in natural bone.

Main Results:

• FG Ti exhibited high strength (≈950 MPa) and excellent affinity for new bone growth.
• The FG microstructure promoted close osteoblast contact and enhanced osteogenic gene expression.
• The Ti(0002) crystal plane facilitated hydrophilic anatase titanium oxide layer formation, accelerating biomineralization.

Conclusions:

• Bioinspired FG Ti demonstrates significant improvements in mechanical properties and bone regeneration.
• The FG microstructure and crystal plane orientation offer a new strategy for designing advanced metallic biomaterials.
• This approach enhances bone-implant contact and accelerates osseointegration for clinical applications.