Metallic topological structures in bone repair implants: Design, properties, and biological interactions

Area of Science:

• Biomaterials Engineering
• Orthopedic Surgery
• Tissue Engineering

Background:

• Traditional metallic implants face challenges like stress shielding and poor osseointegration.
• Metallic topological structures integrate mechanical adaptability with biological functionality for bone repair.

Purpose of the Study:

• To systematically review the design, properties, and biological interactions of metallic topological implants.
• To explore advanced manufacturing strategies and future directions for personalized orthopedic implants.

Main Methods:

• Comparison of conventional metallic materials and their limitations.
• Overview of manufacturing strategies: structural/surface modification, unit cell architectures, topology optimization, and bio-inspired designs.
• Analysis of biological interactions: mechanotransduction, osteogenic differentiation, angiogenesis, and immune modulation.

Main Results:

• Metallic topological structures demonstrate potential for enhanced mechanical adaptability and biological performance.
• Integration of machine learning and 4D printing offers personalized implant design possibilities.
• Topological cues effectively regulate cellular responses and modulate biological processes relevant to bone healing.

Conclusions:

• Metallic topological structures represent a promising new generation of orthopedic implants.
• Advanced manufacturing and emerging technologies can lead to highly personalized bone repair solutions.
• This approach addresses current clinical limitations, potentially improving patient outcomes in orthopedic applications.