Three-Dimensionally Printed Bionic Hydroxyapatite (HAp) Ceramic Scaffolds with Different Structures and Porosities:...

Area of Science:

• Biomaterials Science
• Biomedical Engineering
• Materials Science

Background:

• Bioceramic scaffolds are crucial for bone repair implants, requiring optimal properties.
• Natural bone microstructure inspires the design of advanced bionic scaffolds.
• Hydroxyapatite (HAp) is a key material for bone regeneration applications.

Purpose of the Study:

• To design and 3D-print HAp scaffolds with varying structures (BCC, FCC, TPMS) and porosities (40-80 vol.%).
• To investigate the impact of structure and porosity on scaffold morphology, mechanical strength, and biocompatibility.
• To identify optimal HAp scaffold designs for enhanced bone repair applications.

Main Methods:

• Utilized 3D printing to fabricate HAp ceramic scaffolds with controlled structures and porosities.
• Characterized scaffold morphology, mechanical properties (compressive strength), and in vitro biocompatibility.
• Compared the performance of different structural designs (BCC, FCC, TPMS) and porosity levels.

Main Results:

• HAp scaffolds with Triply Periodic Minimal Surfaces (TPMS) structures and 80 vol.% porosity exhibited the best compressive strength.
• The 80 vol.% TPMS HAp scaffold demonstrated superior in vitro biocompatibility.
• Structure and porosity significantly influenced the overall properties of the HAp scaffolds.

Conclusions:

• The HAp scaffold with an 80 vol.% TPMS structure presents a promising candidate for bone repair engineering.
• This study provides valuable insights for developing advanced bioceramic scaffolds for orthopedic applications.
• Optimized bionic scaffold design is key to achieving excellent implant performance in bone regeneration.