Preparation and characterization of bionic bone structure chitosan/hydroxyapatite scaffold for bone tissue...

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Materials Chemistry

Background:

• Chitosan (CS) and hydroxyapatite (HA) are promising materials for bone tissue engineering.
• Developing 3D scaffolds with oriented structures is crucial for mimicking natural bone.
• Existing scaffolds often lack optimal biocompatibility and mechanical properties.

Purpose of the Study:

• To prepare and characterize 3D oriented chitosan/hydroxyapatite (CS/HA) composite scaffolds.
• To evaluate the in vitro biocompatibility and mechanical properties of these novel scaffolds.
• To assess their potential for bone tissue engineering applications.

Main Methods:

• In situ precipitation method used for scaffold fabrication.
• Scanning electron microscopy (SEM) for structural analysis.
• X-ray powder diffractometry and Fourier transform infrared spectroscopy for material characterization.
• In vitro cell culture with osteoblasts (MC3T3-E1) to assess biocompatibility.

Main Results:

• SEM revealed a spoke-like, multilayered, porous structure with acicular nano-HA.
• Osteoblasts exhibited good adhesion, spreading, and proliferation on the composite scaffolds.
• Material analysis confirmed the presence of hydroxyapatite with a bone-like phase structure.
• CS/HA scaffolds demonstrated significantly enhanced cell proliferation, adhesion, and alkaline phosphatase activity compared to pure CS scaffolds.
• Compressive strength of CS/HA15 scaffolds increased by 33.07% over pure CS scaffolds.

Conclusions:

• The fabricated 3D oriented CS/HA scaffolds possess excellent biocompatibility and mechanical properties.
• These scaffolds support osteoblast function and proliferation, suggesting suitability for bone regeneration.
• The developed CS/HA composite scaffolds show significant potential for applications in bone tissue engineering.