Transforming Natural Eggshell and Diatomite into Bioactive Calcium Silicate Material for Bone Regeneration

Area of Science:

• Biomaterials Science
• Materials Chemistry
• Bioceramics

Background:

• Calcium silicate (CS) is a vital bioceramic bone graft material.
• Utilizing waste materials like eggshells for CS synthesis offers environmental benefits.
• Eggshells provide a porous structure rich in calcium ions, ideal for bone graft applications.

Purpose of the Study:

• To synthesize novel zinc oxide-calcium silicate (ZnO-CS) bioceramic materials.
• To evaluate the antibacterial properties and biocompatibility of the synthesized ZnO-CS.
• To explore the potential of ZnO-CS for bone tissue engineering applications.

Main Methods:

• High-temperature calcination method used for CS material preparation.
• X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) for composition analysis.
• Scanning electron microscopy (SEM) for structural analysis.
• In vitro antibacterial, mineralization, and cytotoxicity assays were performed.

Main Results:

• Characterization confirmed the porous structure of the synthesized CS material.
• ZnO-CS exhibited significant antibacterial effects against pathogens in vitro.
• ZnO-CS promoted hydroxyapatite layer formation, indicating osteoconductivity.
• In vitro cytotoxicity tests showed good biosafety and enhanced cell proliferation.

Conclusions:

• The novel ZnO-CS material demonstrates potent antibacterial activity and excellent biocompatibility.
• ZnO-CS effectively promotes mineralization and cell proliferation, crucial for bone regeneration.
• This eco-friendly ZnO-CS derived from eggshells is a highly promising candidate for bone tissue engineering.