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In vitro study of CaTiO3-hydroxyapatite composites for bone tissue engineering
Nguyen Thuy Ba Linh1, Dibakar Mondal, Byong Taek Lee
1From the *Department of Regenerative Medicine and †Institute of Tissue Regeneration, College of Medicine, Soonchunhyang University, Cheonan, Republic of Korea.
ASAIO Journal (American Society for Artificial Internal Organs : 1992)
|September 20, 2014
Summary
The 70% hydroxyapatite (HAp) biocomposite with CaTiO3 shows excellent phase stability and mechanical strength. This CaTiO3/HAp material demonstrates superior biocompatibility and cell viability, making it ideal for bone tissue engineering applications.
Area of Science:
- Biomaterials Science
- Materials Engineering
- Biotechnology
Background:
- Hydroxyapatite (HAp) and CaTiO3 are key materials in bone tissue engineering.
- Optimizing biocomposite formulations is crucial for enhancing bone regeneration.
- Understanding phase stability and mechanical properties is essential for clinical translation.
Purpose of the Study:
- To fabricate and characterize a novel biocomposite of CaTiO3 and HAp.
- To evaluate the phase stability, mechanical strength, and biocompatibility of varying HAp concentrations.
- To identify the optimal HAp concentration for bone tissue engineering.
Main Methods:
- Fabrication of CaTiO3/HAp biocomposites with 0%, 50%, 70%, and 100% HAp via microwave sintering.
- Phase stability analysis using X-ray diffraction.
- Mechanical property assessment including Vickers hardness, Young's modulus, fracture toughness, brittleness, and compressive strength.
- In vitro biocompatibility evaluation using MC3T3-E1 cells, MTT assay, immunofluorescence, and Western blotting.
Main Results:
- CaTiO3/HAp composites exhibited good phase stability.
- The 70HAp composition showed the highest cell viability at 1, 3, and 7 days.
- Strong expression of Collagen Type I and osteopontin was observed on 70HAp and 100HAp.
- Osteocalcin expression was specific to 70HAp at day 7, and alkaline phosphatase and osteopontin showed the strongest fluorescent signal on 70HAp.
Conclusions:
- The 70HAp biocomposite demonstrates excellent biocompatibility and osteogenic potential.
- Optimal HAp concentration is critical for achieving desired biological responses.
- The 70HAp/CaTiO3 biocomposite is a promising candidate for bone tissue engineering applications.
