화학공학소재연구정보센터
학회 한국재료학회
학술대회 2019년 봄 (05/15 ~ 05/17, 평창 알펜시아 리조트)
권호 25권 1호
발표분야 특별심포지엄3. 생체재료의 최근 기술 동향-오거나이저:한철민(전주대)/이은정(단국대)
제목 Biomimetic porous Mg with tunable mechanical properties and biodegradation rates for bone regeneration
초록 The medical applications of porous Mg scaffolds are limited owing to its rapid corrosion, which dramatically decreases the mechanical strength of the scaffold. Mimicking the bone structure and composition can improve the mechanical and biological properties of porous Mg scaffolds. The Mg structure can also be coated with HA by an aqueous precipitation coating method to enhance both the corrosion resistance and the biocompatibility. However, due to the brittleness of HA coating layer, cracks tend to form in the HA coating layer, which may influence the corrosion and biological functionality of the scaffold. Consequently, in this study, hybrid poly(ether imide) (PEI)–SiO2 layers were applied to the HA-coated biomimetic porous Mg to impart the structure with the high corrosion resistance associated with PEI and excellent bioactivity with SiO2. The porosity of the Mg was controlled by adjusting the concentration of the sodium chloride (NaCl) particles used in the fabrication via the space-holder method. The mechanical measurements showed that the compressive strength and stiffness of the biomimetic porous Mg increased as the portion of the dense region increased. In addition, following results show that HA/(PEI–SiO2) hybrid-coated biomimetic Mg is a promising biodegradable scaffold for orthopedic applications. In-vitro testing revealed that the proposed hybrid coating reduced the degradation rate and facilitated osteoblast spreading compared to HA- and HA/PEI-coating scaffolds. Moreover, in-vivo testing with a rabbit femoropatellar groove model showed improved tissue formation, reduced corrosion and degradation, and improved bone formation on the scaffold.
저자 Minho Kang
소속 Department of Chemical and Biological Engineering
키워드 Magnesium; biomimetic; porous scaffold; organic–inorganic hybrid coating; hard tissue engineering
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