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Customizable design ofmultiple-biomolecule delivery platform for enhanced osteogenic responses via‘tailored assembly system’

引用

Bio-Design and Manufacturing 2022年第3期5卷 451-464页

作者： Hyun Lee Min-Kyu Lee Ginam Han Hyoun-Ee Kim Juha Song yuhyeon na Chang-Bun Yoon SeKwon Oh Tae-Sik Jang Hyun-Do Jung Department of Biomedical-Chemical Engineering Catholic University of KoreaBucheon 14662Republic of Korea Department of Biotechnology The Catholic University of KoreaBucheon 14662Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Querrey Simpson Institute for Bioelectronics Northwestern UniversityEvanstonIL 60208USA Biomedical Implant Convergence Research Center Advanced Institutes of Convergence TechnologySuwon 443-270Republic of Korea School of Chemical and Biomedical Engineering Nanyang Technological University70 Nanyang DriveSingapore 637457Singapore Department of Advanced Materials Engineering Korea Polytechnic UniversitySiheung-siGyeonggi-do 15073Republic of Korea Surface R&D Group Korea Institute of Industrial TechnologyIncheon 21999Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangju 61452Republic of Korea

Porous titanium(Ti)scaffolds have been extensively utilized as bone substitute scaffolds due to their superior biocompatibility and excellent mechanical properties.However,naturally formed TiO2 on the surface limits fast osseointegration.Different biomolecules have been widely utilized to overcome this issue;however,homogeneous porous Ti scaffolds could not simultaneously deliver multiple biomolecules that have different release behaviors.In this study,functionally graded porous Ti scaffolds(FGPTs)with dense inner and porous outer parts were fabricated using a two-body combination and densification procedure.FGPTs with growth factor(BMP-2)and antibiotics(TCH)exhibited suitable mechanical properties as bone substituting material and presented good structural stability.The release of BMP-2 was considerably prolonged,whereas the release of TCH was comparable to that of homogenous porous titanium scaffolds(control group).The osteogenic differentiation obtained using FGPTs was maintained due to the prolonged release of BMP-2.The antimicrobial properties of these scaffolds were verified using S.aureus in terms of prior release time.In addition,various candidates for graded porous Ti scaffolds with altered pore characteristics were presented.

关键词： Functionally graded porous titanium scaffold Tailored assembly system Mechanical tunability Multiplebiomolecule delivery Bone tissue engineering

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