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Surface-Modified Hydroxyapatite Nanoparticle-Reinforced Polylactides for Three-Dimensional Printed Bone Tissue Engineering Scaffolds

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Bone defects represent a clinical challenge that severely impacts the quality of life of affected patients. To match the shape of a bone defect area exactly, additive manufacturing has emerged as a promising technology to produce customized bone regeneration scaffolds for bone defect treatment. In this study, new three-dimensional (3D)-printed poly(L-lactic acid) (PLLA)/hydroxyapatite (HA) composite scaffolds were developed. HA nanoparticles were first modified by a straightforward, economical method. Briefly, HA nanoparticles were modified with dopamine and hexamethylenediamine, and PLLA chains were grafted onto the HA nanoparticles by aminolysis reaction. Then, the PLLA-modified HA nanoparticles were blended with PLLA to form a thermoplastic composite for 3D printing. Due to the high compatibility between the PLLA matrix and PLLA-modified HA nanoparticles, the 3D-printed PLLA/HA scaffolds possess robust mechanical properties and good biocompatibility. This study provides a flexible strategy to fabricate scaffolds for the customized treatment of bone defects.
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Keywords: ADDITIVE MANUFACTURING; BONE REGENERATION; CUSTOMIZED TREATMENT; NANOCOMPOSITE; SURFACE MODIFICATION

Document Type: Research Article

Publication date: February 1, 2018

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  • Journal of Biomedical Nanotechnology (JBN) is a peer-reviewed multidisciplinary journal providing broad coverage in all research areas focused on the applications of nanotechnology in medicine, drug delivery systems, infectious disease, biomedical sciences, biotechnology, and all other related fields of life sciences.
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