Fabrication of Mineralized Polymeric Nanofibrous Composites for Bone Graft Materials

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Fabrication of Mineralized Polymeric Nanofibrous Composites for Bone Graft Materials

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Title: Fabrication of Mineralized Polymeric Nanofibrous Composites for Bone Graft Materials
Author: NGIAM, M; LIAO, S; PATIL, AJ; CHENG, ZY; YANG, FY; GUBLER, MJ; RAMAKRISHNA, S; CHAN, CK
Abstract: Poly-L-lactic acid (PLLA) and PLLA/collagen (50% PLLA+50% collagen; PLLA/Col) nanofibers were fabricated using electrospinning. Mineralization of these nanofibers was processed using a modified alternating soaking method. The structural properties and morphologies of mineralized PLLA and PLLA/Col nanofibers were investigated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and contact angle measurements. Human bone-derived osteoblasts were cultured on the materials for up to 1 week to assess the biological properties of the nanofibrous composites. Cell attachment on these nanocomposites was also tested within 1 h of culture at room temperature. The mechanical properties of the cell-nanocomposite constructs were determined using tensile testing. From our results, the bone-like nano-hydroxyapatite (n-HA) was successfully deposited on the PLLA and PLLA/Col nanofibers. We observed that the formation of n-HA on PLLA/Col nanofibers was faster and significantly more uniform than on pure PLLA nanofibers. The n-HA significantly improved the hydrophilicity of PLLA/Col nanofibers. From the results of cell attachment studies, n-HA deposition enhanced the cell capture efficacy at the 20-minute time point for PLLA nanofibers. The E-modulus values for PLLA+n-HA with cells (day 1 and day 4) were significantly higher than for PLLA+n-HA without cells. Based on these observations, we have demonstrated that n-HA deposition on nanofibers is a promising strategy for early cell capture.
URI: http://dx.doi.org/10.1089/ten.tea.2008.0011
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10042
http://hdl.handle.net/10054/10042
Date: 2009


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