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Fabrication of three-dimensional polycaprolactone/hydroxyapatite tissue scaffolds and osteoblast-scaffold interactions in vitro

Paper ID Volume ID Publish Year Pages File Format Full-Text
10472 686 2007 7 PDF Available
Title
Fabrication of three-dimensional polycaprolactone/hydroxyapatite tissue scaffolds and osteoblast-scaffold interactions in vitro
Abstract

Computer-aided tissue-engineering approach was used to develop a novel precision extrusion deposition (PED) process to directly fabricate Polycaprolactone (PCL) and composite PCL/hydroxyapatite (PCL–HA) tissue scaffolds. The process optimization was carried out to fabricate both PCL and PCL–HA (25% concentration by weight of HA) with a controlled pore size and internal pore structure of the 0°/90° pattern. Two groups of scaffolds having 60% and 70% porosity and with pore sizes of 450 and 750 μm, respectively, were evaluated for their morphology and compressive properties using scanning electron microscopy (SEM) and mechanical testing. Our results suggested that inclusion of HA significantly increased the compressive modulus from 59 to 84 MPa for 60% porous scaffolds and from 30 to 76 MPa for 70% porous scaffolds. In vitro cell-scaffolds interaction study was carried out using primary fetal bovine osteoblasts to assess the feasibility of scaffolds for bone tissue-engineering application. The cell proliferation and differentiation were calculated by Alamar Blue assay and by determining alkaline phosphatase activity. The osteoblasts were able to migrate and proliferate over the cultured time for both PCL as well as PCL–HA scaffolds. Our study demonstrated the viability of the PED process to the fabricate PCL and PCL–HA composite scaffolds having necessary mechanical property, structural integrity, controlled pore size and pore interconnectivity desired for bone tissue engineering.

Keywords
Bone tissue engineering; Polycaprolactone; Hydroxyapatite; Composite; Free form fabrication; Precision extrusion deposition
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Fabrication of three-dimensional polycaprolactone/hydroxyapatite tissue scaffolds and osteoblast-scaffold interactions in vitro
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 28, Issue 35, December 2007, Pages 5291–5297
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us