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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
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Macrochanneled poly (epsilon-caprolactone)/ hydroxyapatite scaffold by combination of bi-axial machining and
Young-Hag Koh1, Chang-Jun Bae, Jong-Jae Sun
1School of Materials Science and Engineering, Seoul National University, Seoul, 151-742, Korea. kohyh@snu.ac.k
Abstract:
A combination of bi-axial machining and lamination was used to fabricate macrochanneled poly (epsilon-caprolactone) (PCL)/hydroxyapatite (HA) scaffolds. Thermoplastic PCL/HA sheets with a thickness of 1 mm, consisting of a 40 wt% PCL polymer and 60 wt% HA particles, were bi-axially machined. The thermoplastic PCL/HA exhibited an excellent surface finish with negligible tearing of the PCL polymer and pull-out of the HA particles. The bi-axially machined sheets were laminated with a solvent to give permanent bonding between the lamina. This novel process produced three-directionally connected macrochannels in the dense PCL/HA body. The macrochanneled PCL/HA scaffold exhibited excellent ductility and reasonably high strength. In addition, good cellular responses were observed due to the osteoconductive HA particles.
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