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Highly porous hydroxyapatite scaffolds with elongated pores using stretched polymeric sponges as novel template

Authors
Jo, In-HwanShin, Kwan-HaSoon, Young-MiKoh, Young-HagLee, Jong-HoonKim, Hyoun-Ee
Issue Date
15-8월-2009
Publisher
ELSEVIER SCIENCE BV
Keywords
Ceramics; Porosity; Mechanical properties; Hydroxyapatite; Sponge replication
Citation
MATERIALS LETTERS, v.63, no.20, pp.1702 - 1704
Indexed
SCIE
SCOPUS
Journal Title
MATERIALS LETTERS
Volume
63
Number
20
Start Page
1702
End Page
1704
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/119487
DOI
10.1016/j.matlet.2009.05.017
ISSN
0167-577X
Abstract
This study reports a simple way of improving the compressive strength of highly porous hydroxyapatite (HA) scaffolds by adopting elongated polymeric sponges as a novel template. In this method, as-received polymeric sponges with isotropic pores were stretched uniaxially to 50% elongation at 200 degrees C for 2 h, and then coated with a HA slurry. The HA-coated sponges were heat-treated at 800 degrees C for 3 h to remove the polymeric sponges and at 1250 degrees C for 3 h to sinter the HA walls. The fabricated samples showed a highly anisotropic pore structure with elongated pores parallel to the direction of the elongation of the polymeric sponge. This simple method allowed a highly porous scaffold to have a high compressive strength of 3.8 +/- 0.1 MPa at a porosity of 76% when tested parallel to the direction of pore elongation. (C) 2009 Elsevier B.V. All rights reserved.
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