title: Novel hydroxyapatite (HA) dual-scaffold with ultra-high porosity, high surface area, and compressive strength.
abstract: A novel scaffold designed for tissue engineering applications, which we refer to as a "dual-scaffold" because its structure consists of two interlaced three-dimensional (3-D) hydroxyapatite (HA) networks, was fabricated using a combination of the rapid prototyping (RP) method and dip-coating process. To accomplish this, a graphite network acting as a template was prepared using the RP method and then uniformly dip-coated with HA slurry. The resultant sample was then heat-treated at 1250 degrees C for 3 h in air to remove the graphite network and consolidate the HA networks. An additional 3-D channel was formed by removing the graphite network, while preserving the pre-existing channel. The unique structure of the dual-scaffold endows it with unprecedented features, such as ultra-high porosity (>85%), a high surface area and high compressive strength, as well as a tightly controlled pore structure. In addition, an excellent cellular response was observed to the fabricated HA dual-scaffold.
authors.affiliation: School of Materials Science and Engineering, Seoul National University, Seoul 151-742, Korea.
authors.forename: In-Kook
authors.initials: IK
authors.lastname: Jun
authors.forename: Young-Hag
authors.initials: YH
authors.lastname: Koh
authors.forename: Su-Hee
authors.initials: SH
authors.lastname: Lee
authors.forename: Hyoun-Ee
authors.initials: HE
authors.lastname: Kim
mesh_terms: D018786:Bone Substitutes / Q000737:chemistry*; D019245:Compressive Strength; D017886:Durapatite / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry; D008422:Materials Testing; D016062:Porosity; D013499:Surface Properties; D023822:Tissue Engineering
chemical_list: D018786:Bone Substitutes; D006108:Graphite; D017886:Durapatite