A hybrid PCL/collagen scaffold consisting of solid freeform-fabricated struts and EHD-direct-jet-processed fibrous threads for tissue regeneration

• Published in: Journal of colloid and interface science Vol. 450; pp. 159 - 167
• Main Authors: Yang, Gi-Hoon, Kim, Minseong, Kim, GeunHyung
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 15.07.2015
• Subjects: Animals; Cell Line; Collagen; Collagen - chemistry; Hybrid scaffold; Materials Testing; Mice; Osteoblasts - cytology; Osteoblasts - metabolism; Polycaprolactone; Polyesters - chemistry; Regeneration; Tissue regeneration; Tissue Scaffolds - chemistry; Tissue regeneration; Polycaprolactone; Collagen; Hybrid scaffold
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2015.02.070

[Display omitted] Hybrid biomedical structures have been used widely in various tissue-regenerating materials because they effectively induce exceptional physical and cellular responses. In this study, a new hybrid process was used to design a three-dimensional (3D) biomedical hybrid scaffold with a controlled pore-structure and high mechanical strength. A melt-dispensing method was used to obtain mechanical properties and electrohydrodynamic direct-jet (EHD-DJ) printing was used to provide microsized fibrous structures for the scaffold. Furthermore, the poly(ε-caprolactone) (PCL) hybrid scaffolds were coated biomimetically with type-I collagen to increase bioactive interactions between cells and scaffolds. The fabricated scaffolds showed similar mechanical properties to the two control scaffolds; however, the results of culturing osteoblast-like (MG63) cells showed significant increases in in vitro cellular activities (cell viability>twofold and calcium deposition>sevenfold). Based on these results, we propose a newly designed hybrid scaffold that can support significant in vitro cellular activities at the interface between cells and the 3D micro-pore structure for soft and hard tissue regeneration.