| 초록 |
We herein propose a novel way for manufacturing highly porous biphasic calcium phosphate (BCP) scaffolds with tubular structure with proper mechanical properties using rapid direct deposition of dual phase initial feed rod, which are consisted of a carbon black paste core with ceramic paste as a shell. This novel technique make full use of inherent propriety of methylcellulose (MC) polymer used as the binder in aqueous system for fabricating stable initial feed rod. This allowed samples with dual pore structure both 3-dementionally fully interconnect pore and interconnected tubular BCP channel. In this study, to accomplish the goal, one of the advanced and promising technique named ‘RDD-Robot ; rapid direct deposition robot’ system is applied to fabricating 3-D porous bio-ceramic scaffold and controlling their pore structure specifically the porosity with a BCP as a starting materials, which is well known as a one of the most biocompatible bio-ceramic. The 3-D porous BCP scaffolds are deposited in acetone bath by using air pressed 3-D RDD robot with a syringe and 20-gauge nozzle tip. In the syringe, BCP-MC(methyl cellulose) paste which are comprised of 60wt% of BCP and 5wt% of MC(methyl cellulose) in relation to distilled water, are packed. The characteristics of sintered 3-D porous BCP scaffolds were closely observed by SEM (scanning electron microscopy) and their mechanical property in terms of compressive strength is examined. |
