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새로운 바이오 복합 인공지지체의 생체 적합성 및 골형성 성능 평가
신원수(Yuan-Zhu XIn),이준희(Jun-Hee Lee),김영율(Young-Yul Kim),권미령(Mei-Ling Quan),김기정(Ki-Jung Kim),최영현(Young-Hyun Choi),양석조(Seok-Jo Yang) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
The scaffolds play an important role in tissue engineering which is a research field for artificial substitutes, since they act as substrates for cell adhesion, proliferation and regeneration of new tissue. In this study, a biodegradable Mg-PCL complex scaffold was developed for bone tissue engineering applications. They were made by mixing polycaprolactone (PCL) as base matrix and some magnesium-ion compound particles, and solid Freeform (SFF) method was used for their fabrication. As a result, the developed scaffold had the following characteristics. Firstly, by contact angle measurement, we knew that their hydrophilicity was enhanced due to adding magnesium-ion compound. Secondly, the compressive mechanical test showed that their elastic modulus was higher than pure PCL scaffolds. Thirdly, the in-vitro cell culture study showed that cells in new scaffolds proliferated faster than in the case of the PCL scaffolds. Consequently, it is found that the Mg-PCL complex scaffold is more effective and suitable substrates for cell culture
다종소재를 사용하는 다기능 3D 프린팅 시스템 개발과 활용
박정환(Jung Whan Park),이준희(Junhee Lee),신원수(Yuan-Zhu Xin),변기석(Ki-Seok Byoun) 대한기계학회 2018 大韓機械學會論文集A Vol.42 No.4
본 연구는 다종 소재를 이용하여 다양한 형상의 적층제작이 가능한 다기능 3D 프린팅 시스템 개발과 활용을 다루었다. 현재 3D 프린팅은 의료, 전자, 식품 등 제조업에서 활발하게 사용되고 있다. 본 시스템은 여러 개의 노즐로 다종 소재를 토출하여 이종 재료로 대상 제품을 제작하는 것을 목적으로 하며, 주요 적용 대상은 인공장기, 뼈, 비루관 등 생체장기 조직을 대체하는 바이오 스캐폴드와 다층 인쇄전자회로이다. 개발된 프린팅 시스템은 구동부와 디스펜서, 형상정의 및 조형경로 생성용 소프트웨어로 구성되며, 현재 스캐폴드와 PCB 시험제작용으로 사용되고 있다. 향후 다른 분야로의 적용을 위한 확장 또한 용이할 것으로 사료된다. A flexible multi-nozzle 3D printing system to fabricate multi-material product has been developed and utilized. It is well known that 3D printing technology has widely been used in various areas such as medical, electronic and food industries. The developed system has a purpose of fabricating multi-material products: bio-scaffolds and multi-layered printed circuit boards. The system consists of hardware(mechanical and dispensing units) and software(shape modeling and plotting path generation). It is currently used for fabrication of bio-scaffolds and PCB products, which is expected to be applied to fabrication of other kinds of products.