Fabrication of Dual-morphing Vascular Stents Using Additive-lathe Printing of Shape Memory Polymers

김유석; 이승문; 박석희

doi:10.7736/JKSPE.023.077

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저널정보

Korean Society for Precision Engineering
Journal of the Korean Society for Precision Engineering 학술저널
Journal of the Korean Society for Precision Engineering Vol.40 No.10
2023.10 797 - 803 (7page)
DOI : 10.7736/JKSPE.023.077

저자정보

김유석 (부산대학교)
이승문 (부산대학교)
박석희 (부산대학교)

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초록·키워드

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In this study, we present the fabrication of dual-morphing vascular stents using an additive-lathe printing method and two different shape-memory polymers. Traditional additive manufacturing techniques confront significant challenges in producing vascular stents with complex, hollow, mesh-like structures due to limitations such as a flat printing bed and the placement of supports. To overcome these obstacles, we employed a lathe-type additive manufacturing system with a rotatable base substrate, enabling precise fabrication of cylindrical-shaped stents. To achieve shape transformability, we used shapememory polymers as the stent materials, offering the advantage of minimally invasive surgery. Two distinct shape-memory polymers, with different transition temperatures (35 and 55oC), were printed using the additive-lathe method. The printed stents consisted of two distinct parts that underwent dual-stage morphological changes at the different temperatures. By manipulating the printing paths, the dual-morphing properties of the stents could be adjusted in both longitudinal and circumferential directions. This innovative approach could be a solution to several limitations associated with the application of stents in diseased vascular tissues with complex shapes, facilitating minimal invasion during surgical procedures.

#Additive manufacturing (적층 제조) #Shape memory polymer (형상기억 폴리머) #Vascular stent (혈관 스텐트) #4D printing (4D 프린팅)