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Proceedings Paper

Process development for high-resolution 3D-printing of bioresorbable vascular stents
Author(s): Henry Oliver T. Ware; Adam C. Farsheed; Robert van Lith; Evan Baker; Guillermo Ameer; Cheng Sun
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Paper Abstract

The recent development of “continuous projection microstereolithography” also known as CLIP technology has successfully alleviated the main obstacles surrounding 3D printing technologies: production speed and part quality. Following the same working principle, we further developed the μCLIP process to address the needs for high-resolution 3D printing of biomedical devices with micron-scale precision. Compared to standard stereolithography (SLA) process, μCLIP fabrication can reduce fabrication time from several hours to as little as a few minutes. μCLIP can also produce better surface finish and more uniform mechanical properties than conventional SLA, as each individual “fabrication layer” continuously polymerizes into the subsequent layer. In this study, we report the process development in manufacturing high-resolution bioresorbable stents using our own μCLIP system. The bioresorbable photopolymerizable biomaterial (B-ink) used in this study is methacrylated poly(1, 12 dodecamethylene citrate) (mPDC). Through optimization of our μCLIP process and concentration of B-ink components, we have created a customizable bioresorbable stent with similar mechanical properties exhibited by nitinol stents. Upon optimization, fabricating a 2 cm tall vascular stent that comprises 4000 layers was accomplished in 26.5 minutes.

Paper Details

Date Published: 28 April 2017
PDF: 11 pages
Proc. SPIE 10115, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics X, 101150N (28 April 2017); doi: 10.1117/12.2252856
Show Author Affiliations
Henry Oliver T. Ware, Northwestern Univ. (United States)
Adam C. Farsheed, Northwestern Univ. (United States)
Robert van Lith, Northwestern Univ. (United States)
Evan Baker, Northwestern Univ. (United States)
Guillermo Ameer, Northwestern Univ. (United States)
Cheng Sun, Northwestern Univ. (United States)


Published in SPIE Proceedings Vol. 10115:
Advanced Fabrication Technologies for Micro/Nano Optics and Photonics X
Georg von Freymann; Winston V. Schoenfeld; Raymond C. Rumpf, Editor(s)

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