{"id":5247,"date":"2023-03-06T18:19:06","date_gmt":"2023-03-06T16:19:06","guid":{"rendered":"https:\/\/micronora.com\/?p=5247"},"modified":"2023-03-06T18:19:50","modified_gmt":"2023-03-06T16:19:50","slug":"impression-3d-sur-glace-de-structures-sacrificielles-aussi-petites-que-des-vaisseaux-sanguins","status":"publish","type":"post","link":"https:\/\/micronora.com\/en\/impression-3d-sur-glace-de-structures-sacrificielles-aussi-petites-que-des-vaisseaux-sanguins\/","title":{"rendered":"Impression 3D sur glace de structures sacrificielles aussi petites que des vaisseaux sanguins"},"content":{"rendered":"

En utilisant l’eau comme outil sacrificiel, les chercheurs de Carnegie Mellon ont cr\u00e9\u00e9 une m\u00e9thode \u00e0 l’\u00e9chelle microscopique pour l’impression 3D de structures complexes suffisamment petites pour cr\u00e9er une vascularisation dans un tissu artificiel. Cette recherche biom\u00e9dicale a potentiellement des implications pour d’autres applications \u00e0 l’\u00e9chelle microscopique et micro fluidique.<\/em><\/strong><\/p>\n

Par<\/em> St\u00e9phanie Hendrixson, Executive Editor, Additive Manufacturing <\/em><\/p>\n

Observer le processus, c’est presque assister \u00e0 quelque chose de magique, et en fait, les images ressemblent plus \u00e0 un documentaire sur la nature qu’\u00e0 un film tourn\u00e9 dans une imprimante 3D. Une structure arborescente s’\u00e9l\u00e8ve dans le cadre, chaque branche transparente s’\u00e9tirant \u00e0 partir de celles qui la pr\u00e9c\u00e8dent dans une danse \u00e9l\u00e9gante. En quelques secondes, un r\u00e9seau de minuscules branches est termin\u00e9, enti\u00e8rement imprim\u00e9 en 3D \u00e0 partir de glace.<\/p>\n

Ce proc\u00e9d\u00e9 d’impression 3D de la glace reproductible et \u00e0 grande vitesse est le r\u00e9sultat de recherches en cours \u00e0 l’universit\u00e9 Carnegie Mellon. Les professeurs Burak Ozdoganlar et Philip LeDuc, ainsi que le doctorant Akash Garg, ont explor\u00e9 une m\u00e9thode permettant de recr\u00e9er la vascularisation – les vaisseaux sanguins qui parcourent nos organes, notre peau et d’autres tissus – pour des applications biom\u00e9dicales, notamment des organes et des tissus artificiels.<\/p>\n

“La vascularisation a \u00e9t\u00e9 un probl\u00e8me cl\u00e9 dans les \u00e9chafaudages de tissus<\/strong>“, explique Ozdoganlar. “Vous pouvez cr\u00e9er en laboratoire des grappes de cellules assez grandes, mais si elles ne sont pas vascularis\u00e9es, ces cellules finissent par mourir en peu de temps parce qu’elles ne re\u00e7oivent pas de nutriments et n’\u00e9liminent pas de mat\u00e9riaux. Cela a \u00e9t\u00e9 le Graal – \u00eatre capable de cr\u00e9er une vascularisation tridimensionnelle similaire \u00e0 ce que nous voyons dans le corps humain<\/em>.”<\/p>\n

Une partie du probl\u00e8me r\u00e9side dans le fait que ces vaisseaux sanguins sont minuscules, de l’ordre de quelques dizaines de microns. Mais c’est aussi une partie de l’opportunit\u00e9 : la ma\u00eetrise de la capacit\u00e9 \u00e0 imprimer des vaisseaux sanguins suffisamment petits pour les imiter \u00e0 d’autres applications potentielles pour la fabrication \u00e0 micro-\u00e9chelle.<\/p>\n

De la glace imprim\u00e9e en 3D comme mod\u00e8le sacrificiel<\/strong><\/p>\n

Avec cette m\u00e9thode d’impression 3D de la glace, les chercheurs ne construisent pas directement les vaisseaux ou les objets souhait\u00e9s….<\/p>\n

(Lire la suite)\u00a0<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

En utilisant l’eau comme outil sacrificiel, les chercheurs de Carnegie […]<\/p>\n","protected":false},"author":5,"featured_media":5248,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5247","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites"],"yoast_head":"\nImpression 3D sur glace de structures sacrificielles aussi petites que des vaisseaux sanguins - Micronora<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/micronora.com\/en\/impression-3d-sur-glace-de-structures-sacrificielles-aussi-petites-que-des-vaisseaux-sanguins\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Impression 3D sur glace de structures sacrificielles aussi petites que des vaisseaux sanguins - 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