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Rotational UV-lithography using flexible chromium coated polymer masks for the fabrication of microstructured dental implant surfaces: a proof of concept

Doll, Patrick Wolfgang; Doll, Christian; Käßer, Lukas; Häfner, Melanie; Spindler, Bruno; Ahrens, Ralf; Nahles, Susanne; Heiland, Max; Guber, Andreas Erwin

Abstract:
The purpose of this work was to demonstrate the technical feasibility for the fabrication of microgrooves or micropits on dental implants or dental implant abutment surfaces using a novel fabrication method derived from common UV-lithographic microfabrication. Instead of using a flat and rigid chromium/glass mask to structure a photoresist layer on a small cylindrical part, a flexible chromium-coated polymer mask was introduced into the lithographic setup. Through an elastic deformation of the polymer mask, it was possible to achieve lateral resolutions as small as 1.5 μm on small cylinders and to structure conical parts. By subsequent controlled under-etching of the structured photoresist layer, microgrooves of different cross-sectional geometries can be generated and applied to the implant or implant abutment surface. Such structures can be used for contact guidance of human gingival fibroblasts or endothelia cells to enhance the wound healing process and the overall soft-tissue integration.

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Verlagsausgabe §
DOI: 10.5445/IR/1000105686
Veröffentlicht am 28.02.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 0960-1317, 1361-6439
KITopen-ID: 1000105686
HGF-Programm 47.02.07 (POF III, LK 01)
Zellpopul.auf Biofunk.Oberflächen IMT
Erschienen in Journal of micromechanics and microengineering
Band 30
Heft 4
Seiten Art. Nr.: 045008
Vorab online veröffentlicht am 28.01.2020
Schlagwörter rotational lithography, microgrooves, soft-tissue integration, dental implants
Nachgewiesen in Web of Science
Scopus
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