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Enhancing the soft‐tissue integration of dental implant abutments - in vitro study to reveal an optimized microgroove surface design to maximize spreading and alignment of human gingival fibroblasts

Doll, Patrick W. 1; Husari, Ayman; Ahrens, Ralf 1; Spindler, Bruno; Guber, Andreas E. 1; Steinberg, Thorsten
1 Institut für Mikrostrukturtechnik (IMT), Karlsruher Institut für Technologie (KIT)

Within this work, we demonstrate the influences of different microgrooved surface topographies on the alignment and spreading of human gingival fibroblast (HGF) cells and present the optimal parameters for an improved soft-tissue integration design for dental implant abutments for the first time. Microgrooves with lateral widths from 2.5 to 75 μm were fabricated by UV-lithography and wet etching on bulk Ti6Al4V ELI material. The microstructured surfaces were compared to polished and ground surfaces as current state of the art. The resulting microtopographies were analyzed using vertical scanning interferometry and scanning electron microscopy. Samples loaded with HGF cells were incubated for 8 and 72 hr and cell orientation, spreading, resulting area, and relative gene expression were analyzed. The effect of contact guidance occurred on all microstructured surfaces yet there is a clear preferable range for the lateral widths of the microgrooves between approx. 11.5 and 13.9 μm and depths between 1.6 and 2.4 μm for an abutment surface design, where cell orientation and spreading maximizes. For structures larger than 30 μm, cell orientation, spreading and even gene expression of intercellular adhesion molecule-1 and yes-associated protein decrease.

Verlagsausgabe §
DOI: 10.5445/IR/1000131099
Veröffentlicht am 23.08.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2021
Sprache Englisch
Identifikator ISSN: 1552-4973, 1552-4981
KITopen-ID: 1000131099
HGF-Programm 43.35.02 (POF IV, LK 01) Functionality of Soft Matter and Biomolecular Systems
Erschienen in Journal of Biomedical Materials Research Part B: Applied Biomaterials
Verlag John Wiley and Sons
Band 109
Heft 11
Seiten 1768-1776
Vorab online veröffentlicht am 27.03.2021
Schlagwörter contact guidance, human gingival fibroblasts, microgrooves, Ti6Al4V, UV-lithograp
Nachgewiesen in Scopus
Web of Science
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