Journal
BIOMATERIALS
Volume 28, Issue 30, Pages 4521-4534Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biomaterials.2007.06.028
Keywords
titanium; surface modification; plasma polymerization; hyaluronan; actin; adhesion molecules
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The crucial factor of metal implant ingrowth in the bone is the rapid cellular acceptance. Therefore, the knowledge about additionally used adhesion mechanisms of osteoblasts, like their negatively charged hyaluronan coat, generates new surface functionalization strategies. Here, titanium was coated with a very thin, adherent, cross-linked, pinhole- and additive-free allylamine plasma polymer layer (PPAAm) resistant to hydrolysis and delamination and equipped with a high density of positively charged amino groups. This plasma polymer-functionalization of titanium is advantageous concerning osteoblastic focal adhesion formation as vinculin and paxillin, actin cytoskeleton development and, in consequence in differentiated cell functions, compared to a pure titanium surface-but similar such as the collagen I bonded surface via a polyethylenglycol-diacid (PEG DA)-spacer. (c) 2007 Elsevier Ltd. All rights reserved.
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