Collagen I-coated titanium surfaces: Mesenchymal cell adhesion and in vivo evaluation in trabecular bone implants

M. Morra, C. Cassinelli, G. Cascardo, L. Mazzucco, P. Borzini, M. Fini, G. Giavaresi, R. Giardino

Research output: Contribution to journalArticlepeer-review

Abstract

The goal of the study was the evaluation of the effect of modification of titanium implants by acrylic acid surface grafting-collagen I coupling. Tests were performed on titanium samples treated by galvanostatic anodization to create a porous surface topography. Surface characterization by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) confirms the biochemical modification of the surface and shows a surface topography characterized by pores mostly below 1 μm diameter. In vitro evaluation involving human mesenchymal cells shows enhanced cell growth on collagen coated surfaces as compared to titanium ones. Four weeks in vivo evaluation of implants in rabbit femur trabecular bone shows improvements of bone-to-implant contact, while improvement of bone in-growth is slightly not significant (p = 0.056), when compared to the control. Overall, these data indicate that integration in trabecular, or cancellous, bone can be enhanced by the surface collagen layer, confirming previous findings obtained by modification of machined surfaces by the same approach in cortical bone implants.

Original languageEnglish
Pages (from-to)449-458
Number of pages10
JournalJournal of Biomedical Materials Research - Part A
Volume78
Issue number3
DOIs
Publication statusPublished - Sep 1 2006

Keywords

  • Bone implant
  • Mesenchymal cells
  • Surface analysis
  • Surface modification
  • Titanium

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials

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