Characterization of microrough bioactive glass surface: Surface reactions and osteoblast responses in vitro

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Itala A, Ylanen HO, Yrjans J, Heino T, Hentunen T, Hupa M, Aro HT
Publisher: JOHN WILEY & SONS INC
Publication year: 2002
Journal: JOURNAL OF BIOMEDICAL MATERIALS RESEARCH
Journal acronym: J BIOMED MATER RES
Volume number: 62
Issue number: 3
Start page: 404
End page: 411
Number of pages: 8
ISSN: 0021-9304


Abstract

The current study characterized the in vitro surface reactions of microroughened bioactive glasses and compared osteoblast cell responses between smooth and micro-rough surfaces. Three different bioactive glass compositions were used and surface microroughening was obtained using a novel chemical etching method. Porous bioactive glass specimens made of sintered microspheres were immersed in simulated body fluid (SBF) or Tris solutions for 1, 6, 24, 48, or 72 h, and the formation of reaction layers was studied by means of a scanning electron microscope/energy dispersive X-ray analysis (SEM/EDXA). Cell culture studies were performed on bioactive glass disks to examine the influence of surface microroughness on the attachment and proliferation of human osteoblast-like cells (MG-63). Cell attachment was evaluated by means of microscopic counting of in situ stained cells. Cell proliferation was analyzed with a nonradioactive cell proliferation assay combined with in situ staining and laser confocal microscopy. The microroughening of the bioactive glass surface increased the rate of the silica gel layer formation during the first hours of the immersion. The formation of calcium phosphate layer was equal between control and microroughened glass surfaces. In cell cultures on bioactive glass, the microrough surface enhanced the attachment of osteoblast-like cells but did not have an effect on the proliferation rate or morphology of the cells as compared with smooth glass surface. In conclusion, microroughening significantly accelerated the early formation of surface reactions on three bioactive glasses and had a positive effect on initial cell attachment. (C) 2002 Wiley Periodicals, Inc.


Keywords

microrough surface, osteoblast-like cells, porous, surface reactions

Last updated on 2020-26-02 at 03:42