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Increased osteoblast adhesion on nanophase metals: Ti, Ti6Al4V, and CoCrMo

Paper ID Volume ID Publish Year Pages File Format Full-Text
13400 853 2004 9 PDF Available
Title
Increased osteoblast adhesion on nanophase metals: Ti, Ti6Al4V, and CoCrMo
Abstract

Previous studies have demonstrated increased functions of osteoblasts (bone-forming cells) on nanophase compared to conventional ceramics (specifically, alumina, titania, and hydroxyapatite), polymers (such as poly lactic-glycolic acid and polyurethane), carbon nanofibers/nanotubes, and composites thereof. Nanophase materials are unique materials that simulate dimensions of constituent components of bone since they possess particle or grain sizes less than 100 nm. However, to date, interactions of osteoblasts on nanophase compared to conventional metals remain to be elucidated. For this reason, the objective of the present in vitro study was to synthesize, characterize, and evaluate osteoblast adhesion on nanophase metals (specifically, Ti, Ti6Al4V, and CoCrMo alloys). Such metals in conventional form are widely used in orthopedic applications. Results of this study provided the first evidence of increased osteoblast adhesion on nanophase compared to conventional metals. Interestingly, osteoblast adhesion occurred preferentially at surface particle boundaries for both nanophase and conventional metals. Since more particle boundaries are present on the surface of nanophase compared to conventional metals, this may be an explanation for the measured increased osteoblast adhesion. Lastly, material characterization studies revealed that nanometal surfaces possessed similar chemistry and only altered in degree of nanometer surface roughness when compared to their respective conventional counterparts. Because osteoblast adhesion is a necessary prerequisite for subsequent functions (such as deposition of calcium-containing mineral), the present study suggests that nanophase metals should be further considered for orthopedic implant applications.

Keywords
Nanotechnology; Metals; Ti; Ti6Al4V; CoCrMo; Osteoblasts
First Page Preview
Increased osteoblast adhesion on nanophase metals: Ti, Ti6Al4V, and CoCrMo
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 25, Issue 19, August 2004, Pages 4731–4739
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering