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HERO ID
157820
Reference Type
Journal Article
Title
Cytotoxicity evaluation of ceramic particles of different sizes and shapes
Author(s)
Yamamoto, A; Honma, R; Sumita, M; Hanawa, T
Year
2004
Is Peer Reviewed?
Yes
Journal
Journal of Biomedical Materials Research. Part A
ISSN:
1549-3296
EISSN:
1552-4965
Volume
68
Issue
2
Page Numbers
244-256
Language
English
PMID
14704966
DOI
10.1002/jbm.a.20020
Abstract
When artificial hip or knee joints are implanted in the human body, they release metallic, ceramic, and polymeric debris into the surrounding tissues. The toxicity of the released particles is of two types: chemical, caused by the released soluble ions and monomers, and mechanical, a result of mechanical stimulation produced by the insoluble particles. In this study, the cytotoxicity of particles of TiO2, Al2O3, ZrO2, Si3N4, and SiC for murine fibroblasts and macrophages were examined to evaluate just their mechanical toxicity because these particles are not expected to release soluble metal ions. Different sizes and shapes of TiO2 particles were used to evaluate the effect of size and shape on particle cytotoxicity. The results suggest that the cytotoxicity of ceramic particles does not depend on their chemical species. Cytotoxicity levels were lower than those of corresponding metal ions, indicating that the mechanical toxicity of particles is lower than the chemical toxicity of released soluble ions and monomers. The differences in size did not affect the mechanical toxicity of these particles. The dendritic particles had a higher cytotoxicity level for macrophages than did spindle and spheric particles.
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