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Sökning: WFRF:(Esposito Marco 1965) > (2000-2004)

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  • Suska, Felicia, 1974, et al. (författare)
  • In vivo/ex vivo cellular interactions with titanium and copper.
  • 2001
  • Ingår i: Journal of materials science. Materials in medicine. - 0957-4530 .- 1573-4838. ; 12:10-12, s. 939-44
  • Tidskriftsartikel (refereegranskat)abstract
    • Machined, commercially pure titanium (Ti) disks were coated with approximately 400 nm copper (Cu) by physical vapor deposition or left uncoated. The kinetics of inflammatory cell recruitment, distribution and viability was evaluated around Ti, Cu, and in sham sites after 1, 3, 12, 18, 24, and 48 h in a rat subcutaneous (s.c.) model. Further analysis of the cells on implant surfaces was performed by ex vivo incubation of the disks. Ti and Cu stimulated an increased recruitment of inflammatory cells in comparison with sham sites. A markedly higher amount of cells, predominantly polymorpho-nuclear granulocytes (PMN), was detected around Cu after 18 h and onwards. More cells were found at the implant surfaces than in the surrounding exudates after 18 h. The total amount of lactate dehydrogenase (LDH), an indicator of plasma membrane injury, was higher in Cu exudates after 18 h in comparison with Ti and sham. In contrast, no differences in the proportion of dead cells (trypan blue dye uptake) were detected in the exudates. Further, LDH levels were higher around Ti than Cu during the initial 18 h of ex vivo incubation. The results of this study indicate that the early inflammatory process associated with a cytotoxic material in soft tissues is largely attributed to the induction of a markedly strong and prolonged chemotactic response. In contrast, this process is characterized by a higher amount of inflammatory cells around a biocompatible material than in sham sites, but with a transient course and total LDH similar to sham sites.
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