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Abstract(s)
The titanium implant/zirconia abutment interface can suffer failure upon mechanical and biological issues, ul-
timately leading to the loss of the artificial tooth. The study of the effect of the organic compounds present in
saliva on the tribological behavior of these systems is of utmost importance to understand the failure mechanisms
and better mimic the in vivo conditions. The aim of the present work is to evaluate the effect of the addition of
albumin, urea, lysozyme and mucin to artificial saliva, on the triboactivity of Ti6Al4V/zirconia pair commonly
used in dental implants and then, compare the results with those obtained with human saliva. The solutions’
viscosity was measured and the adsorption of the different biomolecules to both Ti6Al4V and zirconia was
accessed. Tribological tests were performed using Ti6Al4V balls sliding on zirconia plates inside of a corrosion
cell. Friction and wear coefficients were determined, and the open circuit potential (OCP) was monitored during
the tests. Also, the wear mechanisms were identified. The presence of mucin in the artificial lubricant led to the
lowest wear coefficients. The main wear mechanism was abrasion, independently of the used lubricant. Adhesive
wear was observed for the systems without mucin. Tribocorrosion activity and wear coefficient were lower in the
presence of mucin. None of the studied artificial lubricants mimicked the effect of human saliva (HS) on the
tribological behavior of the studied pair since this lubricant led to the lowest friction coefficient and highest
corrosion activity.
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Citation
eixeira, H., Branco, A. C., Rodrigues, I., Silva, D., Cardoso, S., Colaço, R., Serro, A. P., & Figueiredo-Pina, C. G. (2021). Effect of albumin, urea, lysozyme and mucin on the triboactivity of Ti6Al4V/zirconia pair used in dental implants. Journal of the mechanical behavior of biomedical materials, 118, 104451