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SUMMARY:Bio-tribo-electrochemical degradation of titanium-based materials 
 for dental implants application
DTSTART:20180423T110000
DTEND:20180423T114500
DTSTAMP:20260916T070242Z
UID:aee5fe345167fd96453ace18a775737be729b7ab168e124b94a6adf7
CATEGORIES:Conferences - Seminars
DESCRIPTION:PhD Valentim Adelino Ricardo Barão Valentim Barao is an assoc
 iate professor at the University of Campinas (UNICAMP) in Brazil.  He
  has a PhD in Prosthodontics from the São Paulo State University (UNES
 P) and was a research fellow at the College of Dentistry of the Universi
 ty of Illinois and at the Rush University Medical Center\, bith in Chica
 go\, USA. His research interests are focused in the multidisciplinary deg
 radation mechanisms of biomedical alloys for dental applications.      
    \nIn the oral cavity titanium dental implants are subjected to a comp
 lex degradation process involving chemical/electrochemical\, mechanical an
 d microbiological components. The chemical elements of saliva such as chlo
 ride\, fluoride and H ions\, changes in pH and temperature are promoters o
 f the chemical degradation of implants named as corrosion. In addition to 
 the chemical/electrochemical degradation process\, titanium-based material
 s exhibit poor wear resistance and\, thus\, a synergism effect between the
  chemical and mechanical degradation processes known as tribocorrosion can
  occur. This mechanism of degradation becomes more complex by the presence
  of a structured community of microorganisms surrounded by an extracellula
 r matrix called biofilm. Clinically\, such degradation process may affect 
 the biocompatibility and function of dental implants\, or even exacerbate 
 an inherent condition for failure of the rehabilitation treatment. Therefo
 re\, the aim of this presentation is to discuss the basic corrosion kinet
 ics and tribocorrosion behavior of titanium dental implants into simulated
  oral environment. The roles of titanium material\, surface treatments\, s
 aliva pH\, infection (simulated by the presence of lipopolysaccharide)\, h
 yperglycemic condition and mastication on the electrochemical activity of 
 titanium will be presented. The possible implications of corrosion on the 
 lipopolysaccharide affinity and periodontopathogenic bacteria attachment w
 ill also be assessed. \n \n 
LOCATION:MXC 315 https://plan.epfl.ch/?room=MXC315
STATUS:CONFIRMED
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