title: In situ cell culture monitoring on a Ti-6Al-4V surface by electrochemical techniques.
abstract: In this work, the in situ interaction between Ti-6Al-4V alloy and osteoblastic cells has been studied by electrochemical techniques as a function of time. The interaction has been monitored for cell adhesion and growth of human osteoblastic Saos-2 cells on Ti-6Al-4V samples. The study has been carried out by electrochemical techniques, e.g., studying the evolution of corrosion potential with exposure time and by electrochemical impedance spectroscopy. The impedance results have been analyzed by using different equivalent circuit models that simulate the interface state at each testing time. The adhesion of the osteoblastic cells on the Ti-6Al-4V alloy leads to surface areas with different cell coverage rates, thus showing the different responses in the impedance diagrams with time. The effect of the cells on the electrochemical response of Ti-6Al-4V alloy is clearly seen after 4 days of testing, in which two isolated and well-differentiated time constants are clearly observed. One of these is associated with the presence of the cells and the other with a passive film on the Ti-6Al-4V alloy. After 7 days of culture, the system is governed by a resistive component over a wide frequency range which is associated with an increase in the cell coverage rate on the surface due to the extracellular matrix.
authors.affiliation: Department of Materials Engineering, Degradation and Durability, National Centre for Metallurgical Research (CENIM), Superior Council of Scientific Research (CSIC), Avda. Gregorio del Amo, 8, 28040 Madrid, Spain. crisga@cenim.csic.es
authors.forename: M C
authors.initials: MC
authors.lastname: García-Alonso
authors.forename: L
authors.initials: L
authors.lastname: Saldaña
authors.forename: C
authors.initials: C
authors.lastname: Alonso
authors.forename: V
authors.initials: V
authors.lastname: Barranco
authors.forename: M A
authors.initials: MA
authors.lastname: Muñoz-Morris
authors.forename: M L
authors.initials: ML
authors.lastname: Escudero
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D018929:Cell Culture Techniques / Q000379:methods*; D045744:Cell Line, Tumor; D055664:Electrochemical Techniques / Q000295:instrumentation* / Q000379:methods*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D014025:Titanium / Q000737:chemistry*; D014639:Vanadium / Q000737:chemistry*
chemical_list: D014639:Vanadium; D000535:Aluminum; D014025:Titanium