Semi-conducting properties of titanium dioxide surfaces on titanium implants

Surface characterization, electrochemical properties and in vitro testing of hierarchically structured titanium surfaces

“…Surface charge and electrical properties of the titanium oxide can thus influence the tissue response. In an earlier paper semiconducting properties of modified titanium samples were investigated by electrochemical impedance spectroscopy [22]. The results from this study showed that the electric properties of the titanium oxide film can be changed both by physical-and chemical surface treatments.…”

“…Improved biocompatibility has also been observed using other ions such as magnesium or fluoride ions [15][16][17][18]. In addition, a limited number of studies have considered changes in the electrical properties of the titanium oxide as a consequence of the performed modifications [19][20][21][22].…”

Kinetics of passivity of NiTi in an acidic solution and the spectroscopic characterization of passive films

“…11, the charge carrier densities were determined. The values of N D range from 1.2×10 20 to 0.6× 10 20 cm −3 indicating that the oxide layer behaves like a highly doped n-type semiconductor [59]. It was observed that N D decreased exponentially with E f in accordance with the theory, and relevant equation describing this dependence is given [46] N D ¼ w 1 exp ÀbE f ½ þw 2 ð12Þ…”

“…The double layer capacitance for the oxide water interface is in the order of 100 μF cm −2 [58,59]. Since the capacitances are connected in series, the lowest capacitance will dominate, and therefore, the contribution of C dl to the total capacitance is negligible.…”

Characterisation of Titanium Dental Implants. II: Local Biomechanical Model~!2009-09-02~!2009-11-20~!2010-04-28~!

“…This together with the fact that a correlation between S a and removal torque can be found for certain surfaces, indicates that all topographical factors affecting the retention strength are not included in the Local calculation model. Other factors such as chemical composition [66,67,69,70] and electrical properties [71] have been discussed in terms of influencing the retention strength. The calculated results showed a similar trend to interface shear strength results reported in vivo [7,11,65,66] The local model described in the present paper has some inherent limitations, for example in the derivation of the formulae for interfacial shear strength it was assumed that the bone-to-implant contact was 100%.…”