Biomedical Engineering Reference
In-Depth Information
with Ti implant. Galvanic corrosion is present and signiicant when
the different alloys are in direct contact within the oral cavity or
tissue environments. The combination of Ti together with metals
with lower passivity can results in galvanic corrosion, whereas Ti
combine together with higher resistant metal result in a passive
coupling being formed. The current low in the formed corrosion
cell at the metals contact interface could lead to bone destruction.
The coupled alloys should have the minimum potential differences
(Fig. 5.1) which minimize the galvanic corrosion rate at the metal
joint [21].
Table 5.11
Composition and manufacture of coupled alloy [50]
Composition
(wt%)
Alloy
Code
Trade name
Manufacturer
Co-Cr
R2000 Remanium
2000
Dentaurum,
Germany
61% Co, 25%
Cr, 7% Mo, 5%
W, 1.5% Si
Co-Cr
R800 Remanium 800 Dentaurum,
Germany
63.5% Co,
30% Cr, 5%
Mo, 1% Si
Ni-Cr
RCS Remanium CS Dentaurum,
Germany
61% Ni, 26%
Cr, 11% Mo,
1.5% Si, <1%
Fe, Ce, Al
Ag-Pd
Jel
Jelstar
Jelenko, USA 60% Pd, 28%
Ag, 6% Sn,
6% In
Au
Pont Pontallor-4
Degussa,
Germany
40% Au, 7.9%
Pd, 35% Ag,
7% Cu, 2% Sn,
2% Ir,
5% In, 3.5%
Zn
Ternary
titanium
Ter Ti Experimental
60% Ti, 10%
Ag, 30% Cu
Endossseous
Ti implant
healing
abutment
(SCPB-010)
SSTi Rematitan
Dentaurum,
Germany
0.12% O,
0.05% N,
0.06% C,
0.013% H, rest
Ti; (vol %)
Amalgam
Amalg Dispersalloy J&J, Ireland
34.8% Ag,
8.9% Sn, 5.9%
Cu, 0.3% Zn,
50% Hg
