Relation between Metal Corrosion and Electrical Polarization
The increasing use of metals as implant materials in orthopaedic surgery has stimulated a considerable amount of interest among researchers and orthopaedic surgeons enabling the study of corrosion, wear, hypersensitivity, toxcity and carcinogenicity (Furst and Haro, 1960; Mears, 1979; Woodman, 1980). Partly, the corrosion Phenomena is due to the metal implant ionization in living tissue (Ferguson et al, 1960; Lautenschlager et al, 1974). Corrosion is a complex electrochemical deterioration of metals (Clark and Hickman, 1953). Futhermore, corrosion is referred to as a combination of oxidation and reduction of reactions at the implant-tissue interface. The basic reactions in corrosion are the removal of positive metal ions from their positions in the metal crystal lattice. This is called an anodic reaction. Similarly, the freed electrons, as a result of removed cations, also react to oxygen and hydrogren molecules in tissues to form hydroxyle. This is defined as cathodic reactions at the metal-tissue interface (Mears, 1979).
KeywordsTitanium Nickel Zirconium Hydroxyle Platinum
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- Brettle, J., 1971, Stress corrosion cracking of Surgical implant materials. Atomic Weapons Research Establishment (Aldermaston) Report GR/44/83/73.Google Scholar
- Brunski, J.B., 1982, In vivo forces on endosseous dental implants, II-transducer and telemetry. J. Dent. Res. 61:282.Google Scholar
- Clark, E.G.C. and Hickman, J., 1953, An investigation into the correlation between the electrical potentials of metals and their behaviour in biological fluids. J. Bone and Joint Surg., 35-B:467.Google Scholar
- Ferguson, A.B. Jr, Laing, P.G., Hode, E.S., 1960, The ionization of metal implants on living tissues. J Bone and Joint Surg, 42A:77.Google Scholar
- Furst,A and Haro, H., 1969, A survey of metal carcenogenesis, proc. Exp Tumor Res. 12:102.Google Scholar
- Mears, D.C., 1979, The dissolution of implantable materials. In: Materials and Orthopaedic Surgery, Chapter 4, pp 107, (Baltimore, The Williams & Wilkins Company, Publishers).Google Scholar
- Singh, S., 1982, Ultrasound generation and propagation in hard tissues. Ph.D. Thesis. Jawaharlal Nehru University, New Delhi, India.Google Scholar
- Woodman, J.L., 1980, Organometallic corrosion product: an in vivo and in vitro comparison Ph.D. (dissertation), University of Pennsylvania, Philadelphia.Google Scholar