Complementary method used for noninvasive evaluation of some medical prostheses

Savin, Adriana; Institutul National de Cercetare-Dezvoltare pentru Fizica Tehnica; Romania

Savin, A.; National Institute for Research and Development for Technical Physics; Romania
Craus, M.L.; National Institute for Research and Development for Technical Physics; Romania
Steigmann, R.; National Institute for Research and Development for Technical Physics; Romania
Turchenko, V.; Joint Institute for Nuclear Research; Russia
Bruma, A.; National Institute of Standards and Technology; USA
Konstantinova, T.E.; Donetsk Institute for Physics and Engineering; Ukraine

ID: ECNDT-0421-2018
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Session: X-ray radiography 2
Room: G3
Date: 2018-06-11
Time: 16:20 - 16:40

Medical ceramics materials include a wide range of bioactive composites such as glasses, glass-ceramics and ceramic-polymers. Biocompatibility and resistance to mechanical stress are one of the most important features when designing new materials based on ceramics for medical implants. Zirconia (ZrO2)-based ceramics are preferred due to their advanced mechanical properties such as high-fracture toughness and bulk modulus, corrosion resistance, high dielectric constant, chemical inertness, low chemical conductivity and biocompatibility. The medical prosthesis components made from ZrO2 oxides present a very good biocompatibility as well as especially mechanical properties. To improve of Zr-based ceramics properties, most used doping is carried out with rare earths (i.e.Ceria or Yttria). In order to ensure implant safety of these prostheses, wide ranges of examinations based on complementary methods for nondestructive evaluation are imperative for these medical implants. The structural investigations proposed in this paper are based on X-ray and neutron diffraction in order to establish a first indication of the variation of the phase composition and the structural parameters, as well as micro-hardness measurements and non-destructive evaluations in order to establish a correlation between the structural parameters and mechanical properties of the samples. These ranges of tests are imperative in order to ensure the safety and reliability of these composite materials, which are widely used as hip-implants or dental implants/coatings. In addition, of resonant spectrum, which makes use of the resonance frequencies corresponding to the normal vibrational modes of a solid in order to evaluate the elastic constants of the materials, we emphasize a unique approach on evaluating the physical properties of these ceramics, which could help in advancing the understanding of properties and applications in medical fields.