Caractérisation ultrasonore de l'interface os-implant

par Patricia Alves Franca De Mesquita

Projet de thèse en Sciences de l'ingénieur

Sous la direction de Guillaume Haïat.

Thèses en préparation à Paris Est en cotutelle avec École de Technologie Supérieure , dans le cadre de SIE - Sciences, Ingénierie et Environnement , en partenariat avec Laboratoire Modélisation et simulation multi échelle (Marne-la-Vallée) (laboratoire) depuis le 29-11-2016 .

  • Titre traduit

    Ultrasonic characterization of the bone-implant interface

  • Résumé

    Implants are often employed in orthopaedic and dental surgeries. However, risks of failure, which are difficult to anticipate, are still experienced and may have dramatic consequences. Failures are due to degraded bone remodeling at the bone-implant interface, a multiscale phenomenon of an interdisciplinary nature which remains poorly understood. The objective of this study is to provide a better understanding of the ultrasonic response of the bone-implant interface, which will allow to study the evolution of the biomechanical properties of bone tissue around an implant during the osseointegration process. To do so, a dedicated implant model will be used, which allows to work under standard conditions. Different experimental configurations will be considered, based on feasibility studies already carried out. In particular, the high frequency response of the interface will be tested with different angles of incidence. Moreover, dedicated circular transducers generating transverse wave modes will be considered. The results will be compared with other measurements carried out using various experimental modalities. The results will be used to design effective loading clinical procedures of implants and to optimize implant conception, leading to the development of therapeutic and diagnostic techniques.