The project uses numerical methods to investigate to what extent periprosthetic bone quality and density around an implant can be measured using electrochemical impedance spectroscopy and electrical impedance tomography, with the aims of (i) detecting the loosening of hip stems in the context of total hip arthroplasty at an early stage and (ii) assessing the state of bone growth after mandibular reconstruction. Electromagnetic simulation of soft-tissue–bone–implant systems poses several challenging problems, which will be addressed using a low-frequency-stabilized full-wave simulator to be developed for this purpose.