The implants are composed of non ferromagnetic materials and present a geometry non susceptible to generate induced currents. Moreover, as they are fixed to bone/or /tissues, they are unlikely to be mobilised. A priori they can be considered compatible with an MRI scan. Their safety, in particular in terms of heating and migration of implant has been avaluated through bibliographic data by comparison with data available on devices with similar composition, shape and use. This evaluation concluded to a safety use for MRI scan between 1.5 and 3 Tesla.