The invention relates to a replacement metallic prosthesis to be implanted which contains means monitor its condition during use in order to allow an early detection of failure or insufficient functionality, wherein said means comprise implanted sensors and electronics (3) and a remote device (9), to measure the implant's function and degradation during its life span, wherein said sensors are electro not chemical sensors with electrodes (1). The prosthesis according to the invention may also be used to promote bone growth. The invention also relates to a method using the device of the invention.