Implantable device having an internal electrode for stimulating growth of tissue

An implantable device with a body (12) suitable for its medical function and comprising biocompatible material, which body forms at least one interior cavity (16) that communicates through at least one opening (18) with the surroundings of the body so that tissue surrounding the implantable device can grow through the at least one opening;

• at least two electrodes (30, 32) within said body (12), which electrodes have terminals for supplying a low-frequency electrical alternating voltage and at least one (30) of which is located inside the cavity (16);
• characterized in that
• said at least one electrode (30) is located inside the cavity (16) in such a way that it is surrounded by the inner boundary of the cavity and spaced therefrom to define an interstice between said at least one electrode (30) and the inner boundary of the cavity, into which interstice said tissue can grow from outside inward through the at least one opening (18);
• and
• in that a source of said low frequency alternating voltage is provided, electrically coupled to the at least one electrode (30, 32).