Positional stabilization of tissue-implanted medical devices

A proto-device for implantation into soft tissue, the proto-device being selected from the group consisting of proto-microelectrode, proto-optical fiber, proto-polymer tube for drug delivery, proto-electrical lead, proto-encapsulated electronics, the proto-device comprising:

• an oblong device body having a proximal end, a distal end, and a central axis;
• biodegradable microfibers adhesively attached to the device body, wherein each of the microfibers is biodegradable in the soft tissue within a period selected from the group consisting of one week, two weeks, one month and two months from the implantation of the proto-device;
• a rigid matrix of biocompatible material having an outer face and the rigid matrix enclosing the device body and the microfibers;
• wherein the rigid matrix of biocompatible material is dissolvable and/or degradable in aqueous body fluid at a rate greater than the rate of microfiber degradation by a factor of 2 to at least 100;
• means for supporting permanent positional stabilization upon biodegradation of the microfiber, the means for supporting comprising the device body or the microfibers being attached to an outer face of the device body, wherein the means for supporting is selected from the group consisting of:
• a rugged surface of the device body, a knobby retainer optionally comprising a rugged surface attached to the device body, an eye, a loop or a bent section of the device body, wherein the bent section is bent away from the central axis by an angle of at least 15°.