An implantable magnet that can freely turn in {HEAD ~ response} to an external magnetic field, thus avoiding torque and demagnetization on {TAIL ~ the implantable magnet} 
An implantable magnet that can freely turn in { HEAD ~ response } to an external magnetic field , thus avoiding torque and demagnetization on { TAIL ~ the implantable magnet }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL