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