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