#prosthesis__prosthetic_device  corrective consisting of a replacement for a part of the body
  supertype:  corrective__restorative  a device for treating injury or disease
  subtype:  glass_eye__glasseye  prosthesis consisting of an artificial eye made of glass
  subtype:  implant  a prosthesis placed permanently in tissue
     subtype:  artificial_heart  a pump that replaces the natural heart
        subtype:  Jarvik_heart__Jarvik_artificial_heart  a kind of artificial heart that has been used with some success
     subtype:  artificial_joint  an metal or plastic part that is surgically implanted to replace a natural joint (possibly elbow or wrist but usually hip or knee)
     subtype:  breast_implant  an implant for cosmetic purposes to replace a breast that has been surgically removed
     subtype:  dental_implant  an implant that replaces a natural tooth
     subtype:  heart_valve  an implant that replaces a natural heart valve
     subtype:  lens_implant  a clear plastic lens implanted in the eye; usually done when the natural lens has been removed in a cataract operation
     subtype:  penile_implant  an implant that creates an artificial erection
     subtype:  shunt.implant  implant consisting of a tube made of plastic or rubber; for draining fluids within the body
  subtype:  obturator  a prosthesis used to close an opening (as to close an opening of the hard palate (usually in cases of cleft palate))
  subtype:  wooden_leg__peg__pegleg  a prosthesis that replaces a missing leg

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