Assertion: implant's head | /r/HasProperty | ball
Facets:
Source sentences:
text: The femoral head (ball) fits on the end of the stem (trunnion).
text: The earliest recorded attempts at hip replacement were carried out in Germany in 1891 by Themistocles Gluck (1853–1942), who used ivory to replace the femoral head (the ball on the femur), attaching it with nickel-plated screws, plaster of Paris, and glue.
text: Bone is removed and the femur is shaped to accept the femoral stem with attached prosthetic femoral head (ball).
text: Partial hip replacement removes and replaces the patient’s femoral head, which is the ball at the top of the femur, or thighbone.