The Femoral Head fits into the acetabulum and allows it to move freely.
Not exact matches
So does its
femoral head, the rounded end of the leg bone that
fits into the pelvis.
The top of the femur (called the
femoral head) neatly
fits into the pelvic socket (acetabulum), and is held in place by ligaments.
In other words, the instability created by weak supportive ligaments keeps the body from being able to manufacture a deep, smooth hip socket for the ball to
fit snuggly into, resulting in the flattening of the acetabulum (hip socket) and a squaring of the
femoral head (the ball).
Working with veterinarians skilled in reading the subtleties of X-ray images, the Hip Dysplasia Registry of the Orthopedic Foundation for Animals at the University of Missouri in Columbia, Missouri, assigns nine variations of congruity and
fit between the
femoral head (top of the thigh bone) and the acetabulum (hollow area in the pelvic bone into which the thigh bone
fits):
Three - Plane Intertrochanteric Osteotomy: Portions of the
femoral head are cut in order to change the angle at which it
fits into the acetabulum.
An excellent hip joint involves a
femoral head (ball) that
fits closely and tightly against the acetabulum (socket).
BOP Shelf Arthroplasty: The acetabulum is surgically remodeled to better
fit the
femoral head.
In most cases of canine hip dysplasia, the acetabulum is rather shallow or not deep enough to allow for the more secure
fit of the
femoral head.
In this surgery the ill -
fitting acetabulum is essentially sawed free of the rest of the pelvis, re-positioned for a tighter
fit on the
femoral head, and then plated back into place.
As I mentioned, the ball of the femur is called the
femoral head and the socket of the pelvis into which it
fits is called the acetabulum.