The articulation between the head of the femur and the acetabulum form the hip joint.
The two tendons unite to form an arch over the acetabulum .
In this operation both the head of the femur and the acetabulum are replaced (total hip arthroplasty).
These muscles originate on a connective tissue layer that surrounds the arm musculature and extend down to converge on the sucker and insert on the outer connective tissue capsule of the acetabulum at the level of the sphincter muscle.
Thus, to describe the mechanism of attachment, we must describe both how pressure can be reduced in the acetabulum and how a seal can be formed with the surface of attachment.
There are moderate depressions in the lateral surfaces of the ilia posterior and dorsal to the acetabulum .
The acetabular labrum is a triangular fibrocartilage that is attached at its base to the rim of articular cartilage surrounding the perimeter of the acetabulum .
Treatment aims to contain the femoral head in the acetabulum to reduce the risks of future osteoarthritis.
The muscle volume has to go somewhere, so the circumference of the cup-shaped acetabulum has to increase, increasing the volume of the acetabular chamber.
The acetabulum is also the socket for the head of the femur.