THE HIP SOCKET
The hip socket or ‘acetabulum’, in full: acetabulum ossis ilium, is the cup-shaped joint cavity of the pelvis. The femoral head hinges in this joint cavity. The acetabulum is formed from three hip bones: the os ilium (ilium), the os ischii (ischium) and the os pubis (pubis).
Etymologically, the name acetabulum is derived from the Latin words acetum and bulla, meaning vinegar and barrel respectively. The hip socket is said to resemble a small vinegar jar, such as used by the Romans.
In certain hip diseases, such as arthrosis, the femoral head can no longer move freely in the acetabulum, because the cartilage is damaged and malformations have occurred. This causes pain and makes walking difficult, which seriously inhibits the quality of life.