The hip is the supporting joint connecting the pelvis and the femur (thighbone). The joint moves easily when all of these parts are healthy. It is covered with tissue and held together by large muscles.
The femur head is a sphere 45mm in diameter. Bone surfaces of the femoral head and the pelvis’s acetabular cavity are covered with cartilage, a soft layer of tissue that enables sliding and movement.
Healthy cartilage absorbs tension and allows for the femoral head to slide into its cavity.
In hip pathology, osteoarthrosis occurs when this cartilage and its subjacent bone lose their sliding properties.
The hip allows for homogeneous distribution of forces and a broader range of movement.