The hip is one of the largest joints of the human body and is routinely exposed to enormous load. Basically, it is a round (ball-andsocket) joint, which is not perfectly spherical. It consists of a bony socket (acetabulum), covered in cartilage with a ring of cartilage around the edge (the acetabular labrum), a central ligament and the femoral head. The femoral head is also covered with cartilage.

All load-bearing, moving surfaces of the joint are very smooth so that during walking or running, cartilage glides on cartilage.

This seemingly simple structure allows the hip joint a very large range of motion, practically in every direction.

  1. Becken / Pelvis
  2. Joint Socket / Acetabulum
  3. Central Fat Pad / Fossa Acetabuli
  4. Femoral Head Ligament / LigamentumTeres
  5. Hip Ball / Femoral Head
  6. Joint Capsule (cross-section view)

Range of motion