Like the shoulder joint, the hip joint(articulatio coxae) is a ball-and-socket joint. It allows the leg to move in all directions. The hip joint is involved in many phases of movement and has a heavy load to carry. For this reason, signs of wear and tear are particularly common.
The hip joint is basically made up of two parts: The acetabulum and the femoral head.
The hip socket(acetabulum) is a curved area on the pelvic bone. It consists of three bones that have grown together in adults:
- The ilium (Os ilium),
- pubic bone(os pubis) and
- ischium(os ischii).
The anatomy of the hip © bilderzwerg | AdobeStock
A fibrocartilaginous ring on the edge of the acetabulum is responsible for its depression.
In healthy people, a thick layer of cartilage (hyaline cartilage) covers the acetabulum and the femoral head. This cartilage layer protects the joint surfaces and enables sliding movements. The relatively wide joint capsule surrounds the joint. Very strong ligaments provide further stabilization.
The upper part of the femur is shaped like a spherical head(caput femoris). The head of the femur rests in the hip socket. There it can rotate in various directions.
The hip joint is moved by muscles and tendons.
The most common disease affecting the hip joint is hip osteoarthritis (coxarthrosis). This refers to wear and tear of the hip joint cartilage. If the cartilage wear is so advanced that the bones rub against each other, walking can become very painful.
If other treatment options have been exhausted, an artificial hip joint (hip prosthesis) can help. It replaces the natural joint and enables a life without hip pain.
Also
- Deformities of the hip joint such as hip dysplasia (flattened acetabular roof) and
- bone fractures(fractures) in this area
occur frequently. The most common fracture of the femur is the femoral neck fracture (femoral neck fracture). A fracture of the pelvic bone (acetabular fracture) is also possible.