Hip Joint

The hip joint is a ball-and-socket synovial joint formed between the os coxa (hip bone) and the femur. A round, cup-shaped structure on the os coxa, known as the acetabulum, forms the socket for the hip joint. The rounded head of the femur forms the ball of the joint.

The hip joint is one of the most important joints in the human body. It allows us to walk, run, and jump. It bears our body’s weight and the force of the strong muscles of the hip and leg. Yet the hip joint is also one of our most flexible joints and allows a greater range of motion than all other joints in the body except for the shoulder.

What are causes and risk factors for hip joint pain?

There are many causes of hip joint pain. Some hip pain is temporary, while other hip pain can be long-standing or chronic. Causes of hip pain include arthritis, inflammatory and noninflammatory arthritis, fracture, sprain, infectious arthritis (septic arthritis), avascular necrosis, Gaucher’s disease, sciatica, muscle strain, iliotibial band syndrome (IT band syndrome), and hematoma.

How do we diagnose hip joint pain?

We diagnose hip joint pain with a history and physical examination. Physical examination maneuvers, such as internally and externally rotating the hip, can be used to detect pain-aggravating positions. Tenderness can be elicited by palpating over inflamed areas. Straight leg raising can detect signs of sciatica. A health care professional may use imaging studies, including X-rays, CT scans, and MRI scans, to further define the causes of hip pain. Sometimes, nuclear medicine bone scans are used to image inflamed or fractured bone.

What are treatments and medications for hip joint pain?

The treatment of hip joint pain depends on the precise cause of the pain. Treatments can include rest, non-weight-bearing, cold application, and anti-inflammatory medications. For local inflammation, sometimes injection of cortisone medication (steroids) is used to quiet the inflammation. If infection is present, antibiotics are used. Fractures can require treatment with surgical repairs, including pinning, plates and screws, and total joint replacement. For severe arthritis, total joint replacement is performed when possible.