Oliver Bee RMTRegistered Massage Therapist

Massage therapy · Kitchener–WaterlooOsteonecrosis of the Hip

Hip & Thigh

What It Is

Osteonecrosis of the hip is when bone tissue dies because its blood supply has been disrupted (National Institute of Arthritis and Musculoskeletal and Skin Diseases, n.d.a). "Osteo" means bone, and "necrosis" means cell death. Osteonecrosis is also called avascular necrosis (American Academy of Orthopaedic Surgeons, n.d.). In the hip, it affects the ball of the joint (the femoral head). Without enough blood, the bone dies and gradually collapses, and the cartilage covering the joint can then collapse too, leading to arthritis (American Academy of Orthopaedic Surgeons, n.d.).

The blood supply to the bone can be interrupted if the bone is broken (fractured) or the joint is dislocated (National Institute of Arthritis and Musculoskeletal and Skin Diseases, n.d.a). Osteonecrosis of the hip is also linked to long-term use of high-dose steroid medicines and to drinking too much alcohol (National Institute of Arthritis and Musculoskeletal and Skin Diseases, n.d.a). Arthritis is usually a result of osteonecrosis of the hip, rather than its cause (American Academy of Orthopaedic Surgeons, n.d.). Some people who develop the condition have no known risk factors (National Institute of Arthritis and Musculoskeletal and Skin Diseases, n.d.a).

The hip is the joint most commonly affected (National Institute of Arthritis and Musculoskeletal and Skin Diseases, n.d.a). Even though the condition can happen to anyone, it is more common in people aged between 40 and 65, and men develop it more often than women (American Academy of Orthopaedic Surgeons, n.d.).

Hip Anatomy

The hip is a ball and socket joint connecting the thigh bone (femur) to the pelvis. The ball is the femoral head, which is the upper end of the femur, and the socket (acetabulum) is part of the pelvis. The surfaces of the ball and socket are covered with smooth, slippery cartilage that lets the bones glide easily against each other (American Academy of Orthopaedic Surgeons, n.d.).

Bone cells need a steady blood supply to stay healthy. Injuries such as hip dislocations and hip fractures can damage the blood vessels that supply the femoral head (American Academy of Orthopaedic Surgeons, n.d.).

The main symptom is pain, usually felt in the groin or, less often, in the buttock. At first it usually hurts when you put weight on the hip, but later the hip may hurt even when you are resting (National Institute of Arthritis and Musculoskeletal and Skin Diseases, n.d.a).

It is not possible to diagnose osteonecrosis of the hip from a hip examination or your medical history alone; imaging is needed. X-rays are usually taken first and help rule out other causes of hip pain, such as a fracture or arthritis. An MRI scan can pick up early changes before they show on an X-ray (National Institute of Arthritis and Musculoskeletal and Skin Diseases, n.d.b).

How to Treat Osteonecrosis of the Hip:

Certain types of exercise can help you improve or maintain the range of movement in the joint, and physical therapy can help to reduce stiffness and increase the hip's range of movement (National Institute of Arthritis and Musculoskeletal and Skin Diseases, n.d.b). I can choose exercises suited to your hip, teach you how to do them, and use gentle hands-on work to ease stiffness, within your medical team's plan. See the My Approach tab for how I work.

Non-surgical treatments can help to manage the symptoms, but they do not cure the condition, and most people eventually need surgery. Early diagnosis gives treatment a better chance of success (National Institute of Arthritis and Musculoskeletal and Skin Diseases, n.d.b).

1. Rest from Painful Activities

Reducing the amount of stress and weight on the affected hip can help to relieve pain, and you might need to limit some of your usual activities (American Academy of Orthopaedic Surgeons, n.d.). Your doctor may recommend crutches or a cane to take weight off the hip when you walk (National Institute of Arthritis and Musculoskeletal and Skin Diseases, n.d.b). Talk to your doctor about which exercises are best for you, and whether you should avoid certain activities (National Institute of Arthritis and Musculoskeletal and Skin Diseases, n.d.b).

2. Medication

The American Academy of Orthopaedic Surgeons and the National Institute of Arthritis and Musculoskeletal and Skin Diseases say anti-inflammatory medicines may help to relieve the pain and swelling of this condition (American Academy of Orthopaedic Surgeons, n.d.; National Institute of Arthritis and Musculoskeletal and Skin Diseases, n.d.b). (This medicine information comes from the American Academy of Orthopaedic Surgeons and the National Institute of Arthritis and Musculoskeletal and Skin Diseases, not from me. Always check with a pharmacist or your family doctor or nurse practitioner before taking any medicine.)

Not a diagnosis — for more information, contact me or another trusted healthcare provider.

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