Hip Osteoarthritis (Coxarthrosis) – Causes and Treatment
Hip osteoarthritis (coxarthrosis) is a degenerative condition in which the cartilage of the hip joint gradually wears away, causing pain, stiffness, and reduced mobility.
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Hip osteoarthritis (coxarthrosis) is a degenerative condition in which the cartilage of the hip joint gradually wears away, causing pain, stiffness, and reduced mobility.
What is Hip Osteoarthritis?
Hip osteoarthritis, medically known as coxarthrosis, is a degenerative joint disease affecting the hip. It occurs when the protective cartilage covering the surfaces of the femoral head (ball) and the acetabulum (socket) gradually breaks down. Over time, this leads to bone-on-bone contact, resulting in pain, inflammation, and significant loss of mobility. Hip osteoarthritis is one of the most common joint conditions in adults and becomes increasingly prevalent with age.
Causes
Hip osteoarthritis is classified into two main types:
- Primary hip osteoarthritis: Develops without an identifiable underlying cause, typically as a result of natural age-related cartilage wear.
- Secondary hip osteoarthritis: Results from a pre-existing condition or injury that has damaged the hip joint.
Common risk factors and causes include:
- Advanced age
- Overweight and obesity (increased mechanical load on the joint)
- Congenital abnormalities such as hip dysplasia or femoroacetabular impingement (FAI)
- Previous hip injuries or fractures
- Avascular necrosis of the femoral head
- Inflammatory joint diseases such as rheumatoid arthritis
- Genetic predisposition
- Years of heavy physical labor or high-impact sports
Symptoms
Symptoms of hip osteoarthritis typically develop gradually and worsen over time. Common signs include:
- Hip pain, often felt in the groin, thigh, or buttock – initially during activity, later also at rest and at night
- Morning stiffness or start-up pain after periods of inactivity
- Reduced range of motion in the hip, especially with rotation and flexion
- Limping or altered gait pattern
- Muscle weakness around the hip and thigh
- Clicking, creaking, or grinding sensations in the joint
Diagnosis
The diagnosis of hip osteoarthritis is established through a combination of:
- Medical history and physical examination: The doctor assesses pain characteristics, duration, and location, and evaluates hip range of motion.
- X-ray imaging: The standard diagnostic method to assess joint space narrowing, bone spurs (osteophytes), and cartilage loss.
- MRI (Magnetic Resonance Imaging): Provides detailed visualization of cartilage, soft tissues, and early-stage changes.
- Blood tests: To rule out inflammatory or rheumatic causes.
Treatment
Conservative Treatment
In early to moderate stages, non-surgical approaches are the first line of management:
- Physiotherapy and exercise: Targeted exercises to strengthen hip muscles and improve joint mobility
- Weight management: Reducing excess body weight decreases joint stress and slows disease progression
- Pain medication: Non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or diclofenac help relieve pain and inflammation
- Joint injections: Corticosteroid or hyaluronic acid injections may provide temporary relief
- Assistive devices: Walking aids, orthopedic insoles, or shoe modifications to offload the joint
- Heat and cold therapy: For pain relief and muscle relaxation
Surgical Treatment
When conservative measures are no longer sufficient, surgical intervention may be considered:
- Total hip replacement (Total Hip Arthroplasty, THA): The worn hip joint is replaced with an artificial implant. This is the most common and effective surgical treatment for advanced hip osteoarthritis.
- Joint-preserving procedures: In younger patients, cartilage-preserving or bone-correcting surgeries (e.g., osteotomy) may be appropriate in selected cases.
Prevention and Prognosis
A full reversal of hip osteoarthritis is not currently possible, as damaged cartilage does not regenerate. The goals of treatment are to relieve pain, maintain mobility, and improve quality of life. Regular low-impact exercise (e.g., swimming, cycling), maintaining a healthy body weight, and avoiding excessive joint stress can help slow the progression of the disease.
References
- World Health Organization (WHO): Musculoskeletal conditions – Osteoarthritis. Fact Sheet, 2023. Available at: https://www.who.int/news-room/fact-sheets/detail/osteoarthritis
- Bijlsma JWJ, Berenbaum F, Lafeber FPJG: Osteoarthritis: an update with relevance for clinical practice. The Lancet, 2011; 377(9783): 2115–2126.
- National Institute for Health and Care Excellence (NICE): Osteoarthritis: care and management. Clinical guideline CG177, 2022. Available at: https://www.nice.org.uk/guidance/cg177
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