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Hip replacement surgery (total hip arthroplasty) is one of the most successful procedures in modern medicine. It involves removing a damaged hip joint and replacing it with an artificial one (a prosthesis) to relieve chronic pain and restore mobility.

1. Why is it done?

The most common reason for a hip replacement is osteoarthritis, which wears down the protective cartilage in the joint until “bone-on-bone” contact occurs. Other reasons include:

  • Rheumatoid arthritis: An autoimmune disease causing joint inflammation.

     

  • Osteonecrosis: Bone death caused by a lack of blood supply (often after a fracture or dislocation).

     

  • Hip Fractures: Severe injuries that cannot be repaired with pins or plates.

     

  • Developmental Dysplasia: Hip joints that didn’t form correctly at birth.

     

2. How the Procedure Works

The surgery typically takes 60 to 90 minutes. Your surgeon will:

 

  1. Remove the “Ball”: The damaged head of the thighbone (femur) is removed.

     

  2. Prepare the “Socket”: The damaged surface of the hip socket (acetabulum) is hollowed out.

     

  3. Insert the Socket: A metal cup is placed into the socket. A liner (plastic, ceramic, or metal) is snapped inside to act as new “cartilage.”

     
     

  4. Insert the Stem: A metal stem is placed into the hollow center of the femur.

     

  5. Attach the new Ball: A ceramic or metal ball is placed on top of the stem to fit into the new socket.

     
Component Common Materials
Stem Titanium or Cobalt-chromium
Ball Ceramic or Cobalt-chromium
Liner Cross-linked Polyethylene (plastic) or Ceramic

3. Recovery and Results

Modern protocols prioritize “early mobilization.” Many patients are encouraged to stand or walk with a walker the same day as surgery.

 
 

  • Hospital Stay: Often 0–3 days; many procedures are now outpatient (same-day).

  • Short-term (3–6 weeks): You will likely use a walker or crutches and attend physical therapy.

     

  • Long-term (3 months+): Most patients return to normal activities like walking, swimming, and cycling.

     

  • Lifespan: A modern hip replacement is designed to last 20 to 25 years or more.

     

4. When to Consider Surgery

Orthopedic surgeons usually recommend surgery only after “conservative” treatments (physical therapy, weight loss, and injections) have failed. Signs you may be ready:

 

  • Pain that keeps you awake at night.

     

  • Difficulty with simple tasks like putting on socks or getting out of a car.

     

  • Pain that persists even while resting.

     

Note on Risks: While highly successful, risks include blood clots, infection, or a difference in leg length. Surgeons use blood thinners and antibiotics to minimize these

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