Hip replacement stops the pain but does not reverse the bone damage

Hip replacement removes the damaged bone and cartilage in your hip joint and replaces them with an artificial joint. It relieves pain and restores movement. But it does not cure avascular necrosis — the condition that killed the bone in the first place. The dead bone stays dead. What changes is that you no longer have to use it.

Avascular necrosis (AVN) happens when blood stops flowing to part of your femoral head, the ball at the top of your thighbone. Without blood, that bone tissue dies. Over time, the dead bone collapses under your body weight, and the joint surface breaks down. Hip replacement works around this by removing the entire femoral head and replacing it with a metal or ceramic ball attached to a stem.

The surgery is effective at stopping pain and letting you walk, climb stairs, and sit normally again. But if you have AVN in your other hip, or if the condition develops elsewhere, replacement does not prevent that. You are treating the joint, not the disease.

Key Takeaways

  • Hip replacement removes the dead bone and damaged joint surface, which stops pain and restores function in that hip.
  • The surgery does not cure avascular necrosis or reverse the bone death that already happened.
  • If AVN develops in your other hip or elsewhere in your body, you will need separate treatment for that joint.
  • Your artificial hip joint typically lasts 15 to 20 years, after which revision surgery may be needed.
  • The underlying cause of your AVN — whether it was injury, steroid use, or something else — remains unchanged after replacement.

Why replacement works for pain but not for the disease itself

Pain in AVN comes from two sources: the dead bone itself can hurt as it breaks down, and the collapsed joint surface causes friction and inflammation. Hip replacement eliminates both by removing the damaged structures entirely. You get a new joint surface that moves smoothly, so the mechanical pain stops.

But the reason the bone died in the first place — whether that was a hip fracture that cut off blood supply, long-term steroid use, radiation therapy, or something unexplained — that cause is still present in your body. If the same risk factor is still active, it can damage other bones. For example, if steroid use caused your AVN, continuing steroids puts your other hip at risk. If you had a traumatic injury, that injury is over, but the scarring or vascular damage may affect other joints.

Replacement is a local fix. It solves the problem in one joint. It does not change your overall health or the disease process.

What happens to the artificial joint over time

An artificial hip joint is not permanent. The implant itself — the metal or ceramic ball and socket — can last 15 to 20 years or longer, depending on your age, activity level, and the type of implant used. Younger patients tend to wear out implants faster because they are more active.

After 15 to 20 years, the implant may loosen, the plastic liner may wear thin, or the bone around the implant may weaken. When that happens, you may need revision surgery to replace parts of the implant or the whole thing. Revision surgery is more complex than the first replacement because the surgeon has to remove the old implant and work with bone that has already been altered.

This does not mean replacement is a bad choice — for most people with advanced AVN, it is the best option available. But it is important to understand that you are not getting a permanent solution. You are getting pain relief and restored function for a defined period, after which you may need another surgery.

When replacement is the right choice for AVN

Hip replacement is typically recommended when AVN has progressed to stage 3 or 4 — meaning the bone has collapsed and the joint surface is damaged. At earlier stages, when the bone is still intact, other treatments may be tried first, such as core decompression (drilling into the bone to relieve pressure and encourage new blood vessel growth) or bone grafting.

But core decompression and grafting work only if the bone has not yet collapsed. Once collapse has happened, those procedures cannot restore the joint. Replacement becomes the most reliable way to stop pain and restore function.

Your surgeon will recommend replacement based on imaging (X-rays or MRI), your age, your activity level, and how much pain you are in. If you have severe pain that limits walking or sleep, and imaging shows advanced collapse, replacement is usually the next step.

What you need to know about your other hip

Between 20 and 50 percent of people with AVN in one hip develop it in the other hip within five years. This varies depending on the cause. If your AVN came from a specific injury to that hip, your other hip is at lower risk. If it came from steroids, radiation, or an underlying blood disorder, your other hip is at higher risk.

After you have a hip replacement, your surgeon will monitor your other hip with regular imaging. If AVN develops there, you will have options: you can wait and see if it progresses slowly, try core decompression if the bone has not yet collapsed, or have replacement surgery if it has. Having one hip replaced does not automatically mean you will need the other one replaced.

Talk to your surgeon about your specific risk based on what caused your AVN. If the cause is something ongoing — like continued steroid use for another condition — ask whether that can be reduced or stopped, because that may slow or prevent AVN in your other hip.

Living with an artificial hip after AVN

Most people return to normal daily activities within three to six months after hip replacement. You can walk without pain, climb stairs, sit in regular chairs, and sleep on your side again. Many people return to light exercise like swimming, walking, and golf.

There are some limits. High-impact activities like running, jumping, or contact sports can wear out the implant faster and are usually not recommended. Your surgeon will give you specific guidelines based on your implant type and your age.

You will need follow-up X-rays periodically to make sure the implant is stable and the bone around it is healthy. If you develop new pain in that hip years later, tell your surgeon right away — it could mean the implant is loosening or wearing, and early detection makes revision surgery simpler.

Frequently Asked Questions

Can hip replacement prevent AVN from developing in my other hip?

No. Replacement treats only the joint where it is done. If the underlying cause of your AVN is still present — such as steroid use or a blood disorder — your other hip remains at risk. Your surgeon will monitor it with imaging and discuss treatment options if AVN develops there.

Will I need another surgery on the same hip eventually?

Possibly. Most artificial hips last 15 to 20 years. After that, you may need revision surgery to replace worn parts or the entire implant. Younger, more active patients tend to need revision sooner. Your surgeon can discuss the expected lifespan of your specific implant.

What if I still have pain after hip replacement?

Some pain in the first few months after surgery is normal and usually improves with physical therapy. If pain persists beyond six months or returns years later, contact your surgeon. It could indicate implant loosening, infection, or another problem that needs imaging and evaluation.

Can I go back to sports or exercise after hip replacement?

You can return to low-impact activities like walking, swimming, and golf. High-impact activities like running and jumping are usually discouraged because they can wear out the implant faster. Your surgeon will give you specific guidelines based on your implant type and age.

Does the cause of my AVN matter after I have a replacement?

Yes. If your AVN was caused by something ongoing — like steroid use for another condition — that cause is still present and may affect other bones or joints. Talk to your doctor about whether the underlying cause can be managed differently to protect your remaining joints.