Hip Replacement for AVN by Dr. Mayur Rabhadiya

Hip Replacement for AVN

Quick answer: Hip replacement for avascular necrosis (AVN) is generally considered when the femoral head has collapsed, secondary arthritis has developed, or pain and stiffness substantially limit walking, sleep and daily activity. AVN on an MRI does not automatically mean replacement is needed. The decision depends on structural damage, symptoms, examination findings and whether joint-preserving treatment remains realistic.

This page focuses specifically on replacement after collapse or failure of appropriate joint-preserving care. For diagnosis, MRI staging, early AVN and core decompression, read AVN hip treatment in Mumbai.

When AVN reaches the replacement stage

AVN begins as impaired blood supply within the femoral head. Before collapse, the joint surface may remain round and selected patients may still have preservation options. After subchondral fracture, flattening or collapse, the problem becomes mechanical: the ball is no longer round, loading becomes abnormal and secondary arthritis may develop.

Hip replacement becomes more relevant when imaging shows structural failure and the patient has meaningful disability. Typical factors include:

• Femoral-head collapse or flattening

• Secondary hip arthritis or joint-space loss

• Persistent groin pain during weight bearing

• Progressive limp, stiffness or reduced walking distance

• Night pain or pain affecting routine activity

• Failure of appropriate non-surgical care

• Progression after core decompression or another preservation procedure

Surgery should not be advised simply because a report mentions AVN. Symptoms, function and imaging must agree sufficiently to justify replacing the joint.

Assessment before hip replacement for AVN

Assessment confirms that the hip is the main pain source, establishes whether collapse is present and identifies factors that affect reconstruction and recovery.

Clinical examination

The examination considers gait, pain location, hip movement, fixed deformity, limb length, muscle strength, abductor function and functional limitations. The spine and knee may also need assessment because they can produce overlapping symptoms.

Imaging

A pelvis X-ray with both hips helps assess femoral-head shape, joint-space narrowing, acetabular involvement, deformity and bilateral disease. MRI is useful when the stage remains uncertain or the opposite hip may have earlier AVN. CT may be considered when bony collapse or anatomy requires further definition.

If the femoral head is still preserved, replacement may be premature. Return to the stage-based AVN treatment pathway.

What happens during hip replacement for AVN?

Hip replacement for AVN usually means total hip replacement. The damaged femoral head is removed, the socket is prepared, and an acetabular cup, liner, femoral stem and head are inserted to reconstruct the ball-and-socket joint.

The aim is to reduce pain and improve stable movement and walking. The operation cannot guarantee a pain-free hip, perfect leg length, unrestricted activity or lifelong implant survival.

Read the complete total hip replacement in Mumbai​ pathway for procedure, preparation and general recovery information.

Hip replacement for AVN in younger adults

AVN often affects adults younger than the usual population with age-related osteoarthritis. Younger age does not itself rule out replacement when the femoral head has collapsed and disability is substantial, but it makes counselling more important.

• Bone quality and femoral anatomy

• Implant fixation and bearing surface

• Work and activity expectations

• Possibility of future revision surgery

• Long-term follow-up

• Whether one or both hips are affected

No implant can be promised to last for a fixed number of years in every patient. Implant choice should be individualized rather than based only on age, price or marketing claims. Read about hip replacement in young adults.

Hip replacement after failed core decompression

Some hips progress despite appropriately selected core decompression. This does not necessarily mean the earlier treatment was performed incorrectly. Progression is influenced by AVN stage, lesion size and location, ongoing risk factors and the biology of the femoral head.

Replacement planning may require review of the previous surgical tract, bone quality, collapse pattern, limb length and retained implants. Repeating preservation procedures is unlikely to restore a severely collapsed and arthritic joint.

Bilateral AVN

Both hips should not automatically receive the same treatment. One hip may be collapsed and suitable for replacement while the opposite hip remains pre-collapse and may still be monitored or considered for preservation.

The sequence depends on pain, structural stage, walking capacity, medical fitness, home support and rehabilitation needs. Simultaneous or staged surgery should be decided individually.

Robotic planning for AVN hip replacement

Robotic assistance does not treat early AVN and cannot restore blood supply to the femoral head. Its role begins only after hip replacement has been selected.

In suitable patients, robotic planning may assist with three-dimensional assessment, cup size and position, offset, leg-length targets and execution of the planned component position. The surgeon controls planning, approach, bone preparation, implant selection and every operative step.

Robotics does not eliminate complications or guarantee recovery. Learn about robotic hip replacement in Mumbai.

Implant selection

There is no single best implant for every patient with AVN. Selection depends on age, bone quality, anatomy, activity, previous surgery, bilateral disease, instability risk and surgeon experience with the implant system.

Cementless fixation is often considered in younger patients when bone quality and anatomy are suitable, but it is not automatically preferable. Bearing and fixation choices should be individualized.

Recovery after hip replacement for AVN

Early recovery focuses on pain control, wound care, blood-clot prevention, safe assisted walking, muscle activation, fall prevention and progressive rehabilitation. Many medically stable patients begin mobilization early, but recovery speed varies.

Preoperative weakness, stiffness, bilateral disease, bone quality, surgical complexity, general health and rehabilitation can affect progress. Return to work and driving depends on functional recovery and activity demands, not a fixed calendar date.

Risks and limitations

Potential complications include infection, blood clots, dislocation, fracture, bleeding, wound problems, nerve or vessel injury, leg-length difference, persistent pain, limp, loosening, wear and future revision surgery. Medical conditions, steroid exposure, alcohol use, smoking, diabetes control, bone quality and body weight may influence risk.

Careful selection, medical optimization, surgical planning and rehabilitation reduce avoidable risk but cannot make risk zero.

When replacement may not yet be appropriate

Replacement may be premature when the femoral head is preserved, symptoms are mild, the pain source is uncertain, appropriate non-surgical care has not been assessed, or the patient is not medically ready for surgery.

If there is uncertainty, consider a hip replacement second opinion in Mumbai.

Book an AVN hip replacement consultation

Dr. Mayur Rabhadiya provides stage-based assessment for collapsed AVN, failed core decompression, bilateral disease and uncertainty about replacement. Bring current X-rays, MRI images and reports, previous procedure records and relevant medical documents.

Book an orthopedic consultation in Ghatkopar. Assessment determines whether replacement is appropriate and which plan is safest.

Medical review

Written and medically reviewed by Dr. Mayur Rabhadiya, MBBS, D’Ortho, DNB (Orthopedics), MNAMS (Orthopedics), FIJR (Robotic & Navigation), Orthopedic and Joint Replacement Surgeon, Mumbai.

Last medically reviewed: 10 September 2026. Maharashtra Medical Council registration: 2012072259.

This page provides general patient education and does not replace individual clinical assessment.