Hip Resurfacing

Hip resurfacing is a type of hip arthroplasty that preserves most of the natural femoral head and neck. Instead of cutting off the entire femoral head and inserting a conventional stem down the femur, the surgeon reshapes the damaged femoral head and covers it with a hollow metal cap. The damaged acetabular cartilage is removed and replaced with a metal socket.

The result is still an artificial bearing surface, but the femoral reconstruction is fundamentally different from conventional total hip replacement. Most of the upper femur remains intact, including the femoral neck and much of the femoral head.

This bone-preserving concept is particularly attractive for younger adults who may potentially require another hip operation decades later. Preserving the femoral canal can make certain future revision strategies more straightforward on the femoral side.

However, bone preservation comes with specific trade-offs. The remaining femoral head and neck must be strong enough to support the cap. A fracture can occur through the preserved femoral neck, and the metal-on-metal bearing used by established resurfacing systems can release cobalt and chromium particles and ions.

What Does Resurfacing of the Hip Mean?

The phrase resurfacing of the hip describes removing only the damaged surface of the joint rather than replacing the entire femoral head.

On the femoral side, the surgeon does not cut through the neck in the same way as during total hip replacement. Instead, the head is shaped into a cylindrical and rounded form that can accept a precisely sized metal cap.

On the pelvic side, resurfacing is more similar to total hip arthroplasty. The damaged acetabular cartilage is removed and a metal cup is implanted.

For this reason, it would be inaccurate to describe hip resurfacing as simply putting a cap over an otherwise untouched joint. The acetabulum is reconstructed and the operation remains major joint surgery.

What Is the Difference Between Hip Resurfacing and Total Hip Replacement?

The most important difference is what happens to the upper femur.

During conventional total hip replacement, the surgeon removes the natural femoral head and neck. A stem is inserted down the femoral canal, and an artificial ball is attached to that stem.

During hip resurfacing surgery, most of the femoral head and the entire femoral neck are preserved. A relatively short central peg extends into the femoral head, but there is no conventional long femoral stem.

Both procedures replace the damaged acetabular surface.

Total hip replacement offers many different bearing combinations, including ceramic-on-polyethylene and ceramic-on-ceramic configurations. Established hip resurfacing systems use a large-diameter metal femoral cap articulating against a metal acetabular component.

Why Preserve the Femoral Head?

Preserving the femoral head and neck leaves more bone available if future surgery becomes necessary.

This can be relevant to a patient receiving arthroplasty at 40 or 50 years of age because the implant may need to function for several decades.

If a resurfacing subsequently fails on the femoral side, conversion to a stemmed total hip replacement can sometimes resemble a primary femoral reconstruction because the femoral canal has not previously contained a standard stem.

This does not mean revision is always simple. Acetabular revision, metal-related tissue damage, infection or major bone loss can still make conversion complex.

Bone preservation should therefore be viewed as one potential advantage rather than a guarantee of an easy future revision.

Why Is the Femoral Head Size Important?

Hip resurfacing uses a femoral component that closely approximates the patient's natural femoral-head diameter.

This creates a relatively large articulation compared with many traditional total hip replacement designs.

A large head can provide a greater distance before the prosthetic joint dislocates.

This contributes to the historically low rates of conventional hip dislocation reported with successful resurfacing.

However, component size is also important to metal-bearing performance. Smaller resurfacing components have historically been associated with greater wear and less favorable outcomes in several datasets.

Patient anatomy therefore directly affects whether resurfacing is an attractive option.

What Is Birmingham Hip Resurfacing?

Birmingham Hip Resurfacing, commonly abbreviated BHR, is a metal-on-metal hip resurfacing system developed in Birmingham, England and introduced clinically in the late 1990s.

The system consists of a cobalt-chromium resurfacing component that covers the patient's prepared femoral head and a cobalt-chromium acetabular component.

The BHR femoral component is designed for cemented fixation, while the acetabular shell is designed for cementless press-fit fixation.

The Birmingham system became the most extensively studied modern resurfacing design and has accumulated long-term outcome data extending beyond two decades.

It is important not to assume that results achieved with BHR automatically apply to every historical metal-on-metal resurfacing implant. Implant design has proved extremely important in this field.

What Is Birmingham Hip Joint Resurfacing?

The phrase Birmingham hip joint resurfacing is simply another way patients refer to Birmingham Hip Resurfacing.

The operation follows the same basic resurfacing principles: the diseased femoral head is reshaped and capped while the acetabulum receives the matching resurfacing shell.

The Birmingham name refers to the specific implant system, not a separate anatomical operation.

Patients comparing treatment options should ask for the exact implant system because “hip resurfacing” describes a category of surgery rather than one universal prosthesis.

Is Birmingham Hip Resurfacing Still Used?

Yes, BHR continues to be used in selected patients in centers with appropriate experience.

In the United States, the FDA continues to provide specific information for metal-on-metal resurfacing patients and notes that metal-on-metal hip resurfacing systems remain available, while metal-on-metal total hip replacement systems are no longer FDA-approved for marketing in the country.

This distinction is important. The major problems encountered with historical large-head metal-on-metal total hip replacements should not automatically be treated as identical to the performance of a well-designed resurfacing system in an appropriately selected patient.

Nevertheless, resurfacing still uses a metal-on-metal bearing and therefore requires serious consideration of cobalt and chromium exposure.

Why Was Hip Resurfacing Developed?

Young, physically active adults have historically presented a challenge for hip replacement.

Traditional implants were highly successful at relieving arthritis pain, but younger patients were expected to place more cumulative mechanical demand on them over a longer lifetime.

Resurfacing attempted to preserve bone, maintain more natural proximal femoral anatomy and provide a large stable bearing that could accommodate active lifestyles.

The concept was particularly appealing when older polyethylene bearings had higher wear rates than modern materials.

Modern total hip replacement has improved greatly since then. Highly cross-linked polyethylene, ceramic heads, improved stem designs and better surgical techniques have reduced some of the historical reasons that originally made resurfacing especially attractive.

Is Hip Resurfacing a Partial Hip Replacement?

Not in the same sense as hemiarthroplasty.

A hemiarthroplasty replaces only the femoral side while leaving the natural acetabulum.

Hip resurfacing reconstructs both articulating surfaces. The femoral side receives a cap and the acetabulum receives an artificial socket.

It is therefore closer conceptually to total hip arthroplasty than to partial hip replacement, even though the natural femoral head remains beneath the resurfacing component.

What Conditions Can Hip Resurfacing Treat?

End-stage hip osteoarthritis is the most common indication.

Patients generally have substantial cartilage loss, pain and reduced function despite appropriate nonsurgical treatment.

Resurfacing has also been performed in selected cases of post-traumatic arthritis, developmental hip abnormalities, inflammatory disease and osteonecrosis.

However, the condition of the femoral head becomes particularly important because resurfacing depends on keeping that bone.

Extensive avascular necrosis, major cysts or weak bone can undermine femoral support and make a conventional stemmed total hip replacement more appropriate.

Hip Osteoarthritis

Osteoarthritis gradually destroys the cartilage covering the femoral head and acetabulum.

The patient develops groin pain, stiffness and progressive loss of mobility.

Activities such as putting on shoes, getting into a car and walking longer distances can become difficult.

When symptoms remain severe despite nonsurgical treatment, arthroplasty becomes an option.

In a younger active patient with strong bone, resurfacing can be discussed alongside total hip replacement rather than assumed to be the preferred procedure.

Osteonecrosis and Hip Resurfacing

Osteonecrosis is more complicated because the underlying problem affects the femoral head itself.

Small, carefully selected areas of involvement may still permit resurfacing in some circumstances.

Extensive necrosis weakens the bone that must support the femoral cap.

The FDA labeling for BHR specifically lists osteonecrosis involving more than half of the femoral head as inadequate bone stock for that device.

This illustrates why a procedure that preserves the femoral head also depends critically on the biological quality of that head.

Hip Dysplasia

Developmental dysplasia alters the anatomy of the femoral head, neck and acetabulum.

Mild deformity can sometimes be treated successfully with resurfacing in selected patients.

More severe dysplasia can create challenges with cup fixation, femoral orientation and component size.

Small components are particularly relevant because resurfacing outcomes have historically been less favorable with smaller head sizes.

The surgeon therefore evaluates the specific three-dimensional anatomy rather than treating all dysplasia patients the same.

Inflammatory Arthritis

Resurfacing has been used for inflammatory arthritis, and the BHR labeling includes inflammatory disease among its possible indications.

In modern practice, however, selection remains cautious.

Inflammatory disease, chronic corticosteroid use and poor bone quality can reduce the attractiveness of preserving the femoral head.

Modern medical treatment has also changed the natural history of many inflammatory disorders.

Total hip replacement remains more commonly used across a broad inflammatory-arthritis population.

Why Is Hip Resurfacing Not Popular?

The search question “why is hip resurfacing not popular?” has an important historical answer.

During the 2000s, metal-on-metal hip implants became widely used. Several devices subsequently developed unexpectedly high failure rates. Concerns emerged regarding cobalt and chromium wear debris, adverse local tissue reactions, pseudotumors and damage to surrounding muscles and bone.

Some poorly performing systems were withdrawn or recalled.

As confidence in metal-on-metal bearings fell, hip resurfacing use declined dramatically.

At the same time, conventional total hip replacement became even more successful because of improved polyethylene, ceramic heads, better implant fixation and more sophisticated surgical techniques.

Resurfacing therefore became a niche operation rather than a routine alternative for all younger patients.

Was Every Hip Resurfacing Implant Bad?

No.

One of the most important lessons from the metal-on-metal era is that implant designs did not perform equally.

The Birmingham Hip Resurfacing system has considerably stronger long-term data than several discontinued resurfacing designs.

Recent systematic reviews continue to report favorable long-term survivorship for BHR in appropriately selected patients, while also confirming metal-debris reactions and other resurfacing-specific causes of failure.

For patient education, it is therefore inaccurate to say either “all metal-on-metal resurfacing is unsafe” or “all resurfacing is excellent.”

The specific device, patient and surgeon matter.

Metal-on-Metal Bearings

In a metal-on-metal resurfacing hip, the cobalt-chromium femoral cap moves against the cobalt-chromium acetabular component.

Mechanical contact inevitably produces a small amount of material wear.

Microscopic particles can remain around the hip and metal ions can enter the bloodstream.

Some patients tolerate these levels without clinical problems.

Others can develop an adverse local tissue response even at levels that might not seem dramatically elevated.

This variable biological response is one reason monitoring cannot rely on a single blood metal-ion threshold.

Cobalt and Chromium Ions

Cobalt and chromium are components of the alloys used in established metal-on-metal resurfacing systems.

Blood levels can be measured when clinically indicated.

An elevated result can support further investigation, particularly when symptoms or imaging raise concern.

However, a number by itself does not determine whether a resurfacing hip must be revised.

A patient can have a relatively high measurement and few symptoms, while another can develop significant tissue reaction with a lower result.

Clinical assessment, serial trends and imaging are therefore considered together.

Adverse Reaction to Metal Debris

Adverse reaction to metal debris, often abbreviated ARMD, describes abnormal tissue responses associated with metal wear products.

The tissues around the hip can become inflamed.

Fluid collections, tissue necrosis or pseudotumor-like masses can occur.

The hip abductors can be damaged in severe cases.

Patients can present with pain, swelling, weakness, clicking or declining walking ability.

These complications explain why continued follow-up is important for metal-on-metal resurfacing patients even many years after surgery.

What Is a Pseudotumor?

A pseudotumor is not a cancer.

It is an abnormal inflammatory mass or fluid-containing lesion that can develop around some metal-on-metal hip implants.

It can damage surrounding muscles and other soft tissues if severe.

MRI using metal-artifact-reduction sequences or ultrasound can help evaluate the tissues.

The finding does not automatically require revision in every patient, but clinically significant lesions require specialist assessment.

Why Is Hip Resurfacing Still Offered?

Despite these concerns, resurfacing retains characteristics that can be attractive for a very specific patient population.

The femoral head and neck are preserved.

The large articulation provides excellent inherent stability.

Well-selected active patients can achieve high activity levels.

Long-term BHR studies continue to show strong survivorship in selected groups, particularly men with appropriate anatomy.

The operation therefore survives not because metal-related concerns disappeared, but because the risk-benefit balance can still be favorable for carefully selected patients.

Confirming the Diagnosis

The first step is confirming that advanced hip disease is responsible for the patient's symptoms.

Pain from osteoarthritis commonly concentrates in the groin and anterior thigh.

The hip becomes stiff, especially during internal rotation and flexion.

Patients may struggle with footwear, stairs and getting into a car.

Pain at night or at rest can develop as disease becomes more advanced.

The decision for surgery should be based on symptoms, function and imaging rather than the X-ray alone.

Nonsurgical Treatment

Most patients try appropriate nonsurgical management before arthroplasty.

Exercise and physiotherapy can improve strength and movement.

Activity modification can reduce aggravating loading.

Medication can help control pain where medically appropriate.

Weight optimization can reduce mechanical stress.

A cane can improve walking.

Selected patients may receive image-guided corticosteroid injection for temporary symptom relief.

Once quality of life remains substantially affected despite reasonable treatment, surgery can be discussed.

Comparing Resurfacing With Total Hip Replacement

Patients considering resurfacing should also be offered a realistic discussion of conventional total hip replacement.

This is essential because modern THA has improved dramatically.

A ceramic or metal head articulating against highly cross-linked polyethylene can provide excellent longevity without a metal-on-metal articulation.

The decision is therefore no longer a comparison between resurfacing and the total hip replacements of several decades ago.

It is a comparison with modern contemporary THA.

Medical History

The surgeon reviews kidney disease, heart and lung conditions, diabetes, inflammatory disorders and medications.

Metal allergies or previous implant reactions should be discussed.

The patient's occupation and sports goals are also important because activity level influences the perceived benefits of resurfacing.

A younger age alone is not enough to establish candidacy.

The surgeon needs to understand why resurfacing offers a meaningful advantage for this particular person.

Physical Examination

Hip range of motion, gait and muscle strength are assessed.

The surgeon evaluates leg length and the condition of the opposite hip.

Abductor strength is important for postoperative function.

Lumbar-spine symptoms also need attention because back disease can mimic or contribute to hip pain.

The goal is to avoid replacing a joint when the primary source of symptoms lies elsewhere.

X-Rays

Pelvic and hip X-rays confirm arthritis and provide information about femoral and acetabular anatomy.

The surgeon assesses femoral-head size, neck geometry, dysplasia, bone quality and cysts.

Component sizing can be estimated.

Subtle anatomical differences matter because resurfacing components must be positioned accurately on both the femoral and acetabular sides.

CT Imaging

CT is not required for every routine resurfacing patient.

It can be useful for complex deformity, previous surgery or detailed evaluation of acetabular anatomy.

Three-dimensional imaging can help when the surgeon is concerned about component orientation or available bone.

Robotic and navigation systems can also require additional imaging depending on the platform.

Technology should support patient selection and planning rather than replace clinical judgment.

MRI

MRI can be useful before surgery when there is concern about osteonecrosis or another femoral-head abnormality not completely characterized on X-ray.

It can demonstrate the extent of necrotic bone.

This is especially relevant to resurfacing because the femoral head must remain biologically and mechanically viable.

MRI is not required routinely for straightforward end-stage osteoarthritis.

Bone Density

DEXA scanning may be appropriate when the patient's bone quality is uncertain.

Risk factors include older age, previous fragility fracture, long-term corticosteroid exposure and conditions associated with osteoporosis.

A resurfacing implant depends on the preserved femoral neck remaining strong.

For that reason, bone-density assessment can directly influence the choice between resurfacing and conventional total hip replacement.

Kidney Function

Kidney function deserves particular attention before metal-on-metal resurfacing.

Blood tests can include creatinine and estimated glomerular filtration rate.

A patient with meaningful renal impairment may not be an appropriate candidate because systemic metal ions are partly cleared through the kidneys.

BHR labeling also recommends attention to renal function in patients with medications or conditions that could increase future renal impairment.

Metal Allergy History

Patients should mention significant reactions to jewelry, watches, belt buckles or previous metal implants.

Skin allergy and deep-tissue implant reaction are not identical phenomena, and testing cannot perfectly predict outcome.

Nevertheless, a meaningful history can influence implant choice.

A conventional non-metal-on-metal total hip replacement generally offers a simpler way to avoid the unique bearing concern.

Medication Review

Anticoagulants, antiplatelet medication and some supplements can influence bleeding.

Diabetes medication requires perioperative planning.

Immunosuppressive therapy can affect infection risk and healing.

Patients should never stop important medication without instructions from the medical team.

The aim is to reduce avoidable risk while maintaining control of chronic medical conditions.

Smoking

Smoking increases risks related to wound healing and infection.

It can also negatively affect bone health.

Stopping nicotine before surgery is strongly encouraged.

Because hip resurfacing deliberately preserves femoral bone that must remain healthy, optimization of bone biology is particularly relevant.

Weight Management

Weight optimization can improve mobility and reduce perioperative risk.

It can also reduce mechanical load on the reconstructed hip.

However, treatment should be individualized.

A patient with severe arthritis may be physically unable to achieve dramatic weight loss through exercise.

The purpose of preoperative optimization is to improve safety, not to create impossible barriers to care.

Prehabilitation

Strengthening the upper body and lower limbs before surgery can make early transfers and crutch use easier.

Patients can learn walking-aid technique before admission.

Education about the recovery pathway is equally valuable.

A young athlete may need more counseling than an older low-demand patient because enthusiasm can lead to excessive loading before the femoral neck and surrounding tissues have adequately adapted.

Understanding Metal-on-Metal Follow-Up

Patients should know before surgery that resurfacing creates a lifelong metal-on-metal implant.

Follow-up does not stop simply because the incision has healed.

The FDA recommends periodic clinical follow-up for metal-on-metal implant patients and closer monitoring for higher-risk individuals.

This long-term surveillance requirement should be considered part of the operation rather than an unexpected issue that appears years later.

Choosing the Surgeon

Hip resurfacing is technically demanding and highly dependent on patient selection and component positioning.

A surgeon should perform the procedure regularly enough to understand its specific nuances.

Patients should ask what proportion of the surgeon's hip practice involves resurfacing, which implant is used and how outcomes are monitored.

A surgeon who performs excellent total hip replacement but only occasional resurfacing is not automatically the ideal resurfacing surgeon.

Choosing the Implant

The exact resurfacing system matters.

Long-term results from Birmingham Hip Resurfacing should not be generalized to another implant without supporting evidence.

Patients should ask for the manufacturer and exact model.

The implant should also be approved or legally available in the country where surgery is performed.

Orthopedic Abroad should record the device name in partner-clinic quotations whenever possible.

Hip resurfacing surgery preserves the femoral head and neck, reshapes the damaged femoral head to accept a metal cap and replaces the damaged acetabulum with a matching metal cup.

The operation begins under general or spinal anaesthesia.

The surgeon exposes the hip and dislocates the femoral head from the acetabulum.

The acetabulum is prepared and the metal cup is inserted.

The femoral head is then carefully shaped using specialized guides and cutting instruments.

A central channel is created for the short peg of the resurfacing component.

The metal femoral cap is fixed over the prepared bone, typically with bone cement in systems such as the Birmingham Hip Resurfacing.

The joint is reduced and stability is assessed before the wound is closed.

Surgical Approach

Different approaches can be used, but posterior approaches have historically been common for resurfacing because they provide broad exposure of the femoral head and acetabulum.

Other approaches have also been described.

The operation requires sufficient access to position the cup accurately and prepare the entire femoral head without damaging the femoral neck.

The choice of approach should reflect surgeon expertise rather than a marketing claim about incision size.

Protecting Femoral-Head Blood Supply

The remaining femoral head must remain biologically viable.

Surgical exposure can affect the vessels that contribute to its blood supply.

Experienced resurfacing technique aims to minimize unnecessary vascular disruption.

This consideration is less important during conventional THA because the femoral head is removed entirely.

Preserving bone therefore creates an additional technical responsibility.

Hip Dislocation During Surgery

The natural hip is temporarily dislocated so the surgeon can access the joint surfaces.

The femoral head is moved away from the acetabulum.

This provides access for acetabular preparation.

Although the final resurfacing has a very large articulation and strong inherent stability, the surrounding soft tissues still require healing after the surgical exposure.

Acetabular Preparation

The damaged cartilage and a controlled amount of acetabular bone are removed using hemispherical reamers.

The surgeon progressively enlarges the socket until the appropriate size and orientation are achieved.

This portion of the procedure resembles total hip replacement.

A press-fit metal acetabular component is then inserted.

Secure initial fixation is essential because the cup must remain stable while bone grows onto or into its outer surface.

Cup Position

Cup position is especially important in metal-on-metal resurfacing.

Excessively steep or otherwise poorly oriented components can increase edge loading.

This can increase metal wear.

The surgeon therefore pays careful attention to inclination and anteversion.

The FDA specifically warns that suboptimal component placement can increase wear and early failure.

This is one reason resurfacing should not be viewed simply as putting a cap onto the femoral head.

Accurate three-dimensional reconstruction matters.

Preparing the Femoral Head

The femoral head remains attached to the neck.

Special guides establish the axis of the resurfacing component.

The surgeon then removes a thin layer of bone from the outer head and shapes it to fit inside the hollow metal cap.

Precision is essential.

Removing too much bone weakens the head.

Incorrect orientation can create abnormal loading.

Avoiding Femoral-Neck Notching

The junction between the femoral head and neck must be protected.

If instruments accidentally cut into the superior femoral neck, a stress concentration can develop.

This is known as notching.

Notching increases the risk of postoperative femoral-neck fracture.

BHR device instructions explicitly warn against femoral-neck notching and against varus positioning of the femoral component because both can contribute to fracture.

Femoral Component Position

The central peg is aligned with the femoral neck.

The surgeon generally avoids excessive varus positioning.

Appropriate orientation distributes forces through the remaining bone.

The implant should also avoid unnecessary overhang or malposition.

Small technical errors can matter because the natural femoral neck must carry the mechanical load.

Cementing the Femoral Cap

In the BHR system, the femoral resurfacing component is cemented.

The prepared bone is cleaned.

Bone cement is introduced according to the system's surgical technique.

The metal cap is then seated over the prepared femoral head.

Excess cement is removed.

The central peg contributes alignment but is not comparable to the long stem of conventional THA.

Acetabular Component Fixation

The BHR acetabular component uses cementless press-fit fixation.

The outer surface is designed for biological bone fixation.

The shell must be mechanically stable at implantation.

Bone subsequently grows onto the porous outer surface.

The FDA device instructions emphasize that the porous coating should not be expected to compensate for inadequate initial fixation.

Metal-on-Metal Articulation

Once the femoral cap and socket are implanted, the polished metal surfaces articulate directly with each other.

The diameters are large and engineered with very small clearances.

Lubrication within the joint reduces friction.

Correct component position and manufacture are essential because the bearing mechanics influence wear.

This differs fundamentally from modern ceramic-on-polyethylene THA, where the articulating materials and wear behavior are different.

Trial and Final Reduction

The surgeon reduces the femoral component into the acetabular cup.

Range of motion and stability are assessed.

Soft-tissue tension is evaluated.

Resurfacing generally maintains a femoral head size close to the patient's anatomy, which contributes to stability.

Leg length is also checked.

Unlike stemmed THA, resurfacing offers less opportunity to alter femoral neck length dramatically because the patient's native neck remains.

Leg Length and Offset

Preserving the femoral neck helps retain much of the native proximal femoral geometry.

This can help maintain hip offset and leg length.

However, acetabular component position still influences joint mechanics.

Patients should not be promised perfect numerical equality.

Pre-existing pelvic tilt or contracture can also affect how leg length feels after surgery.

Robotics and Navigation

Computer navigation or robotic planning can potentially assist component positioning.

The most important theoretical benefit relates to acetabular orientation and reproducibility.

However, resurfacing remains technically dependent on correct femoral preparation and patient selection.

A robot does not remove the metal-bearing considerations, improve poor bone quality or eliminate the risk of femoral-neck fracture.

Technology is therefore an adjunct rather than the defining feature of successful resurfacing.

How Long Does Hip Resurfacing Surgery Take?

A straightforward hip resurfacing surgery often takes approximately 90–150 minutes.

The duration varies with surgeon experience, anatomy and previous surgery.

Resurfacing is not necessarily quicker than conventional total hip replacement.

Femoral preparation requires careful alignment, and the surgeon cannot simply remove the femoral head if exposure or geometry becomes difficult.

Operating time should not be used as a measure of surgical quality.

Converting to Total Hip Replacement During Surgery

Occasionally, the surgeon can discover that femoral bone quality is worse than expected.

A fracture can also occur during preparation.

If the femoral head cannot safely support a resurfacing component, conversion to conventional total hip replacement may be necessary.

Patients should understand this possibility before surgery.

An experienced resurfacing surgeon should be willing to abandon resurfacing when proceeding would create unnecessary risk.

Immediately After Surgery

After the operation, the patient moves to the recovery area while anaesthesia wears off.

Blood pressure, breathing, circulation and neurological function are monitored.

Pain and nausea are treated.

The operative leg is examined and the dressing is checked.

Once the patient is medically stable, they can begin the early mobilization pathway.

Pain Control

Modern pain management uses several complementary strategies.

Medication may include paracetamol or acetaminophen, selected anti-inflammatory drugs, local anaesthetic techniques and opioids when necessary.

The objective is enough comfort to mobilize without excessive sedation.

Younger resurfacing patients sometimes expect minimal pain because the procedure is described as bone-preserving, but it remains substantial hip surgery and postoperative soreness is normal.

Walking After Hip Resurfacing

Walking usually begins very early.

Many patients stand on the day of surgery or the following morning.

Crutches, a walker or another aid provide support.

Weight-bearing recommendations vary among surgeons and implant protocols.

Even when full weight bearing is allowed, patients should progress gradually because the femoral neck and surrounding soft tissues require time to adapt.

Why Early Walking Does Not Mean Complete Healing

A resurfacing hip can feel surprisingly stable during the first days.

This can create false confidence, especially in athletic patients.

The ability to walk does not mean the femoral neck has completed biological adaptation or that soft tissues have healed.

Early recovery therefore needs a balance between mobility and protection from excessive loading.

One- or Two-Night Stay

Many otherwise healthy patients remain in hospital for approximately one or two nights.

Selected patients can follow shorter-stay pathways.

Medical conditions, pain, nausea, blood pressure and mobility can extend admission.

The discharge decision should be based on safety.

For international patients, leaving the hospital is also different from being ready for long-distance air travel.

Stairs

Physiotherapists teach safe stair technique when the patient needs it.

A handrail and crutches can provide support.

The patient should be able to manage essential stairs before discharge if the home or hotel requires them.

Repeated stair climbing is not necessary as an early exercise.

Walking quality and controlled movement are more important.

Blood-Clot Prevention

Hip arthroplasty temporarily increases the risk of venous thrombosis.

Preventive medication is commonly prescribed according to local protocol and patient risk.

Early mobilization also helps.

Patients traveling internationally need a particularly clear plan because prolonged sitting during flights creates additional practical concerns.

Discharge

The patient should receive medication instructions, wound-care advice, rehabilitation guidance and emergency contact information.

Weight-bearing status should be clearly documented.

Any movement precautions should be explained.

The implant name and identification information should also be provided because metal-on-metal follow-up can remain relevant for decades.

Recovery after hip resurfacing is often relatively rapid in younger, fit patients, but it should not be rushed.

The first weeks focus on wound healing, gait and controlled strengthening.

Over the following months, the hip gradually feels more natural as inflammation decreases and muscle function improves.

The potential to return to high activity is one reason some patients choose resurfacing, yet the same athletic motivation can create a temptation to load the hip aggressively before healing is mature.

Day of Surgery

The patient begins recovering from anaesthesia and can often sit, stand and take initial steps.

A therapist or nurse assists.

The operated leg can feel heavy and weak.

Short walking sessions are appropriate.

The goal is safe movement rather than demonstrating athletic ability.

Days 1–3

Walking becomes easier.

Crutches or a walker provide stability.

Pain is controlled with the prescribed medication plan.

Swelling and bruising develop around the hip and thigh.

The patient practices transfers and stairs.

Early exercises activate the quadriceps, gluteal muscles and ankle circulation.

Week 1

Most patients become increasingly independent at home.

Walking distance gradually increases.

Fatigue remains normal.

The patient should avoid sudden twisting, falls and high-impact activity.

The incision remains an important focus.

Drainage, increasing redness or fever should be discussed with the surgical team.

Weeks 2–4

Many patients make obvious gains in mobility.

Some reduce their dependence on crutches.

Walking becomes smoother as pain and inflammation decrease.

Desk-based work can become possible for selected patients.

However, a young healthy patient can feel better faster than the bone and soft tissues have biologically recovered.

Activity progression should continue to follow the surgeon's plan.

Weeks 4–6

Patients often regain substantial independence.

Normal household movement becomes easier.

Longer walks can be introduced progressively.

Exercise programmes may include controlled strengthening and stationary cycling.

A limp should continue to improve.

Patients who still limp significantly should not abandon a cane or crutch simply to meet an arbitrary recovery milestone.

Weeks 6–12

Strength and endurance continue improving.

Many routine daily activities are comfortable.

Low-impact cardiovascular exercise becomes easier.

The surgeon may progressively expand permitted activities after reviewing recovery.

Returning to sport remains more cautious than simply returning to ordinary walking.

The femoral neck remains an important mechanical consideration during the early months.

Months 3–6

More demanding exercise can be considered according to imaging, strength and surgeon advice.

Cycling, swimming, hiking and controlled gym training are commonly easier by this stage.

Sports involving impact or rapid changes of direction require greater caution.

A patient should not assume that a large metal bearing means the joint cannot be damaged.

Falls, femoral-neck fracture and abnormal wear remain possible.

Months 6–12

The hip often continues feeling more natural.

Strength, balance and endurance improve.

Athletic patients may work toward higher-level sport.

However, implant-specific recommendations need to be respected.

The FDA-approved BHR instructions caution patients against high-impact activities such as running and jumping during the first postoperative year while bone is healing. FDA Access Data

Return to impact sport should therefore be discussed individually with an experienced resurfacing surgeon.

Hip Resurfacing Recovery Time

For everyday activities, approximately 6–12 weeks is a useful broad estimate.

Many healthy patients are substantially independent earlier.

Full physical recovery can continue for six months or longer.

Return to demanding sports can take longer and should be individualized.

Recovery is not simply the time until pain decreases. It also includes restoring strength, balance and confidence while protecting the remaining femoral bone.

Walking Without Crutches

Some patients transition away from crutches within several weeks.

Others remain on support longer.

The decision depends on gait and surgeon protocol.

If the patient is still leaning or limping, one crutch or a cane can improve walking mechanics.

Using assistance for slightly longer is generally preferable to repeatedly walking with a poor pattern.

Return to Work

Desk-based work can sometimes resume within two to six weeks.

Remote work can begin sooner for selected patients.

Physical occupations require more time.

Jobs involving heavy lifting, ladders, uneven terrain or repetitive impact may require several months.

The surgeon should understand the real demands of the occupation rather than making a recommendation based only on a job title.

Driving

Driving requires adequate leg control, comfortable sitting and the ability to perform an emergency stop.

Patients must also be free from medications that impair reaction time.

Right-sided surgery usually deserves particular caution because braking depends directly on the operated leg.

Many patients return within several weeks, but individual clearance is more appropriate than a fixed date.

Sleeping

Back sleeping is often comfortable initially.

Side sleeping becomes easier as incision sensitivity improves.

The patient should follow any approach-specific restrictions.

A pillow between the legs can improve comfort.

Sleep disturbance is common during the first several weeks and usually improves as pain and swelling decrease.

Gym Training

Gym activity returns progressively.

Stationary cycling and controlled upper-body exercise can be introduced relatively early when safe.

Resistance exercises for the lower body are added gradually.

Heavy squatting, explosive lifting and impact should wait until the surgeon is confident that the femoral neck and surrounding tissues are adequately recovered.

Running After Hip Resurfacing

The possibility of returning to running is one of the major reasons some athletes investigate resurfacing.

Some resurfacing patients do return to running and high-level sport.

That does not mean running is automatically recommended for every patient.

Activity advice depends on implant, bone quality, surgeon philosophy and the amount of time since surgery.

High activity can theoretically increase metal-bearing wear, so the decision involves more than dislocation risk alone.

Return to Sport

Return to sport is generally progressive.

Cycling, swimming and controlled strength training usually precede running and high-impact sport.

Athletes should demonstrate adequate strength, balance and hip control before returning to competition.

A resurfaced hip should not be treated as indestructible simply because it preserves more natural bone.

Flying After Surgery

Long-distance flying should be planned with the medical team.

The patient must be mobile enough to navigate the airport and sit comfortably.

Blood-clot risk remains elevated after major joint surgery.

International patients should remain near the surgical center long enough for early wound assessment and medical review rather than selecting a departure date purely on hotel-package length.

Hip resurfacing can produce excellent outcomes in carefully selected patients, but success is highly dependent on patient selection, implant design and surgeon experience.

This is one of the most important distinctions between resurfacing and routine modern total hip replacement.

A successful resurfacing generally provides major pain relief, improved range of motion and return to high function.

Patients can achieve activity levels that compare favorably with total hip replacement.

However, broad resurfacing results that combine excellent devices with historically poor-performing systems can be misleading.

Birmingham Hip Resurfacing Long-Term Outcomes

Birmingham Hip Resurfacing has some of the strongest long-term evidence within the resurfacing category.

A 2024 systematic review covering 7,132 BHR procedures with at least ten years of follow-up reported an overall revision rate of approximately 4.9%, with high patient satisfaction. Another systematic review of 3,129 cases calculated pooled 10-year survival of approximately 95.5%.

These figures are useful for understanding the durability of a well-established implant, but they should not be interpreted as a guarantee that every patient has a 95% chance of the same result.

Sex, femoral-head size, diagnosis, implant positioning and surgeon experience all influence individual risk.

How Long Does Hip Resurfacing Last?

The question “how long does hip resurfacing last?” should be answered in terms of probability rather than a fixed expiration date.

There is no point at which a functioning resurfacing automatically needs replacement.

Contemporary BHR studies demonstrate that many implants continue functioning beyond 15 and 20 years.

A 2023 report of BHR at a mean follow-up of about 21 years found 20-year survivorship of 96.5% in male patients and 87% in female patients. A 25-year cohort published in 2024 reported overall survival of 83.5%, with survival of 89.5% in men and 66.9% in women.

This variation reinforces why individual selection matters.

Can Hip Resurfacing Last 20 Years?

Yes.

There are well-documented Birmingham resurfacing cohorts with functioning implants beyond 20 years.

This does not mean every implant lasts that long.

A patient can require earlier revision because of metal-related tissue reaction, loosening, femoral-neck fracture, infection or another problem.

The best long-term results are concentrated in carefully selected groups and should not be generalized to every patient or every resurfacing design.

Can Hip Resurfacing Last a Lifetime?

It is possible for an implant to function for the remainder of an individual patient's life, but no surgeon can promise this.

A 40-year-old receiving resurfacing potentially has 40 or more years of future implant demand.

Even excellent 20- and 25-year data cannot fully predict performance over an entire young adult lifetime.

The more useful discussion is how resurfacing compares with modern total hip replacement for that patient's age, anatomy, activity and willingness to accept metal-on-metal surveillance.

Hip Resurfacing vs Total Hip Replacement Outcomes

Recent randomized-trial evidence suggests that both resurfacing and total hip arthroplasty can produce strong functional results in selected patients.

A 2024 systematic review of randomized trials found no statistically significant differences in several functional and revision outcomes, while dislocation was lower in the resurfacing group. A 2026 comparative meta-analysis also found broadly similar overall outcomes, with resurfacing showing advantages in some activity and satisfaction measures but no universal superiority.

These results should not be interpreted as evidence that every arthritis patient should choose resurfacing.

Clinical selection remains far narrower.

Activity Levels

One of resurfacing's major attractions is its use in younger and more athletic populations.

Several observational studies have reported high postoperative activity scores.

The preserved proximal femoral anatomy and large-diameter bearing may contribute to a more natural mechanical experience for some patients.

However, high activity increases cumulative implant loading.

The relationship between sport and long-term implant survival remains complex, and unrestricted impact activity should not be treated as automatically safe.

Dislocation

Dislocation rates after well-performed hip resurfacing are typically low.

The large femoral diameter closely approximates the native anatomy and creates a substantial jump distance before the head can leave the socket.

This is a genuine mechanical advantage.

However, low dislocation risk does not mean the procedure is lower-risk overall.

Resurfacing exchanges some conventional THA risks for issues such as femoral-neck fracture and metal-related adverse tissue reactions.

Femoral-Neck Fracture

Fracture through the preserved femoral neck is a resurfacing-specific failure mechanism.

Risk is influenced by bone quality, surgical notching, component orientation, trauma and patient characteristics.

A fracture usually requires conversion to conventional total hip replacement.

This complication is one of the key reasons patients with weak bone are poor resurfacing candidates.

Avascular Necrosis After Resurfacing

The femoral head remains in place after resurfacing.

If its blood supply becomes inadequate, portions can collapse.

Surgical technique attempts to preserve vascularity, but femoral-head collapse remains a recognized failure mode.

Patients with pre-existing osteonecrosis deserve particularly careful selection because they already have compromised bone biology.

Aseptic Loosening

Either the femoral or acetabular component can loosen without infection.

Modern successful resurfacing systems have relatively low loosening rates in appropriate patients.

Symptoms can include increasing groin or thigh pain.

Serial X-rays help identify migration.

Revision strategy depends on which component has failed and whether metal-related tissue damage is also present.

Adverse Reaction to Metal Debris

Metal-related complications remain one of the most important long-term limitations.

A 2024 systematic review of long-term BHR studies identified adverse reaction to metal debris among the principal reasons for revision. Another long-term systematic review found aseptic loosening and metal-debris reactions each represented about one-fifth of reported revisions.

This risk explains why excellent implant survivorship does not eliminate the need for long-term monitoring.

Metal Ion Monitoring

There is no universally reliable cobalt or chromium value that alone tells the surgeon whether a resurfacing implant is healthy.

The FDA specifically notes that the relationship between isolated blood metal-ion levels and local or systemic adverse reactions is not fully established.

Results should therefore be interpreted alongside symptoms, examination, radiographs and soft-tissue imaging where appropriate.

Serial changes can be more informative than one isolated measurement.

Long-Term Follow-Up

Patients should continue follow-up after the initial recovery.

FDA guidance recommends periodic long-term follow-up for metal-on-metal implant patients, typically every one to two years, with closer monitoring for patients at elevated risk.

Local regulatory guidance can differ.

The principle remains that a metal-on-metal resurfacing should not simply disappear from medical attention because the patient feels well.

Revision After Hip Resurfacing

A failed resurfacing can be converted to total hip replacement.

If only the femoral component fails and the socket is well positioned and compatible with the planned reconstruction, revision options depend on the exact implant system and clinical circumstances.

In some systems, acetabular revision can also be necessary because compatible non-metal femoral-head options may not be available.

Metal-related tissue damage can make revision considerably more complex than the phrase “bone preserving” might suggest.

Patient Satisfaction

Well-selected resurfacing patients often report high satisfaction.

This probably reflects a combination of effective pain relief, high baseline motivation, preserved anatomy and the ability to participate in demanding activities.

However, patient satisfaction data should be interpreted alongside selection bias.

Resurfacing populations are typically younger, healthier and more active than conventional THA populations.

A fair comparison therefore requires careful matching rather than simply comparing raw satisfaction percentages.

Birmingham Hip Resurfacing System

The Birmingham Hip Resurfacing System is the most widely recognized modern resurfacing prosthesis.

Its femoral component is made from cobalt-chromium alloy and covers the prepared femoral head.

The acetabular component is also cobalt-chromium and uses press-fit fixation.

The femoral cap is cemented while the acetabular component is cementless.

The system's long clinical history distinguishes it from resurfacing implants that were introduced and later abandoned after poor performance.

Femoral Resurfacing Component

The femoral component is hollow internally so that it fits over the reshaped femoral head.

A short central peg extends into the head.

The cap maintains a large external diameter similar to the natural femoral head.

This preservation of diameter contributes to joint stability.

The implant does not extend down the femoral canal like a conventional THA stem.

Acetabular Component

The acetabular shell replaces the damaged socket surface.

Its outer surface is designed to achieve press-fit fixation and biological attachment to pelvic bone.

Its inner polished surface articulates directly with the femoral metal cap.

Because the articulation is metal-on-metal, acetabular orientation has important implications for wear.

Cobalt-Chromium Alloy

Cobalt-chromium is strong, hard and wear resistant.

These characteristics made it attractive for large-diameter metal bearings.

However, microscopic wear still occurs.

Metal particles can remain in the joint and cobalt and chromium ions can enter circulation.

The clinical significance varies between patients, which is why metal-on-metal implants require a monitoring strategy different from modern polyethylene bearings.

Cemented Femoral Fixation

The femoral resurfacing cap is commonly fixed using bone cement.

Cement fills the space between prepared bone and the interior of the component.

Technique is important because excessive cement penetration or thermal effects can theoretically affect bone biology, while insufficient fixation can compromise stability.

The surgeon follows implant-specific technique rather than treating the cap like a conventional cemented femoral stem.

Cementless Acetabular Fixation

The socket generally achieves initial press-fit stability.

Its outer porous surface then supports longer-term biological fixation.

This means the acetabular side functions similarly to many modern cementless THA cups.

Appropriate sizing and bone contact are crucial.

The component should not rely on coating alone to compensate for inadequate stability.

Component Size

Resurfacing systems offer multiple femoral and acetabular sizes.

The femoral size is determined by the patient's anatomy.

The matching acetabular component must then be selected within the implant system.

Because small resurfacing sizes have historically been associated with less favorable metal-bearing mechanics, anatomy can influence candidacy even when bone quality is otherwise good.

Implant Compatibility

Components from different manufacturers should not be mixed unless a specifically approved system permits it.

Metallurgy, tolerances and bearing clearances are carefully engineered.

BHR labeling specifically warns against mixing its components with another manufacturer's system.

This becomes particularly relevant during revision planning years later.

Patients should therefore keep implant documentation.

Fluoroscopy

Fluoroscopy can be used selectively to assess component position.

It is not mandatory for every resurfacing procedure.

Experienced surgeons can also rely on anatomical landmarks and dedicated instrumentation.

If imaging is used, it should complement rather than replace direct surgical assessment.

Computer Navigation

Navigation can provide numerical information about acetabular inclination and anteversion.

This can be attractive in resurfacing because metal-bearing wear is sensitive to cup orientation.

The system can also assist with femoral alignment.

However, technical accuracy does not eliminate biological problems such as weak bone or metal sensitivity.

Robotic-Assisted Hip Resurfacing

Robotic planning can potentially help with acetabular positioning and individualized reconstruction.

Its use is much less widespread than robotic total hip replacement.

There is no basis for claiming that resurfacing must be robotic to achieve a good result.

A highly experienced resurfacing surgeon using conventional instrumentation can achieve excellent outcomes.

The central factors remain appropriate patient selection, precise implant positioning and long-term follow-up.

Future Non-Metal Resurfacing Technologies

Interest continues in resurfacing concepts that avoid metal-on-metal articulation.

Ceramic and other alternative technologies have been investigated because they could theoretically preserve the mechanical advantages of resurfacing while reducing cobalt-chromium exposure.

However, patients should distinguish between experimental or limited-market technologies and established devices with long-term clinical data.

Orthopedic Abroad should list an implant only when its current regulatory status and availability with the partner hospital are verified.