Hip Replacement

Introduction

Hip replacement is one of the most established and reliable operations in modern orthopaedic surgery. For people living with severe hip pain that limits walking, sleep, and daily life, it offers the chance to return to comfortable movement after years of struggle. If you have been told you may need a hip replacement, or you are weighing the decision, this article is written for you.

The pages ahead describe what hip replacement is, the different types and surgical approaches, who is considered a good candidate, what to expect before and after surgery, the risks involved, and what life tends to look like in the months and years afterwards. The aim is to help you understand the medical landscape so you can have a more informed conversation with your orthopaedic surgeon, who will guide the choices that fit your specific situation.

What Is Hip Replacement?

Hip replacement, also called hip arthroplasty, is a surgical operation in which the damaged surfaces of the hip joint are removed and replaced with artificial parts known as a prosthesis or implant. The hip is a ball-and-socket joint: the ball is the top of the thigh bone (femoral head), and the socket is a cup-shaped hollow in the pelvis (acetabulum). In a healthy hip, smooth cartilage covers both surfaces so the joint glides without pain.

The hip joint showing the femoral head seated within the acetabular socket of the pelvis.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

When that cartilage wears away or the bone is damaged, the joint becomes painful and stiff. In a total hip replacement, both the ball and the socket are replaced. The damaged ball is removed and replaced with a metal or ceramic head fixed to a stem that sits inside the thigh bone. The socket is reshaped and lined with a smooth cup, typically made of metal with a plastic, ceramic, or metal inner liner. Together, these parts recreate a smooth, low-friction joint.

A natural hip joint alongside a total hip replacement implant seated in the same position.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

The operation usually takes one to two hours. Most people stay in hospital for a few days, although enhanced recovery programmes in some centres allow shorter stays. Hip replacement is overwhelmingly performed in adults, most commonly in people over the age of 50, although younger patients with certain conditions may also undergo the surgery.

Why Is Hip Replacement Performed?

Hip replacement is considered when hip pain and loss of function have become severe enough to interfere significantly with daily life, and when non-surgical treatments are no longer providing enough relief. The most common underlying conditions include:

• Osteoarthritis. This is by far the most common reason for hip replacement. Over time, the cartilage in the hip wears down, bone rubs on bone, and the joint becomes painful, stiff, and increasingly limited in movement.
• Rheumatoid arthritis. An autoimmune condition in which the body's immune system attacks the joint lining, leading to inflammation, cartilage damage, and joint destruction.
• Avascular necrosis (osteonecrosis) of the hip. Loss of blood supply to the femoral head causes the bone to collapse. Causes include long-term steroid use, heavy alcohol use, certain blood disorders such as sickle cell disease, and trauma.
• Hip fracture. Particularly in older adults, a fracture of the femoral neck (the area just below the ball) often does not heal well. In these cases, replacing the broken part with an implant is frequently a better solution than trying to fix it.
• Developmental hip dysplasia. A condition present from childhood in which the hip socket did not form properly, leading to early arthritis in adulthood.
• Post-traumatic arthritis. Arthritis that develops years after a serious hip injury.
• Ankylosing spondylitis and other inflammatory conditions that can damage the hip joint.
• Bone tumours involving the upper thigh bone, in rare cases.

The decision to recommend hip replacement is usually based on a combination of pain severity, functional limitation, and findings on X-rays or other imaging. Doctors generally consider surgery when a person can no longer walk reasonable distances, struggles to sleep because of pain, has difficulty with basic activities such as putting on socks or getting in and out of a car, and has not gained adequate relief from medications, physiotherapy, weight management, and other non-surgical approaches.

Who Is a Candidate?

There is no single age cutoff for hip replacement. Decisions are made based on individual circumstances rather than a number on a calendar. That said, certain factors tend to be considered:

Factors that favour surgery

• Pain that significantly limits daily activities and is not adequately controlled by medication or other measures
• Clear evidence of joint damage on imaging that matches the pattern of pain
• Overall health that can support a planned operation and the rehabilitation that follows
• Realistic understanding of what the surgery can and cannot achieve

Factors that may complicate or delay surgery

• Active infection anywhere in the body, which must be treated first
• Severe heart, lung, or kidney disease that increases the risks of anaesthesia and surgery
• Uncontrolled diabetes, which raises infection and healing risks
• Very high body weight, which increases mechanical stress on the implant and certain complication risks; doctors may recommend weight reduction before surgery in some cases
• Smoking, which slows healing and raises complication rates; many surgeons recommend stopping before surgery
• Severe osteoporosis, which can affect how the implant anchors into bone

Younger patients

Hip replacement was once reserved largely for older adults, partly because implants had limited lifespans and surgeons worried that younger patients would outlive their replacements. With modern materials and surgical techniques, durability has improved, and the operation is now offered to younger people when their pain and disability warrant it. However, younger and more active patients place greater demands on the implant, and the possibility of needing a future revision is openly discussed.

Children and adolescents

Hip replacement in children is uncommon and is reserved for serious conditions such as juvenile arthritis, certain bone tumours, or severe injury when joint-preserving options have been exhausted. These cases are managed in specialist paediatric orthopaedic centres.

Alternatives to Hip Replacement

Before recommending surgery, doctors typically explore a range of non-surgical and less invasive options. For some people, these can manage symptoms for years.

Lifestyle and physical therapy

Weight management reduces the load on the hip joint and often eases pain. Regular low-impact exercise — such as swimming, cycling, and walking — helps maintain joint movement and muscle strength. Physiotherapy programmes focus on strengthening muscles around the hip and core, improving flexibility, and teaching movement patterns that reduce joint stress.

Medications

Pain relievers such as paracetamol and non-steroidal anti-inflammatory drugs (NSAIDs) are commonly used. For inflammatory conditions like rheumatoid arthritis, disease-modifying medications can slow joint damage and reduce symptoms. Long-term opioid use is generally discouraged because of side effects and limited long-term benefit.

Injections

Corticosteroid injections into the hip joint can provide temporary relief for some people. The benefit is often measured in weeks to months rather than years, and the number of injections is usually limited. Other injection types, such as hyaluronic acid or platelet-rich plasma, have less consistent evidence in the hip than in some other joints.

Assistive devices

A walking stick or cane held in the hand opposite to the painful hip can significantly reduce the force going through the joint. Shoe modifications and other aids may also help.

Joint-preserving surgery

In younger patients with specific anatomic problems — such as femoroacetabular impingement, labral tears, or hip dysplasia — surgeons may consider operations that preserve the natural joint. These include hip arthroscopy (a keyhole operation to address pinching or torn cartilage) and osteotomy (reshaping the bone to improve joint alignment). These are not options for advanced arthritis, but may delay the need for replacement when used at the right stage.

Hip resurfacing

Hip resurfacing is an alternative to full replacement in selected patients. Instead of removing the femoral head, the surgeon reshapes it and covers it with a metal cap, while the socket is lined with a metal cup. It preserves more of the natural bone, which can be an advantage if revision surgery is needed later. Resurfacing is generally considered mostly for younger, active men with strong bones, because of specific implant requirements. It is performed less commonly than total hip replacement, and not all surgeons offer it.

Types of Hip Replacement

Several variations of hip replacement exist. The choice depends on the underlying condition, the patient's age and activity level, bone quality, and the surgeon's experience.

Total hip replacement

The most common form. Both the ball (femoral head) and the socket (acetabulum) are replaced. This is the standard operation for advanced arthritis and most other indications.

Partial hip replacement (hemiarthroplasty)

Only the ball is replaced; the natural socket is left in place. This is most often used for certain types of hip fracture in older patients with limited mobility, where a full replacement may not be necessary and a simpler operation carries fewer risks.

Hip resurfacing

As described above, the femoral head is preserved and capped rather than removed. Resurfacing is offered in selected cases by surgeons trained in the technique.

Revision hip replacement

This is a second (or later) operation to replace an implant that has worn out, loosened, become infected, or otherwise failed. Revision surgery is more complex than the original replacement, takes longer, and has different recovery and risk patterns.

Surgical Approaches

The surgical approach refers to where the surgeon makes the incision and how they reach the hip joint through the surrounding muscles. Each approach has its own pattern of advantages and trade-offs. No single approach is best for all patients; surgeons typically use the approach they are most experienced with and which suits the individual case.

Three common surgical approaches to the hip showing posterior, anterior, and lateral incision sites.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Posterior approach

This is the most widely used approach worldwide. The incision is made on the back and side of the hip. The surgeon reaches the joint by moving aside or detaching some of the muscles at the back of the hip, which are then repaired at the end of the operation. The posterior approach gives the surgeon excellent visibility of the joint and is versatile for complex cases. Recovery is well established. Historically, there has been a slightly higher risk of dislocation in the early weeks, although improvements in technique and implant positioning have narrowed this difference.

Anterior approach (direct anterior)

The incision is made on the front of the hip. The surgeon reaches the joint by moving between muscles rather than cutting through them. Many patients experience a faster early recovery and may have a lower risk of dislocation in the first weeks. The approach can be technically demanding, particularly in patients with larger body size or certain anatomic patterns, and not all surgeons offer it.

Lateral approach (direct lateral or anterolateral)

The incision is on the side of the hip. The surgeon detaches part of the hip abductor muscles to reach the joint and reattaches them at the end. The lateral approach has a low dislocation rate, but some patients experience a temporary limp because of how the muscles heal.

Minimally invasive techniques

Some centres offer minimally invasive variants of these approaches, using smaller incisions and specialised instruments. Potential benefits include less muscle disruption and a quicker early recovery, but the operation remains the same in terms of what is done inside the joint. Long-term results depend more on implant position and overall surgical quality than on incision length.

Computer-assisted and robotic-assisted surgery

Some surgeons use computer navigation systems or robotic assistance to help with precise implant positioning. These technologies do not replace the surgeon but may improve accuracy. Their long-term impact on outcomes continues to be studied.

Implant Choices

Hip implants come in many designs and material combinations. Decisions are usually made by the surgeon based on patient age, activity level, bone quality, and other factors.

Exploded view of total hip replacement components: femoral stem, ball head, acetabular cup, and inner liner.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

Materials

• Metal-on-polyethylene. A metal ball moves against a plastic (highly cross-linked polyethylene) liner. This is the most common combination and has a long track record.
• Ceramic-on-polyethylene. A ceramic ball with a plastic liner. Ceramic is very smooth and hard-wearing.
• Ceramic-on-ceramic. Both surfaces are ceramic. Wear rates are very low. Rare but possible drawbacks include squeaking and a small risk of ceramic fracture.
• Metal-on-metal. Once popular, particularly in resurfacing, but now used much less in total replacement due to concerns about metal debris and ion levels in some patients.

Fixation: cemented or uncemented

The implant must anchor securely to the bone. Two main fixation methods exist:

• Cemented. A special bone cement (a quick-setting acrylic) is used to fix the implant into the bone. Cemented fixation provides immediate strong attachment and is often preferred in older patients or those with softer bone.
• Uncemented (press-fit). The implant has a textured or porous surface, and bone grows into it over several weeks to create a biological bond. Often used in younger patients with strong bone.
• Hybrid. One component (often the socket) is uncemented and the other (often the stem) is cemented, or vice versa.

Modern implants of all these types have good track records when chosen appropriately for the patient.

Preparing for Hip Replacement

Good preparation can make recovery smoother. Surgeons and their teams will typically guide you through several steps in the weeks before surgery.

Medical assessment

You will likely have blood tests, an ECG (heart tracing), and a review of your medications. Long-term conditions such as diabetes, high blood pressure, and heart disease will be reviewed to ensure they are well controlled before surgery. Some medications, particularly blood thinners and certain rheumatoid arthritis drugs, may need to be paused. Always check with your doctor before stopping anything.

Dental check

Some surgeons recommend addressing any dental problems before joint replacement, because bacteria from dental infections can occasionally reach the new joint through the bloodstream.

Lifestyle steps

• Stopping smoking. Even a few weeks of stopping before surgery improves healing and reduces complications.
• Limiting alcohol. Heavy alcohol use raises surgical and anaesthetic risks.
• Improving nutrition. A balanced diet with adequate protein supports tissue healing.
• Weight management. If body weight is high, even modest reduction can ease recovery and reduce certain risks.
• Pre-habilitation. Exercises before surgery to strengthen muscles around the hip, the other leg, and the upper body (which will help you use crutches or a frame) can shorten recovery time.

Home preparation

Before going to hospital, it helps to make the home easier to move around in after surgery. Useful steps include:

• Removing loose rugs and clearing walking paths
• Placing frequently used items at waist or chest height so you do not have to bend
• Arranging a comfortable chair with firm support and arm rests
• Considering a raised toilet seat and grab rails in the bathroom
• Planning meals or arranging help with cooking for the first weeks
• Arranging someone to help at home, particularly for the first one to two weeks

What Happens During Hip Replacement

On the day of surgery, you will be admitted to hospital and meet the surgical team, anaesthetist, and nurses. The anaesthetist will discuss the type of anaesthesia. Many hip replacements are done under spinal anaesthesia (an injection in the back that numbs you from the waist down), often combined with light sedation, although general anaesthesia is also an option. Spinal anaesthesia has been associated with lower rates of certain complications in joint replacement and is widely used.

In the operating room:

1. You are positioned on the operating table according to the chosen surgical approach (on your back for anterior, on your side for posterior or lateral).
2. The skin is cleaned thoroughly with antiseptic, and the area is draped.
3. Antibiotics are given through a vein to reduce infection risk.
4. The surgeon makes the incision and reaches the hip joint through the chosen approach.
5. The damaged femoral head is removed.
6. The socket is prepared and the new cup is fixed in place.
7. The thigh bone is hollowed out to accept the stem of the new implant. The stem is then inserted, with or without cement as planned.
8. The new ball is fitted onto the stem and placed into the new socket. The surgeon checks stability and leg length.
9. The wound is closed in layers and a dressing is applied.

The operation typically takes one to two hours. Blood loss is usually modest, and modern techniques mean blood transfusion is needed only in a minority of cases.

Recovery and Healing

Recovery from hip replacement unfolds over weeks to months. Most people are surprised by how quickly the early steps happen, and equally surprised that full recovery continues to develop over a longer period than they expected.

A staged recovery timeline from hip replacement surgery through to full activity resumption.

*AI-generated image - for illustration only. Clinical accuracy is not guaranteed.

The first hours and days

Modern enhanced recovery programmes aim to get patients up and walking on the day of surgery or the day after. A physiotherapist helps you stand, take your first steps with a walking frame or crutches, and learn safe movements. Pain is managed with a combination of medications. Most people stay in hospital for one to four days, although this varies by patient, surgeon, and hospital.

Before going home, you should be able to:

• Get in and out of bed safely
• Walk a short distance with crutches or a frame
• Manage stairs if relevant for your home
• Understand the exercises and movement precautions for your specific approach

The first weeks at home

For the first few weeks, you will use crutches or a frame. Physiotherapy exercises focus on activating the hip and thigh muscles, regaining range of movement, and walking with a steady gait. Pain typically improves steadily, although swelling and bruising can take longer to settle. Sleeping positions, getting dressed, and using the bathroom may all require small adaptations at first.

Many surgeons advise specific movement precautions in the early weeks — for example, avoiding deep hip bending, crossing the legs, or extreme rotation — particularly after the posterior approach. The exact precautions vary, and your team will give you guidance specific to your operation.

Weeks four to twelve

Most people gradually transition from crutches to a single stick and then to walking unaided, usually within four to eight weeks, although this varies. You will likely return to driving when you can comfortably control the vehicle and perform an emergency stop — commonly around six weeks, but earlier or later depending on which side was operated on, your recovery, and the type of car. Office-based work is often resumed within four to six weeks; physically demanding work may take longer.

Three to twelve months

Muscle strength, walking endurance, and confidence continue to build over many months. Most people consider themselves “recovered” somewhere between three and six months, but subtle improvements often continue up to a year. Activities such as gentle hiking, golf, swimming, and cycling are usually returned to during this phase. High-impact activities are generally discouraged.

Rehabilitation principles

Engaging actively with physiotherapy is one of the most important parts of recovery. Strong muscles around the hip protect the new joint, improve gait, and reduce the risk of falls. Consistent home exercise, attendance at scheduled physiotherapy sessions, and gradual progression of activity all support the best outcome.

Risks and Complications

Hip replacement is a safe and effective operation for most people, but like any major surgery it carries risks. Understanding them is part of giving informed consent.

General surgical risks

• Infection. Despite preventive antibiotics and sterile technique, a small number of patients develop infection in the wound or, more seriously, deep around the implant. Deep infection can require further surgery and prolonged antibiotic treatment.
• Blood clots. Deep vein thrombosis (DVT) in the leg and, rarely, pulmonary embolism in the lungs are recognised risks. Preventive measures include early walking, compression stockings or devices, and blood-thinning medication.
• Bleeding. Some bleeding is expected. Significant bleeding requiring transfusion is uncommon with modern techniques.
• Anaesthetic complications. Reactions to anaesthesia, breathing problems, and heart events are rare but possible, particularly in patients with significant other health conditions.

Hip-specific complications

• Dislocation. The ball can come out of the socket, particularly in the first few weeks before the soft tissues fully heal. Dislocation usually requires a hospital visit to reposition the joint. Repeated dislocation may need further surgery.
• Leg length difference. Surgeons aim to match leg lengths exactly, but small differences are common and most people adjust without difficulty. Larger differences are uncommon and can sometimes be addressed with a shoe insert.
• Nerve or blood vessel injury. Rare, but possible, particularly the sciatic nerve. Most nerve injuries are partial and recover over time.
• Fracture during surgery. The thigh bone can crack during implant insertion, particularly in patients with weaker bone. This is usually recognised and managed during the same operation.
• Loosening or wear over time. Over many years, the implant can loosen from the bone or its bearing surfaces can wear. This may eventually require revision surgery.
• Stiffness and reduced movement. Most people regain good movement, but some retain stiffness, particularly if they had significant stiffness before surgery.
• Heterotopic ossification. Bone can sometimes form in the soft tissues around the hip after surgery. In most cases this causes no symptoms; occasionally it limits movement.
• Allergic or sensitivity reactions to implant materials. Rare, but recognised. Patients with known metal allergies should mention this before surgery so alternative materials can be considered.

How risks are reduced

Surgical teams take many steps to minimise these risks: careful patient selection and preparation, preventive antibiotics, blood clot prevention, sterile surgical technique, modern implants, and structured rehabilitation. Discussing your specific risk profile with your surgeon is part of the pre-operative process.

Life After Hip Replacement

For most people, life after hip replacement is significantly better than life before it. Pain that has dominated daily life for years often falls away dramatically in the first weeks. Sleep improves. Walking becomes possible again. Activities that had been quietly given up — gardening, travel, longer walks, dancing — gradually return.

Activities and sport

Most surgeons encourage active lifestyles after recovery. Recommended activities typically include:

• Walking (including longer distances)
• Swimming and water exercise
• Cycling (stationary and outdoor)
• Golf
• Hiking on reasonable terrain
• Doubles tennis (often allowed after full recovery, depending on the surgeon)
• Gentle yoga and pilates, with awareness of movement limits

High-impact activities such as running, jumping sports, and contact sports are generally discouraged, because repeated impact accelerates wear of the implant. Specific guidance varies by surgeon, implant type, and individual recovery.

Long-term durability

Modern hip implants have very good long-term durability. The majority of well-functioning hip replacements last many years, and a significant proportion last more than two decades. Specific longevity depends on many factors, including patient weight, activity level, implant type, and surgical technique. Younger and more active patients may eventually face the prospect of a revision operation later in life, and this is openly discussed before surgery.

Follow-up

Most surgeons recommend a follow-up at six weeks, three months, one year, and then at longer intervals afterwards. X-rays may be taken periodically to check the position of the implant. Any new pain, change in walking, or other concerns should be reported promptly.

Dental and other procedures

Because bacteria from elsewhere in the body can occasionally settle on the new joint, some surgeons and dentists discuss preventive antibiotics before certain dental or invasive procedures, particularly in the first two years after surgery. Practices vary, and your surgeon will give specific guidance.

Travel

Air travel is usually possible after recovery, though long flights in the early weeks increase the risk of blood clots. Most surgeons advise waiting several weeks before long flights and using preventive measures such as compression stockings, hydration, and frequent movement. The metal in the implant may set off airport scanners, but no special documentation is generally required.

Frequently Asked Questions

How long will my new hip last?

Modern hip implants commonly last well over a decade, and many last two decades or more. Durability varies with the patient's weight, activity level, implant choice, and surgical technique. Younger and more active patients may use up the lifespan of the implant sooner than older, less active patients.

Will I be able to walk normally again?

Most people walk without a limp or aid after full recovery, particularly when they engage with physiotherapy and rebuild muscle strength. A small number have a residual mild limp, which may relate to muscle weakness, leg length difference, or other factors.

How much pain should I expect after surgery?

Pain is highest in the first few days and is managed with a combination of medications. Most people are surprised at how quickly the deep, grinding pre-operative pain disappears. Surgical pain — the pain of the operation itself — settles over the following weeks. Occasional soreness with activity can persist for several months as tissues continue to heal.

When can I drive again?

Driving is typically resumed when you can comfortably control the car and perform an emergency stop. This is often around six weeks, but earlier or later depending on which hip was operated on, the type of car, and individual recovery. Always check with your surgeon and your insurance.

Will I set off airport security scanners?

The metal in a hip implant may trigger some scanners. Most airports use modern systems and the implant is easily identified. A formal implant card is generally not required, though some patients prefer to carry a brief note from their surgeon.

Can I sleep on my side?

In the early weeks, many surgeons advise sleeping on the back with a pillow between the legs, particularly after the posterior approach. Sleeping on the operated side and then on either side becomes possible as healing progresses. Your surgical team will give guidance specific to your approach.

Will I need to follow movement restrictions forever?

The strict early precautions — such as avoiding deep bending or crossing the legs — usually apply for the first six to twelve weeks, when the soft tissues are still healing. After that, most movements return to normal, although high-impact activities are generally discouraged long term.

What happens if my hip dislocates?

A dislocation is painful and obvious — you usually cannot move the leg. It needs to be reduced (put back in place) in a hospital, almost always under sedation or anaesthesia. After a single dislocation, the joint often remains stable. Repeated dislocations may need further evaluation and sometimes surgery.

Can both hips be replaced at the same time?

In selected patients with severe arthritis in both hips, simultaneous bilateral hip replacement (both at once) is sometimes performed. This means one anaesthetic and one rehabilitation period, but a more demanding operation overall. Many surgeons prefer staged surgery (one hip first, then the other after recovery), particularly in older patients or those with significant other health conditions. The decision depends on individual factors.

What does revision surgery involve?

Revision hip replacement removes the existing implant and replaces it with a new one. The operation is longer and more complex than the original, because there may be bone loss, scar tissue, and altered anatomy. Recovery often takes longer. Outcomes are generally good, though typically not quite as predictable as a first-time replacement.

Conclusion

Hip replacement is a well-established operation with a strong track record of relieving pain and restoring function for people whose hip joints have been damaged by arthritis, fracture, or other conditions. The specific choices — total or partial, surgical approach, implant material, fixation method are made in conversation between the patient and the orthopaedic surgeon, based on the individual's anatomy, condition, age, activity level, and goals.

For most people, the operation marks a turning point: a return to comfortable walking, restful sleep, and activities that had become impossible. Recovery takes time and effort, and the rehabilitation phase is as important as the surgery itself. Understanding what to expect the timeline, the precautions, the risks, the long-term outlook helps make the journey smoother and the outcome better.

If you are considering hip replacement or preparing for surgery, the questions and possibilities discussed in this article are a starting point. Your surgeon, anaesthetist, physiotherapist, and the wider care team will guide the decisions and steps that are right for your specific situation.