Hip Replacement Surgery: Materials, Approach, and Outcomes

The total hip replacement is widely regarded as one of the great success stories of twentieth-century medicine. Forty years ago it was a major operation reserved for elderly patients with end-stage arthritis. Today it is performed routinely from the late 40s onwards, recovery is measured in weeks rather than months, and modern implants regularly last over twenty-five years. For most patients the operation is genuinely life-changing — many describe getting their freedom back. This article explains the modern hip replacement: what is actually done in surgery, the choice of materials and surgical approach, what recovery looks like, and the long-term outlook.

Who needs a hip replacement?

The decision rests on three pillars, all of which must be true. First, the imaging — usually a standing pelvic X-ray — must show end-stage joint destruction, typically advanced osteoarthritis, but also avascular necrosis, post-traumatic arthritis, inflammatory arthritis, or hip dysplasia complications. Second, the symptoms must be limiting daily life: groin and lateral hip pain, difficulty walking distances, trouble putting on shoes and socks, night pain that disturbs sleep. Third, non-surgical measures — physiotherapy, weight management, analgesics, occasional injections — must have been honestly tried and failed to give lasting relief.

When all three are present, hip replacement is the most predictable, highest-satisfaction operation in orthopedic surgery, with patient satisfaction rates above 95%.

What the operation does

The hip is a ball-and-socket joint — the ball is the head of the femur, the socket is the acetabulum of the pelvis. Both surfaces are normally covered in smooth cartilage. In end-stage arthritis, the cartilage is gone. The operation removes the diseased head of the femur and resurfaces the acetabulum with a metal cup. A new ball — typically ceramic, sometimes metal — is placed on a stem that fits inside the femur. A bearing of polyethylene or ceramic sits between the ball and the cup as the new joint surface.

Surgical approaches

There are three established approaches to the hip joint, each with its own characteristics:

• Posterior approach — the most commonly used worldwide. Excellent visualisation, suits all body types, and modern technique with capsule repair has dramatically reduced the historic dislocation risk.
• Anterior approach (direct anterior) — a muscle-sparing approach that may give a slightly faster early recovery. Best in selected patients; not all anatomies are well suited.
• Lateral approach — older, reliable, lower dislocation rate but a slightly higher rate of postoperative limp from soft tissue handling.

The literature shows that long-term outcomes are similar across approaches when performed by an experienced surgeon. The right approach is the one your surgeon performs most often and most safely.

Implant materials

The bearing surfaces — the parts that move against each other — drive long-term wear. Three combinations dominate modern practice:

• Ceramic-on-polyethylene — the most common modern combination. Excellent wear characteristics, very low complication rate, and reliable two-decade performance.
• Ceramic-on-ceramic — lowest wear, useful in young, very active patients, with a small risk of squeaking and a small risk of catastrophic ceramic fracture (rare with modern manufacturing).
• Metal-on-polyethylene — still widely used and reliable for older patients.

Metal-on-metal bearings, popular two decades ago, are no longer used routinely because of issues with metal-ion release.

The day of surgery and the first week

Most modern hip replacements are performed under spinal anaesthesia with light sedation. The operation takes 60–90 minutes. Patients are out of bed within hours and walking with a frame the same day. The typical hospital stay is two to four nights.

At home, the focus of the first week is graded walking, exercises to regain hip range and strength, and reasonable precautions to protect the new joint while soft tissues heal.

The recovery roadmap

Most patients use a walker or two crutches for the first two weeks, transition to one crutch or a stick for another two weeks, and walk unaided by week four to six. Office work resumes at 4–6 weeks; driving at 6 weeks. Most patients are walking comfortably for distances by 6–8 weeks, climbing stairs normally by 8–10 weeks, and back to nearly all daily activities by three months. Subtle gains in stamina and natural gait continue for the first year.

Long-term outcomes

Modern hip replacements have excellent long-term survival. Joint registry data shows that more than 90% of implants are still functioning well at 20 years; many last 25 years or more. Revision surgery rates are well under 5% at a decade. Patient-reported satisfaction is among the highest of any orthopedic procedure.

Risks — discussed openly

Hip replacement is a safe operation, but no surgery is without risk. Serious complications are uncommon and most are preventable:

• Infection — under 1% in modern units, reduced by careful technique and antibiotic protocols.
• Blood clots — under 1% with early mobilisation and chemical prophylaxis.
• Dislocation — historically 2–5%, now under 1% with modern technique and patient education.
• Leg length discrepancy — small differences are common and rarely noticeable; significant differences are rare with careful planning.
• Long-term implant loosening — 5% or less at 20 years with modern bearings.

Returning to the activities you love

After a successful hip replacement, almost all patients return to walking unlimited distances, hiking, swimming, cycling, golf, doubles tennis, dancing, and travel. Many return to yoga and Pilates with sensible modifications. High-impact running and contact sport are not encouraged because they shorten implant life. The single biggest source of patient satisfaction is the return of restful sleep and the disappearance of the constant background ache that characterises end-stage hip arthritis.