Why Hips Fail: Causes of Hip Joint Disease

The hip is a ball-and-socket joint — the rounded head of the femur (thigh bone) fits into the acetabulum (socket) of the pelvis. Like the knee, the joint surfaces are covered with smooth articular cartilage. When this cartilage breaks down, the result is pain, stiffness, and eventually inability to walk.

Hip replacement is one of the most successful operations in modern medicine. Over 2 million hip replacements are performed worldwide every year, with 95%+ of patients reporting significant pain relief and improved mobility.

• Osteoarthritis — the most common cause; cartilage wears away over decades
• Avascular necrosis (AVN) — blood supply to the femoral head is cut off, causing the bone to collapse; common in younger patients, often linked to steroid use, alcohol, or sickle cell disease
• Rheumatoid arthritis — autoimmune inflammation destroys the joint
• Hip fracture — a broken hip (especially in the elderly) often requires hip replacement
• Developmental dysplasia of the hip (DDH) — abnormal hip development from birth leads to early arthritis
• Paget's disease — abnormal bone remodelling causing deformity
• Childhood hip conditions — Perthes disease or slipped capital femoral epiphysis (SCFE) causing early arthritis

Signs You May Need Hip Replacement

Hip arthritis pain is typically felt in the groin, the front of the thigh, or the buttock. It is often confused with back pain or sciatica. The pain is usually worse with activity and improves with rest — until the disease is advanced, when it occurs even at rest and at night.

• Deep groin pain or pain in the front of the thigh that worsens with walking
• Stiffness — difficulty putting on shoes and socks, or getting in and out of a car
• Limping — the body compensates for hip pain by shifting weight to the other side
• Leg length discrepancy — the affected leg may appear shorter due to joint collapse
• Clicking, grinding, or locking sensation in the hip
• Pain that wakes you at night
• Inability to walk more than 15–20 minutes without significant pain

The Hip Replacement Operation

In a total hip replacement (THR), the damaged femoral head and the worn acetabular socket are both replaced with prosthetic components. The femoral component is a metal stem inserted into the thigh bone with a metal or ceramic ball on top. The acetabular component is a metal cup with a plastic or ceramic liner.

Modern implants are designed to last 20–25 years. India uses the same implant brands as the USA and UK — Zimmer Biomet, Stryker, DePuy — at a fraction of the cost.

• Posterior approach: the most common; the hip is accessed from the back
• Anterior approach (minimally invasive): accessed from the front; faster recovery, less muscle damage
• Robotic-assisted hip replacement: CT-based planning for precise cup positioning
• Cemented vs. cementless fixation: cementless (press-fit) implants are preferred for younger, active patients
• Ceramic-on-ceramic bearings: the most durable option for younger patients; virtually no wear
• Revision hip replacement: replacement of a failed or worn-out hip implant

Recovery and Long-Term Outcomes

Hip replacement has one of the highest patient satisfaction rates of any surgical procedure — over 90% of patients report being very satisfied with the outcome. Most patients are walking the day after surgery and are discharged within 3–5 days.

Overseas patients can typically fly home 10–14 days after surgery. Full recovery — including return to normal walking and most activities — takes 6–12 weeks.

• Day 1: walking with a frame; physiotherapy begins
• Day 3–5: hospital discharge; walking with crutches
• Week 2: overseas patients fly home
• Week 6: walking without a stick for most patients
• Month 3: return to driving and most daily activities
• Month 6: return to low-impact sports (swimming, cycling)
• Avoid high-impact activities (running, jumping) to protect the implant