In knee osteoarthritis, the smooth cartilage that covers the ends of the bones wears away until bone rubs on bone. In a knee replacement, the damaged surfaces are removed and covered with precisely sized metal components, with a smooth medical-grade plastic insert between them. If only one compartment of the knee is worn, a partial replacement may be possible.
When is it needed?
- Advanced knee osteoarthritis
- Rheumatoid and inflammatory arthritis
- Arthritis after an old fracture or ligament injury
- Bow-legged or knock-kneed deformity with arthritis
- Severe pain at night or at rest
How it is done
- 1Assessment
Standing X-rays and examination confirm that a replacement is the right step, and the implant size is planned.
- 2Resurfacing
Worn cartilage and a thin layer of bone are removed, and the implants are fitted and aligned.
- 3Walking the next day
Most patients stand and walk with support the day after surgery.
- 4Rehabilitation
Physiotherapy rebuilds bending, straightening and muscle strength.
Advantages
- Lasting pain relief for most patients
- Correction of leg alignment
- Return to walking, prayer positions as advised, and daily activities
- Modern implants that last many years
Recovery
- Days 1–4Walking with a frame and exercises in hospital.
- Weeks 2–6Moving to a stick and regaining bend.
- Months 3Most daily activities without aids.
Common questions
Am I too young or too old?
Age alone is not the deciding factor. The decision depends on pain, X-ray findings and how much the knee limits your life.
How long does a knee replacement last?
Most modern knee replacements are still working well 15–20 years later.
Will I be able to kneel or pray on the floor?
Many patients can, but deep kneeling varies from person to person. We discuss your expectations before surgery.
This information is general and does not replace a medical consultation. Every case is assessed individually.
