Understanding Knee Arthroplasty (partial or total knee replacement)
Knee arthroplasty, commonly known as knee replacement surgery, involves removing damaged or worn parts of the knee joint and replacing them with artificial components (prosthetics). The procedure can be either total knee replacement (TKR)—where the entire joint is resurfaced—or partial knee replacement (PKR)—where only the damaged compartment is treated.
This surgery is most often performed to relieve severe pain and stiffness caused by advanced osteoarthritis, rheumatoid arthritis, or traumatic joint damage. When conservative treatments such as medications, injections, or physical therapy no longer provide relief, knee arthroplasty becomes a highly effective solution.
Treatment of Knee Arthroplasty (partial or total knee replacement)
Surgical Procedure:
Performed under general or spinal anesthesia.
The surgeon removes the damaged cartilage and bone from the femur, tibia, and sometimes the patella.
Metal and plastic implants are positioned to recreate the surface of the knee joint.
In a partial knee replacement, only the affected portion (medial, lateral, or patellofemoral compartment) is replaced.
The surgery typically takes 1–2 hours and may require a short hospital stay or be done as outpatient surgery depending on the patient’s health and surgical approach.
Recovery From Knee Arthroplasty (partial or total knee replacement)
Immediate Post-Op Phase:
Most patients begin walking with assistance (walker or crutches) the same day or next day after surgery.
Pain and swelling are managed with medications, ice, and elevation.
A knee brace or compression may be used to support healing.
Rehabilitation:
Physical therapy begins early to improve range of motion and prevent stiffness.
Most patients regain significant mobility within 6 weeks and continue strengthening exercises for several months.
Driving can typically resume after 4–6 weeks, depending on the leg operated and progress.
Full Recovery:
Recovery time varies but full healing and optimal function may take 3 to 6 months.
Patients typically experience a dramatic improvement in pain, mobility, and quality of life.
Knee replacements can last 15–20 years or more, especially with regular low-impact activity and weight management.