Partial knee replacement, also called unicompartmental knee replacement, is a minimally invasive surgical procedure used to treat arthritis or damage that is limited to one compartment of the knee.
Unlike total knee replacement, which replaces the damaged surfaces throughout the knee, partial knee replacement preserves the healthy portions of the joint. The damaged area is replaced with an artificial implant designed to restore smoother knee movement and reduce pain.
Who May Benefit From Partial Knee Replacement?
Partial knee replacement may be considered for people who have:
Osteoarthritis affecting primarily one compartment of the knee
Persistent knee pain despite medication, physiotherapy, activity modification, or other nonsurgical treatments
Localized cartilage damage or wear
Good knee stability and adequate ligament function
Sufficiently preserved cartilage and bone in the other parts of the knee
A thorough evaluation, including a physical examination and appropriate imaging, is necessary to determine whether partial knee replacement is suitable.
Benefits of Partial Knee Replacement
For appropriately selected patients, potential benefits may include:
Relief from chronic knee pain
Improved mobility and daily function
Preservation of healthy bone and cartilage
Preservation of more natural knee anatomy
Smaller surgical exposure compared with many total knee replacement procedures
Potentially faster early recovery in some patients
Results vary from person to person, and partial knee replacement is not appropriate for every type of knee arthritis.
Partial vs. Total Knee Replacement
The main difference is how much of the knee joint is replaced.
Partial knee replacement: Only the damaged compartment is replaced, while the remaining healthy parts of the knee are preserved.
Total knee replacement: The damaged surfaces of the knee's major compartments are replaced with artificial components.
The choice between the two procedures depends on the location and extent of arthritis, ligament condition, knee alignment, age, activity level, and other individual factors.
Consider consulting an orthopedic specialist if knee pain, stiffness, or reduced mobility is interfering with your work, sleep, exercise, or everyday activities and has not improved with conservative treatment.
A specialist can assess the condition of your knee and discuss appropriate treatment options, which may or may not include partial knee replacement.
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