What should you know about patellofemoral partial knee replacement?

The patellofemoral compartment is the area where the kneecap glides over the end of the thighbone. If damage is confined there, a surgeon may remove the worn surfaces and place a metal component on the thighbone with a smooth plastic surface behind the kneecap. Cobalt-chrome alloy and highly cross-linked polyethylene are examples of materials used in joint implants. The other knee compartments and major ligaments are assessed because a partial replacement is designed for selected patterns of damage, not every type of knee arthritis.

Before surgery, discuss medicines, dental or skin infections, smoking, home support, and how you will manage stairs. Afterward, early movement and physiotherapy help restore knee motion, thigh strength, walking control, and confidence. Use the wound and activity instructions from your surgical team; swelling and stiffness can fluctuate during recovery. A partial replacement may be considered instead of a total replacement when the remaining compartments are healthy, but the choice depends on examination and imaging.

Contact the surgical team promptly for increasing wound redness, drainage, feverish illness, worsening calf pain or swelling, or pain that suddenly changes. Seek emergency help for chest pain, severe breathlessness, fainting, or a cold, numb foot. A new inability to put weight through the leg also warrants prompt review.

Ask which knee compartments are affected, whether the ligaments are suitable for a partial replacement, and why it fits your goals. Discuss implant materials, expected movement, alternatives such as total knee replacement, driving, work, exercise, and the rehabilitation milestones used at follow-up.