To be honest i was surprised to learn that knee cap or patellar pain is a common complication of knee replacement.
Plastic knee cap replacement.
An artificial knee joint has metal alloy caps for your thighbone and shinbone and high density plastic to replace damaged cartilage.
Fortunately knee replacement surgery a procedure that replaces the worn out joint with a metal and plastic joint is very successful at relieving pain and improving function.
To understand this surgical procedure we have to understand knee anatomy first.
If you see lower end of femur it has a groove for patella called patellofemoral groove.
Knee cap replacement is a type of partial knee replacement surgery in which only patellofemoral articulation is replaced with implants.
The study authors found that in about 1 4 of the knee replacement patients with chronic knee cap pain blood flow in the knee cap area markedly decreased with flexing the knee.
However many people who have only limited arthritis of the knee are concerned about replacing the entire joint.