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Other conditions, such as rheumatoid arthritis (a chronic inflammatory disease that causes joint pain, stiffness, and swelling), avascular necrosis (loss of bone caused by insufficient blood supply), injury, and bone tumors also may lead to breakdown of the hip joint and the need for hip replacement surgery.
The purpose of total hip replacement is to remove the two damaged and worn parts of the hip joint- the hip socket (acetabulum) and the ball (femoral head) â and replace them with smooth, artificial implants called prostheses, which help make the hip strong, stable, and flexible again.