Hip prostheses are artificial devices used to replace damaged or worn-out parts of the hip joint. They are commonly used in procedures like hip replacement surgery to alleviate pain and restore mobility in patients suffering from conditions such as osteoarthritis or rheumatoid arthritis. The prosthesis typically consists of a metal stem, a ball, and a socket, designed to mimic the natural movement of the hip. These devices can be made from various materials, including metal alloys, ceramics, and plastic. The choice of materials affects the prosthesis's durability and compatibility with the body. After surgery, patients usually undergo rehabilitation to regain strength and improve their range of motion.