The hip prosthesis is a major surgical technique involves the replacement of degenerate artificial hip joint. The characteristics of the materials used in this type of prosthesis allow similar to human joint mobility. To manufacture these implants used: various metals such as stainless steel alloys, cobalt, chromium and titanium; plastic, usually polyethylene, a durable and wear-resistant material which is friction. The replacement of the hip prosthesis is indicated in cases of osteoarthritis in the joint or of rheumatoid arthritis. After surgery, patients need crutches for the next month. The prostheses have limited life due to wear of materials.