In human life, various joint diseases are caused by various reasons: joint pain and dysfunction. The hip joint is one of the more commonly affected joints. It causes joint pain, difficulty in walking, and even loss of ability to live. Total hip replacement is a boon for these patients. After total hip arthroplasty, joint pain disappears and joint function is restored. 1.What is the artificial total hip joint made of? The artificial total hip joint is generally made of non-toxic metal (cobalt-chromium-molybdenum alloy or titanium alloy) and ultra-high polymer polyethylene-based (plastic) according to the anatomical characteristics of human joints, imitating the function of the joint design only manufacturing. It is implanted into the human body to play the role of the original hip joint. 2.What diseases require artificial total hip joint replacement? Severe pain and limited movement of the hip joint due to various reasons. Patients whose life and work are affected should consider total hip replacement. Common diseases include rheumatoid arthritis, ankylosing crestitis, advanced aseptic necrosis of the femoral head and femoral neck fracture in the elderly, congenital acetabular dysplasia, secondary hip arthritis, etc. 3. Patients who choose surgery must meet the following three criteria: (1) X-ray changes of joint destruction; (2) moderate to severe persistent pain; (3) no substantial improvement by long-term conservative treatment. Conservative treatment includes: pain relievers or NSAIDs, physical therapy, mobility aids (crutches), and conscious reduction of physical activity that may cause discomfort.