For hip disorders such as end-stage hip osteoarthritis, femoral head necrosis, rheumatoid arthritis, ankylosing spondylitis and displaced femoral neck fractures, total hip replacement surgery is a very effective treatment that can significantly relieve pain, improve function and enable patients to return to normal work and life. Because of its efficacy and cost-effectiveness, total hip replacement surgery has been named one of the most successful procedures of the 21st century. However, the disadvantage of conventional total hip surgery is that it is more traumatic and the patient has a longer recovery time. Due to the large number of muscles that have to be incised and stripped, the patient will have wound pain, decreased muscle strength of the affected limb and limpness for several months after surgery.