For a patient, total hip arthroplasty with an anterior approach, he or she will get the following benefits: 1. Shortened hospital stay and rapid postoperative recovery. 2, Although the surgical field of view is smaller and narrower than the posterior approach, the surgery is less traumatic, less bleeding, and the postoperative pain is significantly reduced because the surgery enters the hip joint through the intermuscular space and from the junction area of different innervations. 3, The surgery does not damage the gluteus medius and hip external rotation muscles, compared with other hip surgical approaches, the direct anterior approach can truly enter the hip joint in the muscle space for surgical operation. The recovery of muscle strength around the hip joint in the early postoperative period is not affected by the surgery. The caveat of early restrictive activities such as inability to flex the hip 90 degrees in the posterior approach can be followed without the anterior approach after surgery. This is particularly useful in patients with Alzheimer’s who say they will forget. The function of internal and external rotation of the hip joint is significantly better in patients with anterior approach than in patients with posterior approach. 4.The posterior hip joint capsule is not destroyed during surgery, so there is no need to excessively restrict the joint range of motion of the hip joint after surgery, and the chance of posterior joint detachment after surgery is reduced. 5.The anterior approach is to operate in the lateral position (the posterior approach is to operate in the lateral position), which is very convenient for anesthesia operation and does not affect the cardiopulmonary function (one of my patients was injured in a car accident, which caused the femoral neck bone to be concurrent with the contralateral rib fracture and could not be operated in the lateral position, while the rib fracture would not be affected by the operation in the lateral position). The flat position makes it easier to accurately grasp the position of the prosthesis through fluoroscopy during the surgery, so that the position can be truly precise. It is also easier to measure the length of both lower extremities in the horizontal position to minimize errors. For patients who have bilateral surgery at the same time, the flat position can avoid intraoperative turning, shorten the operation time and reduce the chance of infection. So, what kind of patients cannot have anterior approach surgery? Theoretically, except for severe hip deformity and complex revision surgery, all patients can receive anterior approach surgery. However, anterior approach surgery will delay the operation and increase the risk of anesthesia and other risks in the following patients: overly strong male patients, obese patients, patients with severe osteoporosis, patients with relatively short femoral neck of hip inversion, patients with severe hip dysplasia, patients with severe bone defects, and patients with ankylosis of the hip joint.