Clinically, hip dislocation surgery is rarely performed because of the fear of the potential risk of destruction of the blood supply to the femoral head. Based on anatomical studies of the blood supply to the femoral head, Professor Ganz et al. first reported an approach to surgical dislocation of the hip in 2001, proposing the following surgical principles for surgical dislocation of the hip: (1) The blood supply to the femoral head comes mainly from the deep branches of the internal rotor femoral artery. (2) When the hip is dislocated, the blood vessels are protected by the intact external foramen ovale muscle. (3) With the application of rotor reversal osteotomy, the hip joint can be exposed anteriorly, and this approach can be used for joint subluxation and dislocation when needed, while taking care to maintain the integrity of the external rotator muscle group. (4) A gap of at least 11 cm can be created between the femoral head and the acetabulum, providing an approximately 360-degree view of the femoral head as well as a complete view of the acetabulum. Clinical and related experimental studies have confirmed that surgical dislocation of the hip is a safe method that can fully visualize the hip joint. Significance of Surgical Dislocation of the Hip Surgical dislocation of the hip is particularly important for the diagnosis and treatment of intracapsular lesions of the hip. Fewer imaging techniques are available to diagnose acetabular labral injuries and femoral head acetabular articular cartilage injuries. Anterosuperior injuries of the acetabulum are frequently missed and are often seen only intraoperatively. Recent developments in magnetic resonance imaging have allowed for better preoperative evaluation of many of these injuries. However, extensive glenoid labral rupture, accompanied by articular cartilage free from the subchondral bone, is difficult to assess. Without surgical dislocation, it is difficult to identify the underlying lesion. Advantages of the surgical approach to hip dislocation The lateral approach facilitates protection of the gluteus medius and lateral femoral muscles without severing the external rotator muscle groups, which can easily dislocate the hip using the classic rotor osteotomy or using a V-shaped myofascial flap. Both provide a good view of the femoral head and acetabulum. Complications of surgical dislocation of the hip Ischemic necrosis of the femoral head is the most significant complication of traumatic dislocation of the hip. Traumatic posterior dislocations result in higher rates of ischemic necrosis than anterior dislocations. However, surgical dislocation of the hip has established a controlled and less invasive anterior dislocation procedure. The duration of dislocation is less than 6 h (6 h after traumatic dislocation is considered to be the decisive time frame). All external rotator muscle groups were preserved intact, protecting the internal rotator femoral artery. Intraoperative monitoring of femoral perfusion is necessary. The most effective method to assess postoperative femoral perfusion is MRI, but it is difficult to use as a routine screening test. Femoral head necrosis usually appears abnormal on plain radiographs within 1 year. Traumatic dislocations do not show radiographic manifestations of necrosis until 2-5 years after the injury. Follow-up of surgical dislocations of the hip at 2-7 years has shown that no manifestations of femoral head necrosis have been observed. Although some investigators have also reported good results in using arthroscopy to diagnose and treat intra-articular lesions such as: glenoid labral rupture, free bodies, and early osteoarthritis, the technique is often difficult. Assessment of hip motion while hip cleaning is not possible. Complications such as nerve traction palsy, pressure sores of the foot or perineum, and medically induced damage to the articular cartilage limit the use of arthroscopic manipulation. The hip surgical dislocation technique allows an almost 360° view of the femoral head and complete acetabular extent, allowing intra-articular surgical manipulation to be performed safely without the limitations and difficulties inherent in hip arthroscopy and arthrotomy without dislocation. Medically induced damage to the articular cartilage surfaces of the femoral head and acetabulum is minimized. More importantly, it is a procedure that allows for the complete preservation of the hip joint, setting the stage for future follow-up treatments such as cartilage transplantation.