Femoral head necrosis is a common clinical orthopedic disease, mostly occurring in young adults. However, with the increasing popularity of artificial hip arthroplasty, the expansion of surgical indications, and the broadening of the age spectrum of those who undergo surgery, complications such as loosening of the prosthesis, sinking, dislocation, stem fracture and femoral fracture occur during long-term follow-up, and the number of cases requiring revision and replacement of longer and larger stemmed artificial joints is gradually increasing. The number of cases requiring revision and replacement of longer and larger stemmed artificial joints is increasing, and artificial joint revision is facing a serious challenge. How to reduce the complications of artificial hip arthroplasty, prevent the increase of revision and make it easy to revise has become a new topic. In our department, we applied sessile total hip arthroplasty for the treatment of femoral head necrosis in young adults and obtained good clinical results. The sessile artificial hip replacement preserves the femoral neck, thus preserving as much of the anatomical structure of the proximal femur in its natural state as possible, and the mechanical conduction and distribution of the proximal femur after surgery is closer to the natural biomechanical state of the human body. Clinical follow-up data show that approximately 62.3% of stemmed artificial hip replacements experience bone loss due to stress masking [3], whereas the bone density of the femoral neck increases after stemless hip replacements. Preserving the femoral neck is equivalent to preserving the intact structure and function of the proximal femur, which prevents the occurrence of stress masking. Without stress masking, local osteolysis is reduced and the possibility of complications such as prosthesis loosening, sinking, fracture and femoral stem fracture is greatly reduced. Sessile total hip arthroplasty basically adopts non-cemented fixation, which relies on the close anastomosis between the hood and the femoral neck to form a tight compression fit. The inner surface of the hood matches the external shape of the proximal femoral neck and forms a three-point support with the greater and lesser trochanter, and a large amount of new bone can grow outside the hood in the window of the hood to achieve early mechanical fixation and later biological fixation. The surgical operation of the sessile total hip joint does not expand the medulla, and intraoperative bleeding is significantly reduced, and postoperative complications such as intra-medullary infection and thigh pain caused by the prosthetic stem of the sessile joint can be avoided. Since the femoral neck is preserved and the medullary cavity of the femoral stem is not damaged, the secondary revision surgery can still be performed with an inserted artificial hip prosthesis, thus making the revision surgery significantly simpler and more convenient, almost like the initial replacement. The majority of patients with femoral head necrosis occur in young and middle-aged people, who are physically active at this age, and the wear and tear on the prosthesis increases accordingly, so it is very necessary to consider the revision of the prosthesis. Through the clinical observation of this group, there was no 1 case of complications such as sinking, loosening, fracture and femoral stem fracture, which obviously reduced the incidence of complications after artificial joint replacement.