Abstract: BACKGROUND: Total hip arthroplasty is an effective method for the treatment of hip joint diseases such as femoral head necrosis and femoral neck fracture. The choice of prosthetic interface materials during the operation is the most important factor affecting the survival rate of the prosthesis.   
OBJECTIVE: To compare the postoperative efficacy of ceramic on ceramic hip prosthesis and ceramic on polyethylene hip prosthesis in elderly patients of total hip arthroplasty. 
METHODS: Sixty patients with femoral neck fracture and aseptic necrosis of the femoral head, who were treated in the Subei People’s Hospital of Jiangsu Province from February 2017 to February 2018, aged ≥ 45 years old, were selected in this study. Among them, 22 were treated with ceramic on ceramic hip prosthesis and 38 were treated with the ceramic on polyethylene hip prosthesis. At 1 week, 1, 3, 6, and 12 months after surgery, hip joint function scores and complications were counted. The trial was approved by the Ethics Committee of Subei People’s Hospital of Jiangsu Province (approval No. 2019112).  
RESULTS AND CONCLUSION: (1) There was no significant difference in hip function scores between the two groups at different time points after surgery (P > 0.05). (2) There were two cases of joint noise in the ceramic on ceramic group and one case of peripheral nerve injury in the ceramic on polyethylene group. There was no significant difference in the incidence of joint noise and peripheral nerve injury between the two groups (P > 0.05). (3) The results showed that both the ceramic on ceramic and ceramic on polyethylene hip prosthesis can provide good curative effect and hip function reconstruction after total hip arthroplasty, and there was no significant difference in the incidence of postoperative complications between the two groups.  

Key words: bone, prosthesis, femoral head necrosis, femoral neck fracture, total hip arthroplasty, ceramics, polyethylene, artificial hip prosthesis, orthopedic implants, postoperative efficacy