Objective To evaluate the efficacy of the Zweymüller uncemented prosthesis in the mid-term follow-up after primary hip replacement, and to summarize the related problems during the follow-up process. Methods A total of 100 patients (108 hips) who underwent Zweymüller uncemented total hip arthroplasty from January 2006 to January 2009 were enrolled according to the inclusion criteria. The follow-up was based on outpatient visits, combining telephone follow-up and home follow-up. At the last follow-up, 59 patients (64 hips) were followed up and completed follow-up data, with an average follow-up of 9.2 years (8 to 10 years). Clinical and imaging evaluations were performed on complete follow-up data. The clinical evaluation included preoperative and postoperative Harris scores and postoperative complications. The imaging evaluation included observation and analysis of the patients who underwent the last follow-up review and those who were reviewed within 1 week after surgery, and the pelvic anterior segment (compared to the bilateral hips), and the positive lateral radiograph of the hip joint, according to imaging evaluation results to assess the position of the prosthesis, analysis of the existence of translucent bands around the prosthesis, whether osteolysis occurs, whether the prosthesis is aseptic loosening, stress shielding of the proximal femur and ectopic ossification. Results The final follow-up rate was 59%. The Harris score increased from an average of 46.30±10.06 points (17-61 points) before surgery to an average of 91.20±5.14 points (75-100 points) at the last follow-up. The excellent and good rate was 87.5%. Postoperative complications. The incidence rate was 23.7%, including hip pain (1 hip), prosthesis dislocation (1 hip), deep vein thrombosis (1 hip), claudication (5 cases), and limb length unequal 10 mm above (6 cases); the retention rate of femoral stem and spiral cup prosthesis were 100%; the incidence of translucent band was 12.5%, all of which were regional translucent bands; the incidence of osteolysis was 4.7%; the proximal femoral stress occlusion rate was 61%; heterotopic ossification rate was 17.2%. Conclusion Through the follow-up of 8 to 10 years of postoperative cases in this group, the mid-term follow-up results of Zweymüller uncemented total hip arthroplasty are satisfactory. |