| Objective To investigate the efficacy of the modified eggshell scraping technique for ankylosed hip in the acetabular side reconstruction of total hip arthroplasty.Methods From March 2016 to March 2021, 34 ankylosed hip patients (44 hips) were admitted to Jingmen Central Hospital, including 22 males and 12 females, aged from 27 to 66 years, with an average age of (49.2±9.2) years. There were 10 patients with ankylosing spondylitis, 5 with rheumatoid arthritis, 13 after trauma and surgery, 5 with osteoarthritis, and 1 with ankylosing hip after infection. Biological artificial total hip replacement was performed, and a modified eggshell curettage technique was used to locate and reconstruct the acetabulum. Hip Harris score was performed at each preoperative and postoperative follow-up period, the vertical distance from the center of rotation and anatomical acetabular reconstruction to the horizontal line of the sciatic nodules was measured. And the horizontal distance from the reconstructed rotation center and the anatomical rotation center to the midline of the combined pubis bone was also measured. The Harris score of the hip joint one year after surgery was performed to evaluate the hip function. The accuracy of the acetabular prosthesis was compared between the reconstructed and anatomical rotation centers.Results All 34 patients were followed up, without complications such as vascular nerve injury, infection, thrombosis, dislocation, or fracture. The follow-up time was 12 to 72 months, with an average of 38.03 months. The Harris functional score was increased from (36.56±7.31) scores before operation to (80.74±4.22) scores one year after operation, with a significant difference (P<0.05). The vertical and horizontal distances of the hip reconstruction rotation center were (78.38±8.58) mm and (96.86±9.48) mm, respectively, the vertical and horizontal distances of the rotation center of the hip anatomy were (77.78±7.63) mm and (98.38±10.62) mm. The vertical distances of the hip anatomy rotation center and the hip reconstruction rotation center were compared (P>0.05). This showed that the vertical distance of the reconstructed center of rotation was not significantly different from the vertical distance of the anatomical center of rotation. The horizontal distances of the hip anatomy rotation center and the hip reconstruction rotation center were compared (P>0.05). This showed that the horizontal distance of the reconstructed rotation center was not significantly different from the horizontal distance of the anatomical center of rotation. Comprehensive evaluation of the reconstructed acetabular component was well positioned.Conclusion The modified eggshell scraping technique can effectively avoid intraoperative acetabular grinding, reduce intraoperative perspective times, and accurately locate and reconstruct the acetabular in situ. |
