Objective The objective of this study is to retrospectively analyze on radiographs and function of the hips in children with open triradiate cartilage, who received PAO. Materials and Methods From October 2013 to August 2021, 31 children underwent PAO, and 14 underwent PAO combined with proximal femoral osteotomy. The average age was 9.9± 1.6 years, including 7 males and 24 females. The etiology distribution was DDH in 27 cases, femoral head epiphyseal dysplasia in 1 cases, Legg-Calve-Perthes disease in 2 cases, and congenital coxa vara in 1 cases. The average follow-up was 6.7 ± 2.2years (range, 4 to 10 years). Postoperative hip joint imaging (lateral center-edge angle, LCEA; acetabular index, AI; femoral head coverage, FHC) was observed, and hip joint function(Modified Harris hip score, mHHS and International Hip Outcome Tool-12, iHOT-12) was evaluated. Results Imaging assessment showed that LCEA increased from an average of 13.5°± 8.2° (−16° to 27°) preoperatively to 26.7°± 4.7° (23° to 34.6°) at the last follow-up (p < 0.001). FHC increased from an average of 31.8%± 16.4% preoperatively to 84.2%± 12.6% (p < 0.001). mHHS increased from an average of 60.2± 12.7 preoperatively to 88.2± 8.4 at the last follow-up (p < 0.001). iHOT-12 improved from 56.1± 13.4 preoperatively to 89.1± 10.3(p < 0.001). No postoperative hip subluxation was observed in this group of cases. Conclusion PAO in patients no younger than 6 years with open triradiate cartilage does not affect the later development of the acetabulum. However, precise surgical technique is crucial. Key words: open triradiate cartilage, developmental dysplasia of the hip (DDH), periacetabular osteotomy
Chen et al. (Thu,) studied this question.