Fig. 2

Typical cases of two groups in the follow-up. A A 16-year-old girl of Lenke type 1 AIS without Ponte osteotomy. Preoperative coronal Cobb angle of the PT, MT, and TL/L was 23.46°, 47.91°, and 25.46°, respectively. Preoperative sagittal Cobb angle of the CSA, TK, and LL was 10.62°, 2.76°, and − 41.83°, respectively. 2-year postoperative coronal Cobb angle of the PT, MT, and TL/L was 13.24°, 18.05°, and 9.77°, respectively. 2-year postoperative sagittal Cobb angle of the CSA, TK, and LL was 6.16°, 16.97°, and − 34.51°, respectively. B A 15-year-old girl of Lenke type 1 AIS with Ponte osteotomy. Preoperative coronal Cobb angle of the PT, MT, and TL/L was 21.75°, 43.43°, and 19.88°, respectively. Preoperative sagittal Cobb angle of the CSA, TK, and LL was 10.53°, 4.42°, and − 41.37°, respectively. 2-year postoperative coronal Cobb angle of the PT, MT, and TL/L was 11.74°, 13.65°, and 2.24°, respectively. 2-year postoperative sagittal Cobb angle of the CSA, TK, and LL was 8.07°, 24.96°, and − 47.04°, respectively