Table 4 Comparison of imaging measurement results before and 12 months after operation between the two groups (Mean ± SD)

ACJ gap (mm)

Preoperative

8.40 ± 2.61

9.43 ± 3.16

0.185

Postoperative 3 days

4.27 ± 1.51

4.40 ± 1.19

0.726

Postoperative 3 months

2.96 ± 1.27

2.43 ± 1.24

0.122

Postoperative 6 months

2.86 ± 0.91

2.42 ± 0.89

0.075

Postoperative 12 months

2.45 ± 0.49

2.14 ± 0.43

0.018

P

< 0.001

< 0.001

CCJ distance (mm)

Preoperative

14.03 ± 4.12

14.72 ± 3.44

0.507

Postoperative 3 days

6.26 ± 2.55

6.43 ± 3.06

0.818

Postoperative 3 months

4.22 ± 2.09

3.99 ± 2.29

0.696

Postoperative 6 months

3.99 ± 1.42

3.40 ± 1.20

0.107

Postoperative 12 months

3.12 ± 0.78

2.50 ± 0.58

0.002

P

< 0.001

< 0.001