Percutaneous Pedicle Screw Fixation with Polymethylmethacrylate Augmentation for the Treatment of Thoracolumbar Intravertebral Pseudoarthrosis Associated with Kummell’s Osteonecrosis

Table 2

Comparison of mean difference in compression ratio and kyphotic angle.

	PPF group	PVP group
Number of patients	18	31
The mean difference of AP ratio	0.04 ± 0.03	0.18 ± 0.08
The mean difference of kyphotic angle	1.65 ± 1.22	6.06 ± 3.38
VAS at postoperative 24 months	2.67 ± 1.03	3.71 ± 1.27
ODI at postoperative 24 months	28.00 ± 5.47	37.77 ± 11.49

⁢.