Short-Segment Instrumentation with Fractured Vertebrae Augmentation by Screws and Bone Substitute for Thoracolumbar Unstable Burst Fractures

Table 3

Radiographic data of surgery.

Parameter	Study (N = 20)	Control (N = 22)	values
Failure rate	0/20 (0%)	1/22 (4.5%)	1.000
Preoperative canal encroachment (%)	52.2 ± 17.0	52.7 ± 13.9	0.772
Local kyphosis (degree)
Preoperative	20.2 ± 6.1	21.3 ± 6.9	0.529
Postoperative	6.8 ± 4.6	9.4 ± 5.5	0.170
Final	9.6 ± 4.6	12.6 ± 6.3	0.107
Correction by surgery	13.4 ± 5.0	11.9 ± 5.8	0.212
Loss of correction at final	2.9 ± 2.6	3.2 ± 2.8	0.821
Preoperative vs. Postoperative	p < 0.001	p < 0.001
Postoperative vs. Final	p < 0.001	p < 0.001
Preoperative vs. Final	p < 0.001	p < 0.001
Anterior body height (%)
Preoperative	51.6 ± 10.3	56.5 ± 12.8	0.092
Postoperative	86.3 ± 10.9	85.9 ± 12.6	0.669
Final	78.3 ± 12.8	78.0 ± 10.7	0.960
Correction by surgery	34.7 ± 11.4	31.0 ± 22.6	0.326
Loss of correction at final	8.0 ± 5.4	8.0 ± 8.3	0.279
Preoperaitve vs. Postoperative	p < 0.001	p < 0.001
Postoperative vs. Final	p < 0.001	p < 0.001
Preoperaitve vs. Final	p < 0.001	p < 0.001
Load sharing score
6	7	7	0.628
7	10	9
8	3	5
9	0	1