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Table 4 Radiographic outcomes in double-level ACDF

From: Using a mixture of local bone dust and morselized bone as graft materials in single- and double-level ACDF

Variables Group A (n = 60) Group B (n = 59) P value
Fusion rate
 3 months follow-up    0.03
 No fusion 53 39  
 One-level fusion 4 9  
 Two-level fusion 3 11  
 6 months follow-up    0.01
 No fusion 37 21  
 One-level fusion 11 15  
 Two-level fusion 12 23  
 1 year follow-up    0.048
 No fusion 15 6  
 One-level fusion 20 17  
 Two-level fusion 25 36  
 Final follow-up    0.46
 No fusion 3 1  
 One-level fusion 5 3  
 Two-level fusion 52 55  
FSH (mm)
 Preoperative 49.1 ± 4.5 48.9 ± 4.2 0.80
 Postoperative 53.4 ± 4.9 52.7 ± 4.0 0.40
 1 year follow-up 51.2 ± 4.1 51.0 ± 3.7 0.78
 Final follow-up 50.5 ± 3.8 50.4 ± 3.6 0.88
Subsidence (mm) 2.9 ± 1.4 2.3 ± 0.8 0.01
Subsidence rate 17/60 10/59 0.14
C2-7 lordosis (°)
 Preoperative 12.9 ± 10.8 11.0 ± 12.4 0.37
 Postoperative 19.1 ± 11.5 18.4 ± 11.9 0.75
 1 year follow-up 17.3 ± 13.4 16.9 ± 12.7 0.87
 Final follow-up 15.4 ± 10.8 17.2 ± 12.4 0.40
SSA (°)
 Preoperative 4.2 ± 5.4 3.9 ± 6.1 0.78
 Postoperative 10.7 ± 6.1 9.3 ± 7.0 0.26
 1 year follow-up 9.2 ± 5.3 8.6 ± 6.5 0.58
 Final follow-up 8.5 ± 4.9 8.2 ± 5.7 0.76
  1. FSH Fusion segmental height, SSA Segmental sagittal alignment