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Table 1 Clinical data of 13 patients

From: Motion-preserving treatment of unstable atlas fracture: transoral anterior C1-ring osteosynthesis using a laminoplasty plate

Case Injury cause Fracture characteristics LMD (pre) LMD (post) VAS (pre) VAS (post) Axial ROM after surgery (°) Bone union confirmed (month) Follow-up (month) Complication
1 MVA Single AAF and single PAF 7.0 1.6 8 0 29.9 6 15 No
2 Falling Single AAF and single PAF 4.7 0.0 7 0 43.2 6 12 No
3 MVA Single AAF and single PAF 5.5 0.8 6 0 35.7 3 12 No
4 MVA Double AAFs and single PAF 9.3 2.1 8 1 55.9 3 18 No
5 Falling Single AAF and single PAF 7.2 1.4 7 2 60.3 9 20 No
6 Falling Double AAFs and double PAFs 6.1 1.0 7 0 52.9 3 15 No
7 MVA Single AAF and single PAF 3.5 0.0 6 0 39.4 6 24 No
8 MVA Single AAF and single PAF 6.9 0.5 6 0 64.2 6 24 No
9 MVA Double AAFs and single PAF 8.3 1.8 7 1 44.8 3 22 No
10 Falling Single AAF and double PAFs 7.5 1.0 7 0 50.2 9 15 No
11 MVA Single AAF and double PAFs 5.9 0.6 5 0 43.8 3 21 No
12 Falling Single AAF and single PAF 5.5 1.2 6 0 62.3 6 16 No
13 MVA Single AAF and single PAF 6.7 0.8 6 1 58.7 3 12 No
M ± SD    6.5 ± 1.5 1.0 ± 0.6 6.6 ± 0.9 0.4 ± 0.7 49.3 ± 10.8 5.1 ± 2.3 17.4 ± 4.4  
t    19.090 24.239     
P    0.000a 0.000a     
  1. M Male, F Female, MVA Motor verhicle accident, AAF Anterior arch fracture, PAF Posterior arch fracture, LMD Lateral mass displacement, VAS Visual analog scale, ROM Range of motion
  2. a Paired-sample t-test