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Table 3 Comparison of the T1 laminar morphology with the literature dataa

From: Ideal T1 laminar screw fixation based on computed tomography morphometry

Measurements Groups Present study Modified sagittal reconstruction Patel,
USA[b]
Molina,
USA[c]
Hu,
China[d]
Kretzer,
USA[e]
Patient’s age   20-70 years old 20-70 years old 8-18 years old 2-16 years old 19-78 years old >18 years old
L Total 32.8 ± 3.2   29.9 ± 4.1   30.8 ± 3.4 33.4 ± 3.6
Males 34.8 ± 2.7   30.6 ± 4.2 31.9 32.0 ± 3.2 34.7 ± 3.6
Females 30.7 ± 2.1   29.1 ± 4.0 28.9 29.6 ± 3.1 32.0 ± 3.0
W Total 7.4 ± 1.3   6.5 ± 1.3   6.2 ± 1.0 6.6 ± 1.1
Males 8.1 ± 1.2   6.6 ± 1.4 5.7 6.5 ± 0.8 6.9 ± 1.1
Females 6.7 ± 1.1   6.4 ± 1.2 4.8 5.9 ± 1.0 6.3 ± 1.0
Ws Total 4.4 ± 0.9     3.4 ± 1.0 3.7 ± 1.0
Males 4.8 ± 0.9    2.4 3.6 ± 1.1 4.0 ± 1.0
Females 3.8 ± 0.6    2.0 3.2 ± 0.9 3.3 ± 0.9
A Total 48.6 ± 3.5   47 ± 4   99.9 ± 3.6 49.2 ± 3.7
Males 47.2 ± 3.2   47 ± 4 50.0 99.6 ± 4.2 49.1 ± 4.0
Females 50.1 ± 3.2   46 ± 4 50.0 100.2 ± 3.1 49.3 ± 3.4
T Total 10.8 ± 2.1 10.1 ± 2.3 12.3 ± 3.4   16.9 ± 1.3  
Males 11.9 ± 2.0 11.3 ± 2.2 11.8 ± 3.4   17.6 ± 1.3  
Females 9.6 ± 1.5 8.8 ± 1.5 12.8 ± 3.3   16.4 ± 1.0  
Ts Total 6.1 ± 1.6 5.7 ± 1.7     
Males 6.6 ± 1.7 6.3 ± 1.8   11.4   
Females 5.5 ± 1.3 5.2 ± 1.3   10.3   
H Total 13.5 ± 1.4 13.6 ± 1.6     
Males 14.0 ± 1.3 14.1 ± 1.5     
Females 12.8 ± 1.2 13.0 ± 1.4     
  1. aThe translaminar screw length (L), the minimal outer cortical width (W), the minimal cancellous width (Ws), the minimal outer cortical height (T), the minimal cancellous height (Ts), the axis angle (A) and the spinous process height (H) in T1 are reported as \( \overset{-}{\mathrm{X}} \) ±S.
  2. [b] Patel AJ, Cherian J, Fulkerson DH, Fox BD, Chern JJ, Whitehead WE, Curry DJ, Luerssen TG, Jea A (2011) Computed tomography morphometric analysis for translaminar screw fixation in the upper thoracic spine of the pediatric population. Journal of neurosurgery Pediatrics 7 (4):383-388.
  3. [c] Molina C, Sciubba DM, Chaput C, Tortolani PJ, Jallo GI, Kretzer RM (2012) A computed tomography-based feasibility study of translaminar screw placement in the pediatric thoracic spine. Journal of neurosurgery Pediatrics 9 (1):27-34.
  4. [d] Hu QF, Xu RM, Pan H, Zhou H, Lei W (2015) Translaminar Screw Fixation in the Upper Thoracic Spine: Computed Tomography-Based Quantitative Laminar Analysis and Feasibility Study of Translaminar Virtual Screw Placement. Cell biochemistry and biophysics 2015, 73(1): 191-198.
  5. [e] Kretzer RM, Chaput C, Sciubba DM, Garonzik IM, Jallo GI, McAfee PC, Cunningham BW, Tortolani PJ (2010) A computed tomography-based feasibility study of translaminar screw fixation in the upper thoracic spine. Journal of neurosurgery Spine 12 (3):286-292.