Article Figures & Data
Figures
- Figure 1
Three-dimensional representation of the finite element model. (A) Baseline intact model. (B) Axial (left) and posterior (right) views of the bilateral transforaminal lumbar interbody fusion model. (C) Anterior lumbar interbody fusion model with both lateral (left) and posterior (right) perspectives.
- Figure 2
Comparative analysis of motion at each vertebral segment in the anterior lumbar interbody fusion (ALIF) model and the 2 largest transforaminal lumbar interbody fusion (TLIF) cage models during flexion (A) and extension (B).
Tables
Cage Height
(mm)Width
(mm)Length
(mm)Lordotic Angle
(°)Surface Area (mm2) TLIF cage 1 9 8 22 15 340 TLIF cage 2 9 10 25 15 484 TLIF cage 3 9 10 28 15 536 TLIF cage 4 9 12 28 15 652 TLIF cage 5 9 12 32 15 740 ALIF cage 11 34 26 15 2194 Abbreviations: ALIF, anterior lumbar interbody fusion; TLIF, transforaminal lumbar interbody fusion.
- Table 2
Degrees of range of motion in the intact spine model and spine models with each cage inserted during flexion and extension.
Flexion Intact Cage 1 TLIF Cage 2 TLIF Cage 3 TLIF Cage 4 TLIF Cage 5 TLIF ALIF Cage T12–L1 4.36 4.41 4.41 4.40 4.41 4.41 4.39 L1–L2 4.48 4.58 4.58 4.56 4.58 4.59 4.53 L2–L3 3.33 3.39 3.39 3.36 3.39 3.40 3.35 L3–L4 5.21 5.50 5.47 5.40 5.47 5.50 5.33 L4–L5 4.01 3.65 3.89 3.95 3.98 4.22 4.04 L5–S1 8.89 1.85 1.64 1.52 1.28 0.93 0.18 Total 30.27 23.37 23.38 23.20 23.10 23.06 21.83 Extension Intact Cage 1 TLIF Cage 2 TLIF Cage 3 TLIF Cage 4 TLIF Cage 5 TLIF ALIF Cage T12–L1 5.43 5.47 5.46 5.46 5.46 5.47 5.52 L1–L2 3.57 3.62 3.65 3.65 3.58 3.58 3.81 L2–L3 3.08 3.19 3.19 3.19 3.19 3.19 3.17 L3–L4 3.64 3.71 3.70 3.70 3.69 3.69 3.68 L4–L5 1.43 1.63 1.69 1.86 1.94 2.17 2.51 L5–S1 7.54 0.71 0.68 0.53 0.25 0.19 0.33 Total 24.71 18.32 18.37 18.40 18.11 18.28 19.02 Abbreviations: ALIF, anterior lumbar interbody fusion; TLIF, transforaminal lumbar interbody fusion.
Flexion Cage 1 TLIF Cage 2 TLIF Cage 3 TLIF Cage 4 TLIF Cage 5 TLIF ALIF Cage L5 7.52 7.08 6.21 5.90 6.59 14.22 S1 7.44 6.46 6.45 6.19 6.66 11.83 Extension Cage 1 TLIF Cage 2 TLIF Cage 3 TLIF Cage 4 TLIF Cage 5 TLIF ALIF cage L5 2.35 3.51 4.57 4.62 4.89 13.56 S1 4.65 8.05 8.50 9.32 11.90 11.66 Abbreviations: ALIF, anterior lumbar interbody fusion; TLIF, transforaminal lumbar interbody fusion.
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