Article Figures & Data
Figures
- Fig. 1
Lumbar spine (L1-L5) experimental set-up showing compressive follower preload cables and guides.
- Fig. 2
Fluoroscopic images of protocol steps: 1) Intact spine; 2) Stand-alone ALIF 3) ALIF + Bilateral pedicle screws; 4) Stand-alone expandable TLIF; 5)Expandable TLIF + Bilateral pedicle screws.
- Fig. 3
View of inferior endplates and implant placements after sectioning of intervertebral disc. A) Expandable TLIF cage showing the posterior approach. B) ALIF cage showing the anterior approach.
- Fig. 4
Expandable TLIF cage surgical stages. A) interbody cage during deployment, B) cage fully deployed, C) cage expanded.
- Fig. 5
Range of motion of ALIF and the expandable TLIF devices in both implanted segments (L2-L3 and L3-L4) in flexion-extension without preload.
- Fig. 6
Range of motion of ALIF and the expandable TLIF devices in both implanted segments (L2-L3 and L3-L4) in flexion-extension under 400N follower preload.
- Fig. 7
Range of motion of ALIF and expandable TLIF devices in both implanted segments (L2-L3 and L3-L4) in lateral bending.
- Fig. 8
Range of motion of ALIF and expandable TILF devices in both implanted segments (L2-L3 and L3-L4) in axial rotation.
Tables
Intact TLIF TLIF+PS % Change TLIF from Intact % Change TLIF+PS from Intact Flexion-Extension ON 7.1±1.1 3.3±1.3 0.6±0.3 -53±18% -91±3.9% Flexion-Extension 400N 7.1±1.1 3.1±1.1 0.6±0.2 -57±14% -91±3.5% Lateral Bending 8.0±1.5 4.1±1.5 1.1±0.4 -50±16% -86±4.5% Axial Rotation 2.4±1.4 1.5±0.5 0.7±0.2 -21±40% -62±24% ↵* Reported ranges of motion are from combined L2-L3 and L3-L4 motion data.
Intact ALIF ALIF+PS % Change ALIF from Intact % Change ALIF+PS from Intact Flexion-Extension 0N 7.4±1.8 5.2±1.4 0.8±0.3 -28±15% -89±4.7% Flexion-Extension 400N 7.4±1.6 2.9±0.8 0.6±0.1 -61±12% -92±1.9% Lateral Bending 8.9±1.9 3.9±1.7 1.1±0.4 -56±14% -88±3.4% Axial Rotation 2.6±2.1 1.6±0.9 0.6±0.3 -22±36% -66±22% ↵* Reported ranges of motion are from combined L2-L3 and L3-L4 motion data.
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