Article Figures & Data
Figures
- Fig. 1
The area of the artifact was measured on each axial image using eFilm Lite software as demonstrated.
- Fig. 2
Corresponding T2 weighted sagittal and axial images of Visualized, Partially Distorted, and Fully Distorted implanted segments.
- Fig. 3
The cross-sectional area of the artifact measures in each slice was dependent on the shape and material property of the device.
- Fig. 4
The volume of the artifact measured was significantly larger following implantation of the Prestige ST implant.
- Fig. 5
Minimal artifact was seen following the implantation of the Titanium Devices; Bryan (Top Left), Discover (Top Right), Prestige LP (Lower Left), and Prodisc C Ti (Lower Right).
- Fig. 6
Significant distortion was noted following implantation of the stainless steel Prestige ST implant; neither the index nor the adjacent levels could be assessed following implantation.
Tables
T1 T2 Sagittal TR: 400ms
TE: 7.4msTR: 3500ms
TE: 120msAxial TR: 1089ms
TE: 7.8msTR: 3500ms
TE: 80msImplant Materials Size Used (mm) (deep x width x height) Size Range (mm) Weight Range (grams) Prodisc-C CoCrMo endplates with plasma-sprayed titanium surface, UHMWPE inlay 12 x 15 x 5 12 – 18 D
15 – 19 W
5 – 7 H4.43 – 9.26 Prodisc-C Ti (prototype) TAN Endplates, superior CoCrMo insert, inferior UHMWPE inlay 12 x 15 x 5 12 – 18 D
15 – 19 W
5 – 7 H2.73 – 5.64 Prestige LP Titanium Alloy/Titanium Carbide Composite, plasma-sprayed titanium coating 12 x 17.8 x 6 12 – 18 D
17.8 W
6 – 8 H3.65 – 7.67 Discover Titanium Alloy Endplates, Polyethylene Core 15.2 x 18.7 x 8 13.7 – 16.7 D
14.2 – 18.7 W
5 – 9 H2.14 – 5.54 Bryan Titanium shells, Polyurethane nucleus and sheath 14 (diameter) x 6 14 – 18 D
6 HPrestige ST Stainless steel 14 x 17.8 x 7 12 – 18 D
17.8 W
6 – 7 H10.41 – 14.74 D: depth; W: width; H: height.
I Visualized No distinguishable artifact in either sagittal or axial images of the spinal canal or bilateral neural foramina. II Partially Distorted Distortion of either neural foramina or the spinal canal that allows partial visualization of the neural structures. III Fully Distorted Inability to visualize the neural structures in bilateral neural foramina and the canal. TI (All) T1 Without Prestige ST T2 (All) T2 Without Prestige ST Overall 0.999 0.988 0.997 0.990 Observer A 0.999 0.997 0.999 0.996 Observer B 0.998 0.999 1.000 0.999 Observer C 0.999 0.992 0.999 0.974 T1 T2 First Measurement (All) 0.898 0.974 Repeat Measurement (All) 0.911 0.992 First Measurement Without Prestige ST 0.86 0.913 Repeat Measurement Without Prestige ST 0.861 0.924 Level ProDisc-C ProDisc-C Ti Prestige LP Discover Bryan Prestige ST Index Partially Distorted Fully Visualized Fully Visualized Fully Visualized Fully Visualized Fully Distorted Adjacent Fully Visualized Fully Visualized Fully Visualized Fully Visualized Fully Visualized Fully Distorted
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