Article Figures & Data
Figures
- Fig. 1
(a) Anterior plate and (b) Integrated fixation cage designs used for the fatigue testing.
- Fig. 2
Steps involved in creating three dimensional (3D) volumes of screw holes from post-fatigue micro-CT images of (a) Integrated fixation cage and (b) Anterior plate constructs.
- Fig. 3
Optical images of (a) anterior plate and cage and (b) integrated fixation cage (IFC) constructs after fatigue testing. Medial screw back out is visible in the IFC construct.
- Fig. 4
Mean and standard deviations of normalized screw hole volumes for IFC and AP+C constructs. Dotted line represents no change in screw hole volume post-fatigue testing. * indicates significantly greater screw loosening than AP+C (p=0.008).
- Fig. 5
Mean and standard deviations of normalized screw hole volumes for medial and lateral screws of IFC and top and bottom screws of AP+C. Dotted line represents no change in screw hole volume post-fatigue testing. *Indicates significantly greater screw loosening (p<0.003).
- Fig. 6
Screw loosening after fatigue testing vs. BMD for IFC and AP+C constructs. Linear regression values yielded 18-33% R-squared values (p≥0.11).
Tables
Specimen Sex Age T-Score BMD (g/cm2) 1 M 69 1.2 1.176 2 M 72 1.5 1.206 3 M 61 -2.1 0.813 4 M 71 0.1 1.053 5 M 85 -1.1 0.923 6 M 81 -1.6 0.865 7 M 70 -1.8 0.841 8 F 70 -2.4 0.782 9 F 83 -2.9 0.724
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