Spine
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This is a retrospective cohort study. ⋯ 4.
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Randomized Controlled Trial
A Comparison of Drill Guiding and Screw Guiding 3D-Printing Techniques for Intra- and Extrapedicular Screw Insertion.
Screw randomized cadaveric study. ⋯ 3.
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Retrospective. ⋯ 3.