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A : Traditional trans-pedicular screw fixation through the body parallel to the end plate. B : Trans-endplate screw fixation penetrating the upper end plate, starting from the level of the inferior border of the transverse process, just 2 mm distal to the pedicle entrance, the trans-endplate lumbar pedicle screw is introduced 30° cranially to penetrate the superolateral anterior aspect of the end plate.
