BP sacrum correction attempts to:

• A. Push L5 posterior
• B. Push sacrum under L5
• C. Rotate sacrum
• D. Open disc space

Answer: (B)

The main idea here is to restore a proper relationship at the lumbosacral junction by positioning the sacral base under the L5 body. When the sacrum is not aligned under L5, abnormal shear and loading occur at the L5–S1 area, which can compromise stability and motion. The BP sacrum correction aims to bring the sacrum into its normal position relative to L5, reestablishing balanced alignment and reducing those abnormal stresses. This helps normalize the articulation at the lumbosacral joint and support overall spinal biomechanics. Pushing L5 posterior would change L5’s position rather than correct the sacral base relationship. Rotating the sacrum implies a different adjustment pattern, not the targeted correction described here. Opening the disc space is not the primary goal of this correction, which focuses on aligning the sacrum with L5 rather than distracting the discs.