Sacral Slanting in Adolescent Idiopathic Scoliosis: Definition, Pathomechanism, and Surgical Implications: A Narrative Review.

In patients with L4-left curves and left-sided slanting, stopping fusion at L3 generally prevents coronal decompensation.

Furthermore, 5-year data show that the disc wedge angle below the lowermost instrumented vertebra (lowermost instrumented vertebra) does not progress when lowermost instrumented vertebra is L3, and patient-reported outcomes are preserved without revision surgery.