Three- instead of two-dimensional evaluation of key parameters alters the choice of the lowest instrumented vertebra in Lenke 1 and 2 AIS patients.

The findings highlight that a 3D evaluation alters the choice of the LIV in Lenke 1 and 2 AIS patients. Although, the true impact of this more precise 3D measurement on preventing poor radiographic outcome needs further investigation, the results are a first step toward establishing a basis for 3D assessments in daily practice.