Objective: Sagittal balance describes a condition in which the body weight is located along a line slightly behind the rotation axis of the two femoral heads, and leads to a state of minimal energy consumption and optimal dispersion of weight. Spine surgery, especially instrumentations, can affect[for full text, please go to the a.m. URL] ; SeriesInformation ; 66. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC)