Sagittal Balance Through Ages

The parameters of the sagittal balance of the cervical, thoracic and lumbar spine vary according to the types of spino-pelvic organization (types 1-4 according to Roussouly). These parameters have been described as a function of age in previous scientific work without taking into account the pelvic anatomy (pelvic incidence and spino-pelvic organization). This work, carried out within the framework of a round table of the French Society of Spinal Surgery (SFCR), would make it possible to provide a more detailed repository of existing radiographic parameters.