Final answer:
The main goals of adult deformity surgery are to restore sagittal balance and correct lumbar lordosis. Both parameters are important, and their relationship should be carefully considered. Sagittal balance aims to align the spine in the front-to-back direction, while lumbar lordosis aims to adjust the curve of the lower spine.
Step-by-step explanation:
The main goals of adult deformity surgery are the restoration of sagittal balance and correction of lumbar lordosis to normal anatomic ranges. Sagittal balance refers to the alignment of the spine in the front-to-back direction. Lumbar lordosis is the natural inward curve of the lower spine.
In adult deformity surgery, the parameters of sagittal balance and lumbar lordosis are both important, and their relationship should be carefully considered to achieve optimal outcomes.
When restoring sagittal balance, the surgeon aims to align the spine so that the head is positioned over the pelvis and the feet. This involves correcting any excessive anterior (forward) or posterior (backward) curvature of the spine, as well as any lateral (side-to-side) deviation.
In terms of lumbar lordosis, the goal is to bring the curve of the lower spine back to within the normal anatomic range. This can be achieved by adjusting the angles and positions of the vertebrae during surgery.