Editing Sacrum (section)

===Promontory===
{{anchor|Promontorium}}The sacral promontory marks part of the border of the [[pelvic inlet]], and comprises the [[iliopectineal line]] and the [[linea terminalis]].<ref name="isbn1-57947-669-4">{{cite book |author=Kirschner, Celeste G. |title=Netter's Atlas Of Human Anatomy For CPT Coding |publisher=American medical association |location=Chicago |year=2005 |isbn=1-57947-669-4 |page=274}}</ref> The sacral promontory articulates with the last lumbar vertebra to form the [[sacrovertebral angle]], an angle of 30 degrees from the horizontal plane that provides a useful marker for a [[sling (implant)|sling implant]] procedure.