Mechanical Load Study of Lumbar Center of Rotation and Lordosis and Its Potential Relationship to Formation of Rotatory Olisthesis.

Introduction: Rotatory olisthesis is a common finding of adult degenerative scoliosis. An in vitro model of rotatory olisthesis of the lumbar spine and its correlation with the center of rotation (COR) and lumbosacral lordosis (L3-S1) are presented.

Methods: Different centers of rotation and various angles of lumbosacral lordosis were tested for the production of rotatory olisthesis.