posterior ligamentous complex
The posterior ligamentous complex acts to stabilize the vertebral column and prevents injurious flexion, distraction, rotation and translation. It is sometimes referred to as the posterior tension band although the latter also includes the spinous process.
The posterior ligamentous complex comprises the following structures:
Injury of the posterior ligamentous complex can result in subluxation or dislocation of the facet:
Lesions involving the posterior ligamentous complex have a tendency not to heal and can chronically promote progressive kyphosis and collapse and thus usually require surgery . The importance of the posterior ligamentous complex/posterior tension band is highlighted in the most commonly used spinal fracture classifications systems: AO classification of subaxial injuries, AO classification of thoracolumbar injuries and the thoracolumbar injury classification and severity score (TLICS).