Dislocation of the veebra is uncommon in thoracic region because in this region
The superior aicular process is directed backward, upward and laterally (BUL) in the thoracic region. It interlocks with the corresponding inferior aicular facet making a strong aiculation rendering dislocation in the thoracic region uncommon.
The aicular processes are interlocked
The veebral body is long
Anterior longitudinal ligament is strong
Spinous process is long and pointed
Back region