f) Trauma

Le Fort Classification

The classification system attempts to distinguish Le Fort fractures according to the plane of injury.

• Type 1 - aka Guerin fracture and "floating palate"
  • plane of fracture is horizontally oriented, extending to anterolateral nasal fossa
  • involves nasal septum and medial and lateral walls of maxillary sinus
  • separation of palate and maxillary alveolus from remainder of upper face and skull
  • results from blow to upper lip area

• Type 2 - the most common type, aka pyramidal fracture

Image source: http://en.wikipedia.org/wiki/LeFort_injury