Facial Injury Severity Scale (FISS)
| Anatomical region | Type of injury | Points |
|---|---|---|
| Mandible | Dentoalveolar fracture | 1 |
| Each fracture of body/ramus/symphysis | 2 | |
| Each fracture of condyle/coronoid | 1 | |
| Midface* | Dentoalveolar fracture | 1 |
| Le Fort I fracture† | 2 | |
| Le Fort II fracture | 4 | |
| Le Fort III fracture | 6 | |
| NOE fracture | 3 | |
| ZMC fracture | 1 | |
| Nasal fracture | 1 | |
| Orbital floor or inferior rim fracture | 1 | |
| Upper face | Orbital roof or superior rim fracture | 1 |
| Displaced frontal sinus/bone fracture | 5 | |
| Non-displaced frontal sinus/bone fracture | 1 | |
| Facial lacerations | Combined length >10 cm | 1 |
*Each midfacial fracture is assigned 1 point, unless it is part of a complex.
†Unilateral Le Fort fractures are assigned half the number of points.
NOE, naso-orbital-ethmoid; ZMC, zygomaticomaxillary complex.