| Type of frontal fracture | Headcount (n = 102) | Frequency (%) |
| Type I: Fractures of the anterior Wall | 35 | 34.31 |
| Ia: Without dislocation, no damage of the nasofrontal duct | 14 | 12.72 |
| Ib: High fracture of dislocation, not of the nasofrontal duct | 9 | 8.82 |
| Ic: Fracture with bone loss, not of the nasofrontal duct | 1 | 0.98 |
| Id: Low fracture with involvement of the nasofrontal duct | 8 | 7.84 |
| Ie: Fracture of all anterior wall with involvement of the nasofrontal duct | 3 | 2.94 |
| Type II: Posterior Wall fractures | 6 | 5.88 |
| IIa: No dislocation, no cerebrospinal fluid (CSF) leakage | 1 | 0.98 |
| IIb: Dislocation and/or bone loss, no CSF leak | 1 | 0.98 |
| IIc: Dislocation and CSF leak | 4 | 3.92 |
| Type III: Fractures of both the anterior and the posterior walls | 53 | 51.96 |
| IIIa: Type I + Type IIa or IIb | 30 | 29.41 |
| IIIb: Type I + Type IIc or IId | 23 | 22.54 |
| Type IV: Comminuted fractures of all complex nasofronto-ehtmoido-orbital | 8 | 8.82 |