| FB nature | Patients n = 26 | |
| n | % | |
| Animal | 9 | 34.61 |
| 21 - 30 | 1 | 3.84 |
| 41 - 50 | 2 | 7.69 |
| 51 - 60 | 3 | 11.53 |
| 61 - 70 | 1 | 3.84 |
| 71 - 80 | 2 | 7.69 |
| Vegetal | 9 | 34.61 |
| 61 - 70 | 6 | 23.07 |
| 71 - 80 | 1 | 3.84 |
| 81 - 90 | 1 | 3.84 |
| Ignored | 1 | 3.84 |
| Teeth | 3 | 11.53 |
| 31 - 40 | 2 | 7.69 |
| 61 - 70 | 1 | 3.84 |
| Metallic | 3 | 11.53 |
| 71 - 80 | 2 | 7.69 |
| Ignored | 1 | 3.84 |
| Ignored | 1 | 3.84 |
| 11 - 20 | 1 | 3.84 |