| Previous medical interventions | Antibiotic therapy | Bandages | Graft | |||
| Frequency | % | Frequency | % | Frequency | % | |
| YES | 22 | 100 | 22 | 100 | 7 | 31.8 |
| NO | 0 | 0 | 0 | 0 | 15 | 68.2 |
| TOTAL | 22 | 100 | 22 | 100 | 22 | 100 |