Table 3. Frequency of fracture patterns in study groups .
| Resin composite | Adhesive system | Adhesive fracture | Mixed fracture | Cohesive fracture | N |
| Methacrylated based resin composite (Z250) | Adper Single bond 2 | 8 | 15 | 3 | 26 |
| Clearfil SE bond | 21 | 3 | 2 | 26 | |
| Silorane adhesive | 7 | 14 | 5 | 26 | |
| Silorane based composite (Filtek Silorane) | Adper Single bond 2 | 9 | 11 | 6 | 26 |
| Clearfil SE bond | 21 | 5 | 0 | 26 | |
| Silorane adhesive | 12 | 13 | 1 | 26 |