TABLE 1. Distribution of the groups according to the adhesive systems and substrates.
| Group | Substrate | Adhesive | Number of specimens |
|---|---|---|---|
| 1 | Human | Prime & Bond 2.1 | 16 |
| 2 | Human | Adhese | 16 |
| 3 | Bovine | Prime & Bond 2.1 | 16 |
| 4 | Bovine | Adhese | 16 |
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