| 1 | Tar is a binder for gravel in paving. | |
| 2 | The direct bonded restoration has been common technique for the lost structure of the posterior tooth. | |
| 3 | We rough the non-bonding region to reduce the situation that non-bonding region was boned to glass. | |
| 4 | It is well accepted that the main role for strong bonding depends upon the hybrid layer(HL) formed and quality of the interface. | |
| 5 | Vehicle: The liquid component of ink. It is the combination of lacquer, oil and alcohol which serves to carry the pigment and bonds it to the substrate. |
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