Purpose: To clinically evaluate dentin bonding systems. Materials and
Methods: Eighty Class V carious lesions were prepared and restored wit
h four different adhesive systems: Clearfil Liner Bond/Clearfil Photo
Anterior, Scotchbond Multi-Purpose/Silux Plus, Syntac/Heliomolar, and
Gluma 2000/Pekalux. All restorations were evaluated at baseline, after
1 year and 2 years using the USPHS criteria. Results: No significant
difference was noticed between the tested materials after 1 year. Howe
ver, the 2-year results revealed that the restorations of Groups 1 and
2 were superior to restorations of Groups 3 and 4. Adhesive systems t
hat remove the smear layer and have a substantial lining function perf
ormed better than those that only modify the smear layer.