Groups | Mean service life of restorations (SD) years | Mean plaque index (SD) | Mean gingival index (SD) |
G1 | — | 2.45 (0.10) | 2.25 (0.21) |
G2 | 8.14 (0.65) | 2.8 (0.22) | 2.5 (0.27) |
G3 | 9.17 (0.63) | 2.5 (0.28) | 2.25 (0.23) |
G4 | 9.3 (0.65) | 2.95 (0.10) | 2.8 (0.24) |