TABLE 2.
Mean shear bond strength (in MPa) of resin composite to MTA with and without PDA pretreatment at various time intervals
| Statistical parameters | Groups | ||||||
|---|---|---|---|---|---|---|---|
| Group 1 (with PDA) | Group 2 (No PDA) | ||||||
| Immediate | 3 h | 24 h | 96 h Immediate | 3 h | 24 h | 96 h | |
| Mean±SD (in MPa) | 26.30±7.60a | 29.14±6.50a | 40.66±8.60bc | 43.79±4.40c 12.26±3.82a | 17.26±6.15ab | 25.92±6.67b,c | 27.82±2.96c |
| Median | 24.40 | 28.50 | 38.28 | 44.17 10.84 | 16.66 | 24.29 | 28.23 |
| IQR | 4.47 | 4.10 | 10.46 | 7.87 6.63 | 1 2.58 | 4.08 | 3.22 |
Under each group, different lower case alphabets denote significant difference between the time intervals (p<0.05). MTA: Mineral trioxide aggregate, PDA: Polydopamine, SD: Standard deviation, IQR: Interquartile range