Table 4 Statistical analysis of shear bond strengths of resin composites bonded to alumina substrate at different periods of water storage (24 h, 30 days) followed by Scheffe’s Multiple Comparison test
Materials | Mean difference | P value | 95% confidence interval | ||
|---|---|---|---|---|---|
| Â | Â | Â | Â | Lower bound | Upper bound |
Belle-Glass | Sinfony | 3.53 | <0.01 | 1.80 | 5.26 |
| Â | GC Gradia | 1.15 | 0.26 | -0.58 | 2.88 |
Sinfony | Belle-Glass | −3.53 | <0.01 | −5.26 | −1.80 |
|  | GC Gradia | −2.38 | <0.01 | −4.11 | −0.64 |
GC Gradia | Belle-Glass | −1.15 | 0.26 | −2.88 | 0.58 |
| Â | Sinfony | 2.38 | <0.01 | 0.64 | 4.11 |