Table 3. Correlation matrix of mean flexure strength results (Pearson’s).
| Beautifil II | Esthet X | Filtek Supreme Ultra | TPH3 | Z250 | |
|---|---|---|---|---|---|
| n = 20; r = Pearson’s correlation coefficient; r 2 = determination coefficient Correlation matrix represents comparison of all materials’ results with each other using all data points (baseline through 30 months). | |||||
| Beautifil II | 1.0 | r = 0.84 p = 0.004 r 2 = 0.71 |
r = 0.81 p = 0.007 r 2 = 0.65 |
r = 0.84 p = 0.004 r 2 = 0.71 |
r = 0.58 p = 0.099 r 2 = 0.33 |
| Esthet X | r = 0.84 p = 0.004 r 2 = 0.71 |
1.0 | r = 0.80 p = 0.008 r 2 = 0.64 |
r = 0.84 p = 0.008 r 2 = 0.71 |
r = 0.47 p = 0.198 r 2 = 0.22 |
| Filtek Supreme Ultra | r = 0.81 p = 0.007 r 2 = 0.65 |
r = 0.84 p = 0.008 r 2 = 0.71 |
1.0 | r = 0.56 p = 0.109 r 2 = 0.31 |
r = 0.58 p = 0.095 r 2 = 0.33 |
| TPH3 | r = 0.84 p = 0.004 r 2 = 0.71 |
r = 0.84 p = 0.008 r 2 = 0.71 |
r = 0.56 p = 0.109 r 2 = 0.31 |
1.0 | r = 0.64 p = 0.06 r 2 = 0.41 |
| Z250 | r = 0.58 p = 0.099 r 2 = 0.33 |
r = 0.47 p = 0.198 r 2 = 0.22 |
r = 0.58 p = 0.095 r 2 = 0.33 |
r = 0.64 p = 0.06 r 2 = 0.41 |
1.0 |