Table 2.
Mean hardness number and crosslink density of the tested bulk fill composite resins after dry storage, storage in 75% ethanol, and storage in 100% methyl ethyl ketone.
| Bulk fill composite resin | Dry storage | Storage in 75% E | Storage in 100% MEK | P value¶ |
|---|---|---|---|---|
| SureFill | ||||
| Vickers hardness number (SD) | 82.4 (2.4) | 76.6 (2.1) | 74.6 (1.7) | |
| Crosslink density (SD) | — | 7.0 (1.4) | 9.4 (2.5) | 0.02∗ |
|
| ||||
| SonicFill | ||||
| Vickers hardness number (SD) | 99.0 (1.3) | 88.5 (1.6) | 87.2 (1.8) | |
| Crosslink density (SD) | — | 10.5 (1.8) | 11.9 (1.3) | 0.06 |
|
| ||||
| P value€ | <0.0001∗ | 0.02∗ | ||
SD: standard deviation.
¶ P value of t-test comparing differences after using solvents in each material.
€ P value of t-test comparing the two materials when each solvent was used.
∗Statistically significant difference at P ≤ 0.05.