Table 2.
Means±standard deviations of flexural strength (FS) (MPa), elastic modulus (E) (GPa), bottom/top hardness ratio (B/T), shrinkage stress (SS) (MPa) and bond strength (BS) according to the composite analyzed.
| Composite | Filler Content * | VS* | FS (MPa) | E (GPa) | B/T | SS (MPa) | BS (MPa) |
|---|---|---|---|---|---|---|---|
| Z250 | 89 wt% | 1.61% | 158.76±27.05ab | 18.22±4.51a | 0.96±0.13a | 28.11±5.96a | 68.61±5.87c |
| GRAN | 82 wt%/68 vol% | 1.70% | 141.89±24.88ab | 16.19±2.88a | 0.92±0.15a | 29.59±7.12a | 26.36±4.16d |
| TPH | 79 wt%/61 vol% | 2.3% | 170.33±35.36a | 11.92±2.58b | 0.96±0.11a | 37.75±3.68a | 22.39±4.53d |
| XBF | 75 wt% | 2.54% | 089.82±12.82d | 10.96±3.02b | 0.99±0.18a | 18.68±0.78b | 26.46±4.77d |
| SDR | 68 wt%/45 vol% | 3.5% | 115.75±30.97cd | 08.18±2.59bc | 0.97±0.14a | 24.25±1.23b | 81.47±4.83b |
| FTB | 64.5 wt%/42.5 vol% | 3% | 135.98±16.94bc | 06.74±1.42c | 0.86±0.14a | 19.45±2.91b | 142.27±15.74a |
*Z250: Filtek Z250 XT; FTB: Filtek Bulk Fill Flow; GRAN: Grandioso, XBF: X-tra Base, TPH: TPH 3, SDR: Surefil SDR. Different letters indicate statistically significant differences among the composites considering each column. *Filler content and Volumetric Shrinkage data were obtained from manufacturer’s informations provided on Technical Product Profiles