Table 2.
Mean, SD, and p-values of the specimens tested for tensile strength
| Sample | Control (C) | 2.5%NZ (X) | 5%NZ (Y) | 7.5%NZ (Z) |
|---|---|---|---|---|
| Max | 62.67 | 67.90 | 70.02 | 71.76 |
| Min | 53.85 | 59.55 | 63.64 | 64.43 |
| Mean ± SD | 51.77±3.14a | 63.55±2.91b | 66.32±1.87c | 69.59±1.00d |
| 95% CI | 55.7–60.2 | 61.5–65.6 | 65.0–67.7 | 67.5–70.9 |
| p-value | – | vs C=0.001 | vs C=0.000 | vs C=0.012 |
| – | – | vs X=0.003 | vs X=0.000 | |
| – | – | – | vs Y=0.000 |
Notes: One-way ANOVA and a paired sample t-test (p<0.05) indicate differences among nano-ZrO2 concentrations as shown by differences in superscripts letters horizontally.
Abbreviations: C, unreinforced heat-polymerized acrylic resin; 2.5%NZ, 2.5 wt% nano-ZrO2 reinforced heat-polymerized acrylic resin; 5%NZ, 5 wt% nano-ZrO2 reinforced heat-polymerized acrylic resin; 7.5%NZ, 7.5 wt% nano-ZrO2 reinforced heat-polymerized acrylic resin.