Mechanical properties of the cements after 24 h and 10 000 thermocyclesa.
| Mechanical property | MS | PU1 | PU2 | PU3 | PU4 | |
|---|---|---|---|---|---|---|
| Flexible strength (MPa) | 24 h | 89.41 (3.00)Aa | 98.66 (4.18)Ba | 93.12 (5.84)ABa | 88.97 (7.39)Aa | 85.04 (5.43)Aa |
| 10 000 | 31.14 (4.72)Ab | 74.64 (1.91)Bb | 72.05 (4.06)Bb | 71.68 (4.80)Bb | 70.25 (6.36)Bb | |
| Elastic modulus (GPa) | 24 h | 4.97 (0.40)Aa | 3.67 (0.23)Ba | 3.50 (0.31)BCa | 3.48 (0.52)BCa | 2.97 (0.09)Ca |
| 10 000 | 3.45 (0.27)Ab | 2.91 (0.18)Bb | 2.82 (0.25)Bb | 2.86 (0.43)Bb | 2.49 (0.09)Ba | |
| Compressive strength (MPa) | 24 h | 186.46 (22.8)Aa | 216.29 (8.58)Ba | 182.15 (10.72)Aa | 181.19 (12.43)Aa | 170.84 (7.65)Aa |
| 10 000 | 189.56 (23.43)Aa | 239.13 (14.53) Ba | 210.79 (23.22)ABa | 205.16 (13.39) Aa | 201.45 (5.09)Ab | |
| Hardness (HV) | 24 h | 40.16 (1.50)Aa | 44.21 (1.05)Ba | 40.35 (2.13)Aa | 40.27 (1.50)Aa | 30.62 (1.32)Ca |
| 10 000 | 28.93 (1.08)Ab | 42.20 (0.65)Ba | 38.06 (2.01)Ca | 38.38 (1.45)Ca | 29.47 (1.27)Aa |
a
Capital letters represent statistically significant differences within each cement group (p < 0.05; horizontal comparisons). Lowercase letters represent statistically significant differences within each cement group before and after 10 000 thermocycles (p < 0.05; vertical comparisons). 24 h, 24 hours group. 10 000, 10 000 thermocycle group. Data are expressed as the mean (standard deviation, SD).