Stems | Tensile stress (MPa) | |
Group-1 E1 + E3 + E4 + E6 | Group-2 E2 | |
Narrow | 313.92 ± 49.9 | 228.31 ± 28.41 |
Medium | 358.74 ± 48.96 | 192.38 ± 22.28 |
Wide | 238.35 ± 40.11 | 196 ± 30.47 |