Stems | Young’s modulus (GPa) | |
Group-1 E1 + E3 + E4 + E6 | Group-2 E2 | |
Narrow | 33.47 ± 4.15 | 26.73 ± 2.40 |
Medium | 37.51 ± 4.55 | 20.25 ± 3.13 |
Wide | 30.17 ± 3.15 | 22.56 ± 2.76 |