Research Article
Fracture Resistance of Endodontically Treated Premolars Reconstructed by Traditional Casting and CAD-CAM Milling Post and Cores
Table 1
Properties of alloys for fabricating the post and core in the study group.
| | Type | Ultimate tensile strength (MPa) | Yield strength at 0.2% offset (MPa) | Elongation (%) | VHN(kg/mm2) | Density (g/cm3) | Composition |
| | Co-Cr [16] | 755 | 675 | 6 | 359 | 8.7 | Co 63.5%
Cr 27.0%
Mo 5.5%
Fe 2.0%
Ni, Si, Mn<1% | | NPG [17] | 560 | 265 | 15 | 140 | 7.8 | Cu 80.7%
Al 7.8%
Ni 4.3%
C, Si, Nb, Mn, Fe <1% | | Co-Cr-Mo metal blocks [18] | 597 | 413 | 12 | 288 | 8.3 | Co 65%
Cr 28%
Mo 5%
C, Si, Nb, Mn, Fe <1% |
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