表 3.
3种镍钛锉的核心金属面积
Center-core area of the three nickel-titanium files
| Nickel-titanium files | Coronal center-core area/mm2 | Apical center-core area/mm2 |
| TruNatomy | 0.081 | 0.039 |
| ProTaper Gold | 0.173 | 0.064 |
| ProTaper Next | 0.122 | 0.030 |
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