表 2. 摩擦前后弓丝表面粗糙度.
Tab 2 Mean values for roughness of archwires before and after mechanical traction
| 弓丝/mm | 摩擦前 | 摩擦后 | ||
| 与传统四翼托槽组合 | 与Lock-loose托槽组合 | 与自锁托槽组合 | ||
| 0.406 4 | 18.1±1.5 | 19.1±1.7 | 20.1±2.1 | 19.3±1.1 |
| 0.457 2 | 18.6±1.4 | 19.3±1.3 | 21.2±0.8 | 20.7±1.6 |
| 0.457 2×0.634 9 | 22.9±2.1 | 22.3±3.4 | 24.1±2.3 | 23.6±1.5 |
| 0.482 6×0.634 9 | 21.8±0.9 | 20.1±1.5 | 22.1±1.8 | 21.1±1.7 |
nm