From: Effect of different surface treatments on shear bond strength of ceramic brackets to old composite
Groups | P-value |
---|---|
Control and grinding | < 0.001 |
Control and laser | 0.008 |
Control and sandblasting | < 0.001 |
Grinding and laser | 0.001 |
Grinding and sandblasting | 0.817 |
Laser and sandblasting | 0.001 |