| No. | Type of Laser | Physician (1) | Physician (2) | Physician (3) | Average | |
|---|---|---|---|---|---|---|
| 1 | Before | Er:YAG | 3 | 3 | 4 | 3.33 |
| After | Er:YAG | 2 | 2 | 2 | 2.00 | |
| 2 | Before | Er:YAG | 3 | 3 | 3 | 3.00 |
| After | Er:YAG | 2 | 2 | 1 | 1.67 | |
| 3 | Before | Er:YAG | 3 | 3 | 3 | 3.00 |
| After | Er:YAG | 2 | 2 | 2 | 2.00 | |
| 4 | Before | Er:YAG | 3 | 3 | 3 | 3.00 |
| After | Er:YAG | 2 | 2 | 1 | 1.67 | |
| 5 | Before | CO₂ | 3 | 3 | 3 | 3.00 |
| After | CO₂ | 2 | 1 | 1 | 1.33 | |
| 6 | Before | CO₂ | 3 | 4 | 4 | 3.67 |
| After | CO₂ | 2 | 3 | 2 | 2.33 | |