| PMMA1 | Y-ZIR | ||||
Lingual | Mesial | Distal | Lingual | Mesial | Distal | |
Buccal | 0.673 | <0.01** | <0.01** | 0.406 | <0.01** | <0.01** |
Lingual | - | <0.01** | <0.01** | - | 0.149 | 0.028* |
Mesial | - | - | 0.994 | - | - | 0.920 |