Fig. 2
Boxplot diagram showing the PI for the UPJ and LOJ at different time points.TO: 1Â week before bracket bonding; T1: 3Â weeks after bracket bonding; T2: 6Â weeks after bracket bonding; T3: 3Â months after bracket bonding; T4: 6Â months after bracket bonding; T5: 1Â year after bracket bonding. PI Scores: 0: no plaque; 1: single plaque areas; 2: plaque lines; 3: plaque extension up to 1/3 of tooth surface; 4 plaque extension up to 2/3 of tooth; 5: plaque extension more than 2/3 of the tooth surface