Table 3.
Main results of periodontal indices
| Group I | Group II | Difference between the 2 groups at T1 | Difference between the 2 groups at T2 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| |
T0 |
T1 |
Differences between T0 and T1 |
T2 |
T0 |
T1 |
Differences between T0 and T1 |
T2 |
|
|
|
PI |
0 |
0.9 |
t:9; p < 0.001 |
0.5 |
0 |
0.7 |
t:7; p < 0.001 |
0.5 |
NS |
NS |
|
PBI |
0 |
0.9 |
t:9; p < 0.001 |
0.3 |
0 |
0.7 |
t:7; p < 0.001 |
0.3 |
NS |
NS |
|
PPD 1.6 |
2.5 |
2.9 |
t:2.6; p < 0.05 |
2.9 |
2.4 |
2.4 |
NS |
2.9 |
NS |
NS |
| PPD 2.6 | 2.5 | 2.9 | t:2.6; p < 0.05 | 3 | 2.5 | 2.4 | NS | 2.8 | NS | NS |
PI: plaque index (Silness e Loe) [16][13].
PBI: papillary bleeding index (Saxer e Muhlemann) [17][14].
PPD: probing pocket depth (mm).
T0: 7 days after the periodontal prophylaxis (at the beginning of the active orthodontic therapy).
T1: after 20 days of active therapy.
T2: after 5 months of retention therapy.