Table 1.
Mean Age and Number of Subjects (Boys/Girls) in Groups 1 And 2, at the Four Registration Points
|
|
T0a |
T1 |
T2 |
T3 |
||||||||||||||||
| n |
Boys |
Girls |
Mean |
SD |
n |
Boys |
Girls |
Mean |
SD |
n |
Boys |
Girls |
Mean |
SD |
n |
Boys |
Girls |
Mean |
SD |
|
| Group 1b | 28 | 13 | 15 | 12.5 | 1.47 | 28 | 13 | 15 | 15.1 | 1.57 | 26 | 12 | 14 | 21.2 | 2.45 | 24 | 11 | 13 | 27.0 | 2.51 |
| Group 2 | 36 | 10 | 26 | 13.2 | 4.18 | 36 | 10 | 26 | 16.1 | 4.36 | 36 | 10 | 26 | 22.4 | 4.13 | 28 | 6 | 22 | 27.8 | 4.14 |
a
T0 indicates before treatment; T1, after treatment; T2, 6 years after treatment; T3, 12 years after treatment.
b
Group 1 indicates canine-to-canine retainer; group 2, twistflex retainer.