Table 1 Baseline characteristics of subjects
Patients (n) | 27 |
Third molar (n) | 49 |
Age at T1 (y) | Mean 20.78 SD 2.78 |
Root development at T1 | |
Closed apex | 22 (44.90%) |
Open apex | 27 (55.10%) |
Sex | |
Male | 2 (7.40%) |
Female | 25 (92.60%) |
Treatment duration (mo) | Mean 31.47 SD 8.21 |
Malocclusion type | |
Class I | 7 (25.92%) |
Class II | 15 (55.56%) |
Class III | 5 (18.52%) |
Median line (mm) | Mean 0.91 SD 0.77 |
Degree of crowding | |
Mild | 12 (44.44%) |
Moderate | 6 (22.22%) |
Severe | 9 (33.33%) |
Degree of anchorage | |
Maximum | 21 (77.78%) |
Moderate | 6 (22.22%) |
Tooth extracted | |
First premolar | 36 (73.47%) |
Second premolar | 13 (26.53%) |
Orthodontic appliance | |
Clear aligner | 4 (14.81%) |
Fixed appliance | 23 (85.19%) |