Table 5 Patient Characteristics

Gender

Female:Male – 17:1

Age

23.46 ± 4.62 years old

Skeletal type I

Skeletal type II

3 cases

15 cases

Angle’s Classification

- Class I

- Class II div 1

6 cases

12 cases

Crowding maxillary arch

-3.42 ± 1.50 mm

Overjet

Overbite

6.10 ± 1.69 mm

3.70 ± 1.86 mm

Extraction pattern

Upper 4 s:

Upper 4 s-Lowers 4 s/5 s:

Upper 4 s-:

4 cases

12 cases

2 cases

Lower fixed appliance

6 cases

Total number of aligners

12 Models (24 aligners)

Treatment time

276.8 ± 58.4 days or 38.8 ± 7.9 weeks

Off-track amount

Stage1

None:

1 case

Mild (≤0.5 mm)

8 cases

Moderate (0.5-1 mm)

6 cases

Severe (> 1 mm)

3 cases

Stage2

None:

7 cases

Mild (≤ 0.5 mm)

7 cases

Moderate (0.5-1 mm)

3 cases

Severe ( > 1 mm)

1 case

Off track management:

Stage1

None

9 cases

Back track

1 time

4 cases

2 time

2 cases

Elastic traction

3 cases

Stage2

None

12 cases

Back track

0 case

Elastic traction

6 cases