Table 2 Differences between Post-treatment and Post-retention Arch Dimensions (mm) of SL and CL group

Arch length Max

T(0)-T(P)

1.68

1.34

1.23

1.45

0.23

T(2)-T(0)

-2.09

1.21

-1.99

1.35

0.16

T(5)-T(2)

-0.71

0.35

-0.93

0.23

0.45

Arch length Md

T(0)-T(P)

2.31

1.56

1.98

1.76

0.36

T(2)-T(0)

-1.23

0.83

-1.29

0.79

0.48

T(5)-T(2)

-1.08

0.79

-1.10

0.86

0.38

Inter-canine width Max

T(0)-T(P)

1.89

1.23

1.86

1.36

0.47

T(2)-T(0)

-2.79

1.45

-2.61

1.21

0.26

T(5)-T(2)

-0.34

0.78

-0.31

0.67

0.56

Inter-canine width Md

T(0)-T(P)

0.68

1.46

0.56

1.56

0.35

T(2)-T(0)

-2.19

1.39

-1.98

1.36

0.47

T(5)-T(2)

-0.24

0.36

-0.54

0.52

0.12

Inter-molar width Max

T(0)-T(P)

2.36

1.20

1.12

0.87

*

T(2)-T(0)

-2.13

1.35

-2.03

1.52

0.34

T(5)-T(2)

-0.78

0.32

-0.76

0.36

0.21

Inter-molar width Md

T(0)-T(P)

2.14

1.56

2.06

1.68

0.32

T(2)-T(0)

-2.68

1.26

-2.55

1.36

0.26

T(5)-T(2)

-1.23

1.32

-1.34

1.36

0.18