|
Variable
|
SL group
|
Cl group
|
P
|
|---|
|
Mean
|
SD
|
Mean
|
SD
|
|---|
|
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
|
- Max indicates maxillary; Md indicates mandibular; T(P) = pretreatment; T(0) = post-treatment; T(2) = 2 years post-retention; T(5) = more than 5 years post-retention; P > 0.05 indicates no statistically significant change.
