Mean ± SD, mm

Interdistance

Arch

Treatment

Canine

First premolar

Second premolar

First molar

pre-

35.8 ± 2.2

41.6 ± 1.7

47.8 ± 2.4

53.9 ± 2.2

Maxilla

**

**

post-

36.6 ± 1.7

45.0 ± 2.2

50.4 ± 2.4

55.0 ± 2.5

pre-

27.8 ± 2.2

34.5 ± 1.8

40.2 ± 2.0

46.6 ± 2.2

Mandible

**

**

post-

27.0 ± 1.4

36.3 ± 1.8

42.0 ± 1.6

47.0 ± 2.0