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Table 1 Descriptive statistics and statistical analysis of the treated sample recorded at T1, T2, and T3

From: Anchorage onto deciduous teeth: effectiveness of early rapid maxillary expansion in increasing dental arch dimension and improving anterior crowding

 

Time

Comparisons

 

T1

T2

T3

T1 vs T2

T1 vs T3

T2 vs T3

n = 20

n = 20

n = 20

   

Inter-canine width

      

 mean (SD), mm

28.0(1.9)

34.4(2.4)

32.2(2.0)

S*

S*

S*

 95 % CI

27.1 to 28.9

33.3 to 35.6

31.3 to 33.1

   

Inter-canine arch

      

 mean (SD), mm

30.7(3.2)

41.1(4.7)

37.0(3.6)

S

S

S

 95 % CI

29.2 to 32.3

38.7 to 43.3

35.3 to 38.7

   

Inter-molar width

      

 mean (SD), mm

44.8(2.5)

49.7(1.9)

49.6(2.3)

S

S

NS

 95 % CI

43.7 to 46.0

48.7 to 50.5

48.5 to 50.6

   

Inter-molar depth

      

 mean (SD), mm

29.8(1.7)

30.9(2.1)

30.6(1.9)

S §

S §

NS §

 95 % CI

29.0 to 30.6

30.0 to 31.9

29.7 to 31.4

   
  1. S is the significant result of the Tukey test performed after the repeated-measures ANOVA *(F (2,21) = 17.21; p < 0.001; power of the test = 100 %); (F (2,21) = 11.67; p < 0.001; power of the test = 100 %); (F (2,21) = 18.79; p < 0.001; power of the test = 100 %). § S is the significant result and NS is the non-significant result of the Tukey test performed after the repeated-measures ANOVA (F (2,19) = 17.13; p < 0.001; power of the test = 99 %)