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Table 4 Paired samples t-test for comparisons between the time points T0 and T1 for each variable in each group

From: Digital evaluation of nasal changes induced by rapid maxillary expansion with different anchorage and appliance design

Variables

Groups

T0

T1

 
 

Mean ± SD

Mean ± SD

pa

Maxillary inter-molar width (mm)

HX-6

37.56 ± 1.37

42.90 ± 2.85

0.00014*

HX-E

41.98 ± 3.33

45.69 ± 3.14

0.00040*

HS-E

39.42 ± 3.55

43.76 ± 3.22

0.00095*

Nasal floor width (mm)

HX-6

18.79 ± 2.36

21.84 ± 3.12

0.00004*

HX-E

19.07 ± 2.71

22.17 ± 3.02

0.00138*

HS-E

17.13 ± 4.18

20.03 ± 3.97

0.00478*

Nasal wall width (mm)

HX-6

26.01 ± 1.79

28.37 ± 3.04

0.00019*

HX-E

29.17 ± 1.90

31.62 ± 2.73

0.00017*

HS-E

27.80 ± 3.01

30.47 ± 2.12

0.00622*

  1. HX-6 Hyrax-type expander anchored to permanent teeth, HX-E Hyrax-type expander anchored to deciduous teeth, HS-E Haas-type expander anchored to deciduous teeth, SD standard deviation
  2. aSignificance level p < 0.05 (*)