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Progress in Orthodontics

Table 1 Comparison of fracture torque between SS-MIs (n = 77) and TA-MIs (n = 77)

From: Mechanical strength of stainless steel and titanium alloy mini-implants with different diameters: an experimental laboratory study

Diameters(mm)

Stainless steel (n = 11)

Titanium alloy (n = 11)

p

Mean (N.cm)

SD

Mean (N.cm)

SD

1.2

13.81

1.27

12.64

1.43

0.055§

1.3

15.15

2.92

12.90

1.60

0.008*†

1.4

25.94

1.66

18.40

3.07

< 0.001*†

1.5

27.19

1.78

24.79

1.04

< 0.001*§

1.6

35.32

1.84

31.81

1.77

< 0.001*§

1.7

44.37

4.24

40.83

4.13

0.061§

1.8

54.58

2.71

46.37

5.37

< 0.001*§

  1. *Statistically significant at p < 0.05
  2. †Mann-Whitney U test
  3. § t test for independent samples
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