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Table 9 A comparison of real and ideal play of 0.018 brackets

From: Torque expression capacity of 0.018 and 0.022 bracket slots by changing archwire material and cross section

 

Ideal play (°)

Bracket

Engagement angle (°)

SD

Mean standard error

Significant difference

SS .016×.016

15.40

STB

18.63

1.42

0.82

S

2D

16.55

0.74

0.43

S

SS .017×.017

6.96

STB

8.81

0.27

0.16

S

2D

7.20

0.19

0.11

S

SS .018×.018

0.00

STB

5.77

0.16

0.09

S

2D

2.36

0.19

0.11

S

SS .016×.022

10.80

STB

14.64

0.03

0.02

S

2D

12.09

0.47

0.27

S

SS .017×.022

5.31

STB

7.42

0.03

0.02

S

2D

6.01

0.19

0.11

S

SS .017×.025

4.65

STB

6.54

0.05

0.03

S

2D

4.84

0.08

0.05

S

SS .018×.022

0.00

STB

4.86

0.12

0.07

S

2D

1.23

0.19

0.11

S

SS .018×.025

0.00

STB

4.17

0.16

0.09

S

2D

2.26

0.09

0.05

S

ST SS .016×.022

10.80

STB

11.30

0.06

0.03

S

2D

11.30

0.40

0.23

S

ST SS .018×.022

0.00

STB

10.82

0.13

0.08

S

2D

4.98

0.14

0.08

S

TMA .0175×.0175

3.32

STB

9.59

0.87

0.50

S

2D

6.71

0.69

0.40

S

CuNiTi .016×.016

15.40

STB

20.83

0.25

0.14

S

2D

18.59

0.88

0.51

S

CuNiTi .017×.017

6.96

STB

16.36

0.58

0.33

S

2D

16.40

0.76

0.44

S

CuNiTi .018×.018

0.00

STB

8.37

0.46

0.26

S

 

2D

5.47

0.74

0.43

S

Nitinol .017×.025

4.65

STB

7.86

0.18

0.10

S

2D

5.94

0.15

0.09

S

NiTi .018×.025

0.00

STB

14.95

0.27

0.15

S

2D

3.10

0.24

0.14

S