Table 2 Values of friction for different bracket and wire/ligature combinations and mean friction values

Lower lingual

A1

In-Ovation L

4.73

3.55

5.90

A2

7th Generation

3.19

3.42

1.28

5.20

2.85

A3

New STb

1.1

0.81

0.59

1.80

1.18

A4

O.R.J.

1.79

1.86

1.72

1.77

1.82

A5

OldSTb

2.32

1.73

1.48

3.40

2.65

Lower labial

A6

Forestadent

3.17

4.63

1.86

4.50

1.70

A7

Ormco Mini Diamond

2.65

3.95

2.24

2.50

1.90

A8

G&H Ceramic

4.64

4.80

1.07

8.10

4.61

Upper lingual

B1

7th Generation

4

4.45

2.24

7.00

2.29

B2

O.R.J.

2.43

2.99

1.56

2.80

2.39

B3

Old STb

2.1

2.34

0.76

2.90

2.39

B4

New STb

1.79

2.01

0.67

2.37

2.10

B5

In-Ovation L

2.6

1.67

3.52

Upper labial

B6

Forestadent

3.27

4.53

1.63

5.50

1.40

B7

Ormco Mini Diamond

2.62

3.84

0.62

4.00

2.03

B8

G&H Ceramic

4.38

5.30

1.70

8.17

2.36