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Table 3 Width of the root, alveolar housing, and total ridge width (mm)

From: Cone beam computed tomographic analysis of the spatial limitation during mandibular arch distalization

 

Widest root area

Distal point of 2nd molar

0.5 mm distal to 2nd molar

1 mm distal to 2nd molar

1.5 mm distal to 2nd molar

Subcrest

Root width

Alveolar housing

Ridge width

Root width

Alveolar housing

Ridge width

Root width

Alveolar housing

Ridge width

Root width

Alveolar housing

Ridge width

Root width

Alveolar housing

Ridge width

0 mm

Mean

8.07

9.03

12.05

6.38

8.01

12.96

5.56

8.03

13.07

5.40

8.27

13.52

0

8.22

13.59

 

S.D.

2.91

3.31

4.53

3.32

4.25

5.15

5.24

4.99

5.40

3.39

4.22

5.03

0

4.54

5.29

2 mm

Mean

7.30

9.66

13.92

5.22

10.53

15.15

4.78

12.13

17.90

4.13

10.83

15.51

0

10.96

15.73

 

S.D.

2.19

3.20

4.56

3.46

2.55

3.35

3.24

2.68

3.30

3.28

2.71

3.21

0

2.81

3.41

4 mm

Mean

6.54

11.20

16.42

5.18

10.95

17.02

4.36

10.94

17.22

4.00

11.07

17.30

4.65

11.25

17.54

 

S.D.

1.90

3.09

4.60

3.23

2.46

2.69

3.13

2.21

2.40

3.12

2.46

2.61

2.85

2.14

2.28

6 mm

Mean

5.54

10.05

15.80

4.90

11.10

17.43

4.05

11.13

17.16

3.90

12.51

18.36

4.20

11.28

17.52

 

S.D.

1.96

3.25

4.66

2.81

1.73

2.01

2.73

1.74

1.96

2.80

1.92

2.09

2.72

1.87

1.98

8 mm

Mean

4.78

10.09

15.82

4.26

10.78

17.13

3.77

10.76

15.36

3.70

10.71

16.91

3.58

10.88

15.90

 

S.D.

2.42

3.07

4.45

2.52

1.73

1.89

2.29

2.10

2.28

2.40

2.10

2.19

2.25

1.92

2.07

10 mm

Mean

3.60

9.88

15.59

3.56

10.36

15.31

3.21

10.31

15.15

3.21

10.27

15.08

2.59

10.27

15.99

 

S.D.

2.04

3.03

4.43

2.09

1.82

2.20

1.92

1.90

2.25

1.89

1.92

2.33

1.55

1.95

2.16

12 mm

Mean

2.96

9.19

14.93

3.22

9.55

15.28

2.45

9.73

15.12

2.77

10.55

15.04

2.28

9.58

14.91

 

S.D.

1.12

3.28

4.71

1.35

2.39

2.97

0.88

2.26

2.84

1.02

2.28

2.87

0.81

2.28

2.80

 

2.0 mm distal to 2nd molar

2.5 mm distal to 2nd molar

3.0 mm distal to 2nd molar

3.5 mm distal to 2nd molar

4.0 mm distal to 2nd molar

Subcrest

Root width

Alveolar

housing

Ridge width

Root width

Alveolar housing

Ridge width

Root width

Alveolar housing

Ridge width

Root width

Alveolar housing

Ridge width

Root width

Alveolar housing

Ridge width

0 mm

Mean

0

8.59

13.83

0

9.03

14.43

0

9.89

15.39

0

9.66

15.28

0

9.24

14.39

 

S.D.

0

4.65

5.27

0

4.39

5.38

0

4.14

4.99

0

4.06

5.25

0

4.63

6.64

2 mm

Mean

0

10.91

16.72

0

11.17

17.11

0

11.12

17.00

0

10.98

16.84

0

10.34

15.74

 

S.D.

0

2.83

3.38

0

2.65

3.15

0

2.97

3.69

0

3.27

4.17

0

4.31

5.98

4 mm

Mean

0

11.34

17.65

0

11.34

17.68

0

11.40

17.48

0

11.22

17.24

0

10.37

15.94

 

S.D.

0

2.11

2.18

0

2.27

2.14

0

2.61

3.06

0

2.90

3.67

0

4.09

5.83

6 mm

Mean

5.30

11.42

17.68

0

11.13

17.42

0

11.12

17.28

0

10.85

16.90

0

9.98

15.61

 

S.D.

2.64

1.90

1.97

0

1.98

2.18

0

2.36

2.94

0

2.74

3.60

0

3.92

5.73

8 mm

Mean

4.80

10.84

16.90

0

10.68

16.63

0

10.69

16.58

0

10.26

16.07

0

9.36

14.77

 

S.D.

2.29

1.92

1.95

2.19

1.93

2.18

0

2.31

2.91

0

2.62

3.48

0

3.72

5.48

10 mm

Mean

2.83

10.04

15.79

2.90

9.97

15.72

2.00

9.80

15.46

0

9.46

15.12

0

8.66

13.86

 

S.D.

1.30

2.28

2.45

1.53

1.85

2.23

1.23

2.16

2.87

0

2.44

3.45

0

3.49

5.22

12 mm

Mean

2.00

9.50

14.95

1.90

9.36

14.70

1.98

8.99

14.28

1.75

8.84

14.15

1.50

8.05

12.96

 

S.D.

0.62

2.22

2.84

0.69

2.19

2.81

0.64

2.61

3.77

1.11

2.58

3.68

1.03

3.51

5.36

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