Alveolar ridge heights

Measure points

%

Mean (mm)

Std. dev. (mm)

Measure-point distribution

%

n =

3528

n =

3528

Group I (≤2 mm)

902

25.57

1.6

0.2

2nd maxillary molar

264

7.48

Group II (2 - 4 mm)

1124

31.86

3.1

0.3

1st maxillary molar

1789

50.71

Group III (4 - 6 mm)

862

24.43

4.8

0.5

2nd maxillary premolar

956

27.10

Group IV (6 - 8 mm)

427

12.10

7.3

0.4

1st maxillary premolar

383

10.86

Group V (>8 mm)

213

6.04

10.7

1.2

Canine

136

3.85