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Table 2 Orientation of the lower third molar in relation to the IAN using the cylindrical coordinate system

From: New quantitative classification of the anatomical relationship between impacted third molars and the inferior alveolar nerve

Anatomical relationship

Contact

Non-contact

Total

Percentage (%)

0 ~ 30°

23

21

44

32.1

30° ~ 60°

1

2

3

2.1

60° ~270°

0

0

0

0

270° ~ 300°

1

0

1

0.8

300° ~ 330°

6

23

29

21.2

330° ~ 360°

6

54

60

43.8

Total

37

100

137

100