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Table 5 Types of relationships between the maxillary molar roots and the maxillary sinus floor

From: Investigating the anatomical relationship between the maxillary molars and the sinus floor in a Chinese population using cone-beam computed tomography

tooth position

n

Type I

Type II

Type III

Type IV

Type V

16

200

105 (52.5%)

47 (23.5%)

18 (9%)

17 (8.5%)

13 (6.5%)

17

200

120 (60%)

43 (21.5%)

27 (13.5%)

3 (1.5%)

7 (3.5%)

26

200

108 (54%)

56 (28%)

12 (6%)

12 (6%)

15 (7.5%)

27

200

124 (62%)

28 (14%)

32 (16%)

4 (2%)

10 (5%)

sum

800

457 (57.125%)

174 (21.75%)

89 (11.13%)

36 (4.5%)

45 (5.6%)

  1. Tooth position 16 represents the right first molar, 17 represents the right second molar, 26 represents left first molar, and 27 represents left second molar
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BMC Oral Health

ISSN: 1472-6831

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