24 September 2020>: Clinical Research
Evaluation of the Relationship Between Maxillary Sinus Wall and Maxillary Canines and Posterior Teeth Using Cone-Beam Computed Tomography
Yifei Qin 1ABCDEF , Guang Shu 1AB , Tianmin Xu 2ADEG*DOI: 10.12659/MSM.925384
Med Sci Monit 2020; 26:e925384
Table 5 Frequencies and distances (mm) of type NC in the maxillary canines and posterior teeth by age and sex.
10–19 | 20–29 | 30–47 | P | Female | Male | P | Total | |
---|---|---|---|---|---|---|---|---|
Canine | ||||||||
n (%) | 179 (69.1%) | 199 (81.6%) | 108 (87.1%) | 0.000 | 322 (79.7%) | 164 (73.5%) | 0.568 | 486 (77.5%) |
Mean (SD) | 4.5 (2.7) | 5.7 (3.5) | 6.9 (3.7) | 0.000 | 5.8 (3.5) | 5.0 (3.2) | 0.487 | 5.5 (3.4) |
1PM | ||||||||
n (%) | 162 (61.4%) | 169 (69.3%) | 105 (83.3%) | 0.000 | 294 (71.7%) | 142 (63.4%) | 0.302 | 436 (68.8%) |
Mean (SD) | 3.5 (1.9) | 4.6 (3.3) | 6.6 (3.7) | 0.000 | 4.9 (3.4) | 4.2 (2.7) | 0.752 | 4.7 (3.2) |
2PM | ||||||||
n (%) | 69 (26.1%) | 90 (36.9%) | 72 (57.1%) | 0.000 | 173 (42.2%) | 58 (25.9%) | 0.005 | 231 (36.4%) |
Mean (SD) | 2.2 (1.5) | 4.1 (3.0) | 4.6 (3.2) | 0.000 | 3.7 (2.8) | 3.6 (3.2) | 0.179 | 3.7 (2.9) |
1M MB | ||||||||
n (%) | 14 (5.3%) | 51 (20.9%) | 53 (42.1%) | 0.000 | 91 (22.2%) | 27 (12.1%) | 0.164 | 118 (18.6%) |
Mean (SD) | 2.2 (1.0) | 3.5 (2.6) | 4.4 (3.2) | 0.002 | 3.6 (2.7) | 4.3 (3.2) | 0.038 | 3.7 (2.9) |
1M DB | ||||||||
n (%) | 16 (6.1%) | 54 (22.1%) | 53 (42.1%) | 0.000 | 91 (22.2%) | 32 (14.3%) | 0.555 | 123 (19.4%) |
Mean (SD) | 2.3 (1.5) | 3.3 (2.2) | 4.4 (3.0) | 0.001 | 3.6 (2.4) | 3.8 (3.2) | 0.14 | 3.6 (2.6) |
1M P | ||||||||
n (%) | 22 (8.3%) | 56 (23.0%) | 47 (37.3%) | 0.000 | 90 (22.0%) | 35 (15.6%) | 0.722 | 125 (19.7%) |
Mean (SD) | 2.6 (1.5) | 3.7 (2.3) | 4.4 (2.9) | 0.002 | 3.7 (2.4) | 3.9 (2.8) | 0.179 | 3.8 (2.5) |
2M | ||||||||
n (%) | 9 (3.4%) | 22 (9.0%) | 35 (27.8%) | 0.000 | 49 (12.0%) | 17 (7.6%) | 0.754 | 66 (10.4%) |
Mean (SD) | 1.7 (1.2) | 3.3 (1.9) | 3.4 (2.6) | 0.062 | 3.1 (1.9) | 3.3 (3.3) | 0.393 | 3.1 (2.3) |
SD – standard deviation; 1PM – first premolars; 2PM – second premolars; 1M MB – first molar mesiobuccal roots; 1M DB – first molar distobuccal roots; 1M P – first molar palatal roots; 2M – the second molars. |