18 August 2020 : Clinical Research
Root Anatomy and Root Canal Morphology of Maxillary Second Permanent Molars in a Chongqing Population: A Cone-Beam Computed Tomography Study
Yu Xia123CDEF, Xin Qiao123BC, Ya-jing Huang123CD, Yue-heng Li123AE*, Zhi Zhou123AGDOI: 10.12659/MSM.922794
Med Sci Monit 2020; 26:e922794
Table 2 Numbers of root canals.
| Left side (n/%) | Right side (n/%) | Fisher value | P | Male (n/%) | Female (n/%) | Fisher value | P | Total (n/%) | |
|---|---|---|---|---|---|---|---|---|---|
| Single root canal | 1 (0.50%) | 4 (2.00%) | 2.533 | 0.471 | 2 (1.16%) | 3 (1.32%) | 6.436 | 0.085 | 5 (1.25%) |
| Two root canals | 24 (12.00%) | 21 (10.50%) | 16 (9.30%) | 29 (12.72%) | 44 (11.25%) | ||||
| Three root canals | 120 (60.00%) | 127 (63.50%) | 99 (57.56%) | 148 (64.91%) | 247 (61.75%) | ||||
| Four root canals | 55 (27.50%) | 48 (24.00%) | 55 (31.98%) | 48 (21.05%) | 103 (25.75%) | ||||
| Total | 200 (100%) | 200 (100%) | – | – | 172 (100%) | 228 (100%) | 400 (100%) |