13 January 2021 : Clinical Research
Analysis of Root Canal Curvature and Root Canal Morphology of Maxillary Posterior Teeth in Guizhou, China
Xin Qiao123CDEF, Tingting Xu4BC, Liang Chen123D, Deqin Yang123AG*DOI: 10.12659/MSM.928758
Med Sci Monit 2021; 27:e928758
Table 2 Root canal curvature of maxillary molar.
| Tooth position | Number of root canal | Mesiodistal direction | Buccolingual direction | t test | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type I | Type II | Type III | Maximum (degree) | X±S (degree) | Type I | Type II | Type III | Maximum (degree) | ‘X±S (degree) | t value | P value | ||
| First molar | MB (64) | 2 | 31 | 32 | 35.95 | 20.84±7.16 | 5 | 59 | 1 | 30.66 | 11.33±6.53 | 3.755 | 0.001 |
| MB2 (21) | 0 | 16 | 5 | 27.33 | 25.16±6.6 | 1 | 19 | 1 | 22.68 | 11.05±6.08 | 6.418 | 0 | |
| DB (64) | 4 | 56 | 4 | 25.48 | 13.75±6.65 | 13 | 51 | 0 | 15.62 | 6.87±5.13 | 6.291 | 0 | |
| P (64) | 21 | 43 | 1 | 21.41 | 9.92±7.67 | 7 | 55 | 3 | 24.96 | 4.30±4.35 | 5.197 | 0 | |
| Second molar | MB (38) | 2 | 19 | 20 | 48.06 | 19.48±9.64 | 7 | 27 | 7 | 33.72 | 10.97±8.34 | 5.722 | 0 |
| MB2 (2) | 0 | 0 | 2 | 34.16 | 28.05±8.65 | 0 | 2 | 0 | 16.32 | 11.02±7.5 | 1.491 | 0.376 | |
| DB (38) | 1 | 34 | 6 | 29.95 | 13.36±6.35 | 12 | 29 | 0 | 18.11 | 7.81±5.91 | 4.592 | 0 | |
| P (38) | 22 | 19 | 0 | 17.68 | 9.12±7.98 | 16 | 20 | 5 | 24.55 | 4.42±4.77 | 3.111 | 0.003 | |
| P – palatal root canal; MB – mesiobuccal root canal; MB2 – the second mesiobuccal root canal; DB – distobuccal root canal. | |||||||||||||