13 January 2021: Clinical Research
Analysis of Root Canal Curvature and Root Canal Morphology of Maxillary Posterior Teeth in Guizhou, China
Xin Qiao 123CDEF , Tingting Xu 4BC , Liang Chen 123D , Deqin Yang 123AG*DOI: 10.12659/MSM.928758
Med Sci Monit 2021; 27:e928758
Table 1 Root canal curvature of maxillary premolar.
| Tooth position | Number of root canal | Mesiodistal direction | Buccolingual direction | t test | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Category I | Category II | Category III | Maximum (degree) | X±S (degree) | Category I | Category II | Category III | Maximum (degree) | ‘X±S (degree) | t value | P value | |||
| First premolar | Double root canal (113) | B | 34 | 73 | 6 | 26.45 | 8.73±6.56 | 37 | 71 | 5 | 25.82 | 7.63±6.06 | 1.508 | 0.134 |
| P | 37 | 73 | 3 | 23.96 | 7.73±5.30 | 31 | 73 | 9 | 34.58 | 9.42±7.16 | −2.01 | 0.047 | ||
| Single root canal (12) | 4 | 8 | 0 | 16.91 | 5.72±5.19 | 5 | 7 | 0 | 16.33 | 7.18±4.70 | −0.723 | 0.477 | ||
| Second premolar | Double root canal (22) | B | 10 | 34 | 3 | 37.97 | 10.27±7.51 | 9 | 31 | 7 | 27.19 | 11.78±7.62 | −1.051 | 0.299 |
| P | 8 | 11 | 3 | 26.85 | 9.2±7.57 | 2 | 17 | 3 | 33.48 | 12.71±7.7 | −1.838 | 0.08 | ||
| Single root canal (25) | 3 | 20 | 2 | 31.96 | 9.19±5.72 | 4 | 20 | 1 | 22.21 | 10.35±6.59 | −0.665 | 0.509 | ||
| B – buccal root canal; P – palatal root canal. | ||||||||||||||