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
Figure 4 Representation of root canal curvature in different tooth positions and different observation directions. (A–C) Buccolingual direction of premolar (A) straight root canal (category I). (B) Moderately curved root canal (category II). (C) Severely curved root canal (category III). (D, E) Mesiodistal direction of premolar. (D) Straight root canal (category I) and severely curved root canal (category III). (E) Moderately curved root canal (category II). (F, G) Buccolingual direction of molar. (F) Straight root canal (category I) and severely curved root canal (category III). (G) Moderately curved root canal (category II). (H–J) Mesiodistal direction of molar. (H) Straight root canal (category I). (I) Moderately curved root canal (category II). (J) Severely curved root canal (category III).