Evaluation of root and canal morphology of mandibular premolar amongst Saudi subpopulation using the new system of classification: a CBCT study

Table 1 Distribution of root and root canal morphology of mandibular premolars

Classification	Left 1st PM		Right 1st PM		Left 2nd PM		Right 2nd PM		Overall
Classification	n	%	n	%	n	%	n	%	n (%)
¹ PM ¹	262	40.62	264	40.93	278	47.52	283	48.38	1087 (88.37)
² PM ¹ B ¹ L ¹	21	3.25	21	3.25	1	0.17	1	0.17	44 (3.5)
² PM B ¹ L ¹	3	0.46	3	0.46	2	0.34			8 (0.65)
¹ PM ^1–2−1	18	2.79	16	2.49	2	0.34	2	0.34	38 (3.08)
¹ PM ^1–2	18	2.79	16	2.49	3	0.51	2	0.34	39 (3.17)
¹ PM ^{1–2−1–2}	1	0.15	2	0.32					3 (0.24)
³ PMMB ¹ DB ¹ L¹					3	0.51	3	0.51	6 (0.48)
C-Shaped canals					3	0.51	2	0.34	5 (0.40)
Total	323	50.06	322	49.94	292	49.9	293	50.1	1230 (100)

ISSN: 1472-6831