Visual inspection of root patterns and radiographic estimation of its canal configurations by confirmation using sectioning method. An ex vivo study on maxillary first premolar teeth

Table 1 The frequency distribution and percentage of the root numbers of maxillary permanent first premolars in a sample of the Sulaimani population

No. of root	No. of tooth	Types of the root morphology	No. of tooth	(n) %
Single-rooted	42	Single-tipped root apex (a)	2	1.40	29.57
Single-rooted	42	Double-tipped root apex (b)	40	28.17	29.57
Double-rooted	97	Fused two roots (c)	34	23.94	68.31
Double-rooted	97	Separate two roots (d)	63	44.37	68.31
Three-rooted	3	Three roots (e)	3	2.12
Total			142	100%

ISSN: 1472-6831