Prevalence of Missed Canals and Their Association with Apical Periodontitis in Posterior Endodontically Treated Teeth: A CBCT Study

Table 1

Prevalence of apical periodontitis and missed canals among endodontically treated teeth.

	Apical periodontitis		Missed treated canals
	Yes	No	Yes	No
Maxillary teeth (N = 89)
First premolars (N = 22)	12 (54.5)	10 (45.5)	3 (13.6)	19 (86.4)
Second premolars (N = 23)	18 (78.3)	5 (21.7)	1 (4.3)	22 (95.7)
First molars (N = 32)	25 (78.1)	7 (21.9)	13 (40.6)	19 (59.4)
Second molars (N = 12)	10 (83.3)	2 (16.7)	2 (16.7)	10 (83.3)
Total	65 (73.0)	24 (27.0)	19 (21.3)	70 (78.7)
Mandibular teeth (N = 76)
First premolars (N = 2)	1 (50.0)	1 (50.0)	0 (0.0)	2 (100.0)
Second premolars (N = 13)	6 (46.2)	7 (53.8)	0 (0.0)	13 (100.0)
First molars (N = 44)	39 (88.6)	5 (11.4)	11 (25.0)	33 (75.0)
Second molars (N = 17)	12 (70.6)	5 (29.4)	0 (0.0)	17 (100.0)
Total	58 (76.3)	18 (23.7)	11 (14.5)	65 (85.5)