Cone-Beam Computed Tomography Assessment of Prevalence of Procedural Errors in Maxillary Posterior Teeth

Table 1

Procedural errors in maxillary premolar teeth.

Tooth	Maxillary first; premolars ()		Maxillary second; premolars ()
Root canal	P	B	P	B	Single canal
Root fracture	2 (6.9%)	1 (3.4%)	0	0	0
Apical perforation	1 (3.4%)	0	0	2 (9.5%)	0
Strip perforations (with extrusion of material into the furcation area)	0	0	0	0	0
Broken instrument	1 (3.4%)	1 (3.4%)	0	1 (4.8%)	0
Missed canal	2 (6.9%)	0	7 (33.3%)	0	0
Underfilled	14 (48.3%)	6 (20.7%)	0	4 (1.0%)	0
Overfilled	0	1 (3.4%)	0	0	7 (33.3%)

P = palatal; B = buccal.