Morphological Study of Root Canals of Maxillary Molars by Cone-Beam Computed Tomography

Table 1

Scans excluded from the sample, maxillary teeth excluded and included from the sample

Scans excluded from the sample		Number
Scans of the mandible (insufficient FOV)		245
Scans without diagnostic quality		7
Scans of the maxilla in which all first and second molars met one or more exclusion criteria		174
Total		426
Exclusion criteria number		758
Absent		14
Extensive caries		15
Incomplete rhizogenesis		28
Deciduous molars		257
Endodontic treatment		80
Dental implant		14
Root remnant		49
Image artifact		54
Fused roots (MB, DB, and P)		60
Fused roots (MB and DB)		4
Fused roots (MB and P)		17
Fused roots (DB and P)		14
Total		1,350
Maxillary teeth included in the sample
Sex (mean age, years)	Number of scans evaluated	Number of teeth evaluated
Male (47.22)	176	238
Female (47.85)	438	562
Total	414	1,000

MB: mesiobuccal; DB: distobuccal; P: palatal.