Abstract
A maxillary first molar should be considered a four-canal tooth until proved otherwise; however, a clinician should also be aware of the possibility of the presence of C-shaped root canal configuration with or without possibility of splitting into two or three canals. The two clinical cases reported in this paper describe the endodontic treatment of two maxillary first molars, on the same patient, with uncommon anatomy: the first case is about a maxillary first molar with only one C-shaped root and one oval canal with a large buccolingual diameter, a C1 type according to Fan's classification; the second case, about the contralateral maxillary first molar, is probably the first case documented of a maxillary first molar with a C-shaped root canal and C-shaped root with complete fusion of the three roots, having a C3 configuration.
Highlights
Human maxillary first molars are usually considered as three-rooted teeth with four root canals for the presence of a second canal in the MB root (MB2)
The two clinical cases reported below describe the endodontic treatment of two maxillary first molars, on the same patient, with uncommon anatomy: the first case is about a maxillary first molar with only one C-shaped root and one oval canal with a large buccolingual diameter, a C1 type according to Fan’s classification [13]; the second case is about the contralateral maxillary first molar with a C-shaped root and 3 root canals, a C3 type according to Fan’s classification
After a careful study of the preoperative radiographs, the cementoenamel junction (CEJ) was identified by performing a circumferential probing with a periodontal probe
Summary
Human maxillary first molars are usually considered as three-rooted teeth with four root canals for the presence of a second canal in the MB root (MB2). A maxillary first molar is the tooth with the wider range of anatomical variations [5, 6] Many of these anatomical variations are confirmed in literature, and the incidence of four root canals in three roots for the presence of MB2 ranges from 25% to 96.1% [3, 7]. Genetic malformation, whereas taurodont root morphology has been found to occur as an isolated trait with familial tendency or as a feature in a wide variety of multiplesystem malformation syndromes, and it does not exhibit any cross-section of the canal that belongs to the C1, C2, or C3 configuration. The two clinical cases reported below describe the endodontic treatment of two maxillary first molars, on the same patient, with uncommon anatomy: the first case is about a maxillary first molar with only one C-shaped root and one oval canal with a large buccolingual diameter, a C1 type according to Fan’s classification [13]; the second case is about the contralateral maxillary first molar with a C-shaped root and 3 root canals, a C3 type according to Fan’s classification
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
