Endodontic management of the maxillary first molars with two root canals: A case report and review of the literature

Table 1 Available case reports of maxillary first molar with fewer root canals and C-shaped root canals

Ref.	Country	Gender	Ethnicity	No. of canals	Features of the root canals	Type	Symmetry or not
Newton et al[13]	United States	Male	White	2	Fusion between P and DB canals, and a single MB canal	Type A	N/A
Dankner et al[27]	Israel	Female	White	3	Fusion between P and DB canals, and a single MP canal	Type A	Yes
Fava et al[8]	Brazil	Female	N/A	3	Fusion between MB and DB, but with 2 root canal apexes, and a single C-shaped P canal	Type B	N/A
De Moor et al[33]	Belgium	Female	White	3	Fusion between P and DB canals, and single MB, MP canals	Type A	N/A
De Moor et al[33]	Belgium	Male	White	2	Fusion between P and DB canals, and a single MB canal	Type A	No
Gopikrishna et al[7]	India		N/A	1	A single root with 1 root canal	/	N/A
Yilmaz et al[28]	Turkey	Female	White	2	Fusion between MB and DB canals, but with 3 foramina, and a single P canal	Type B	N/A
Ma et al[24]	China	Female	Yellow	2	Fusion between MB and DB canals, and a single P canal	Type B	Yes
Kottoor et al[11]	India	Male	N/A	4	Fusion between 2 P canals, and single MB, DB canals	Type C	No
Martins et al[6]	Portugal	Male	White	2	Fusion between P and DB canals, and a single MB canal	Type A	Yes
Martins et al[6]	Portugal	Female	White	2	Fusion between MB and DB canals, and a single P canal	Type B	N/A
Shin et al[29]	Korea	Male	Yellow	1	All the roots fuse together into one O-shaped root, but 5–6 root canals with connecting fins at the apical 3mm	O-shaped	Yes
Joshi et al[30]	India	female	N/A	1	A single fused root with a single canal	/	Yes
Paksefat et al[31]	Iran	female	N/A	3	Fusion between MB and DB canals, and single separate P and MB2 canals	Type B	No
Present study (case 1)	China	Female	Yellow	2	Fusion between MB and DB canals, and a single P canal	Type B	Yes
Present study (case 2)	China	Female	Yellow	2	Fusion between MB and DB canals, and a single P canal	Type B	Yes

DB: Distobuccal; MB: Mesiobuccal; N/A: Not available; P: Palatal.