Case Report
Copyright ©The Author(s) 2019.
World J Clin Cases. Jan 6, 2019; 7(1): 79-88
Published online Jan 6, 2019. doi: 10.12998/wjcc.v7.i1.79
Table 1 Available case reports of maxillary first molar with fewer root canals and C-shaped root canals
Ref.CountryGenderEthnicityNo. of canalsFeatures of the root canalsTypeSymmetry or not
Newton et al[13]United StatesMaleWhite2Fusion between P and DB canals, and a single MB canalType AN/A
Dankner et al[27]IsraelFemaleWhite3Fusion between P and DB canals, and a single MP canalType AYes
Fava et al[8]BrazilFemaleN/A3Fusion between MB and DB, but with 2 root canal apexes, and a single C-shaped P canalType BN/A
De Moor et al[33]BelgiumFemaleWhite3Fusion between P and DB canals, and single MB, MP canalsType AN/A
De Moor et al[33]BelgiumMaleWhite2Fusion between P and DB canals, and a single MB canalType ANo
Gopikrishna et al[7]IndiaN/A1A single root with 1 root canal/N/A
Yilmaz et al[28]TurkeyFemaleWhite2Fusion between MB and DB canals, but with 3 foramina, and a single P canalType BN/A
Ma et al[24]ChinaFemaleYellow2Fusion between MB and DB canals, and a single P canalType BYes
Kottoor et al[11]IndiaMaleN/A4Fusion between 2 P canals, and single MB, DB canalsType CNo
Martins et al[6]PortugalMaleWhite2Fusion between P and DB canals, and a single MB canalType AYes
Martins et al[6]PortugalFemaleWhite2Fusion between MB and DB canals, and a single P canalType BN/A
Shin et al[29]KoreaMaleYellow1All the roots fuse together into one O-shaped root, but 5–6 root canals with connecting fins at the apical 3mmO-shapedYes
Joshi et al[30]IndiafemaleN/A1A single fused root with a single canal/Yes
Paksefat et al[31]IranfemaleN/A3Fusion between MB and DB canals, and single separate P and MB2 canalsType BNo
Present study (case 1)ChinaFemaleYellow2Fusion between MB and DB canals, and a single P canalType BYes
Present study (case 2)ChinaFemaleYellow2Fusion between MB and DB canals, and a single P canalType BYes