In this case report, we present a maxillary first molar with six canals. A 40-year-old male patient was referred for non-surgical root canal therapy of tooth 16. Under magnification of a surgical operating microscope, a unique morphology with double canal systems in each root was identified. The morphology was characterized by a single palatal root with two canals joining in the apical third, two mesiobuccal canals, and two distobuccal canals with one orifice and two separate foramina.
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aSchool of Dentistry, National Yang-Ming University, Taipei, Taiwan
bDepartment of Dentistry, Taipei City Hospital, Taipei, Taiwan
cNational Yang-Ming University, Clinical and Educational Center of Dentistry, Taipei, Taiwan
dDepartment of Stomatology, Division of Endodontics and Periodontology, Taipei Veterans General Hospital, Taipei, Taiwan
Corresponding author. Department of Stomatology, Division of Endodontics and Periodontology, Taipei Veterans General Hospital, 201, Shih-Pai Road, Section 2, Taipei 11217, Taiwan
ABSTRACT