Mandibular first molars with three mesial canals.

Gen Dent

Endodontic Section, Atlantic Coast Dental Research Clinic, Lake Worth, Florida, USA.

Published: April 2004

Five clinical cases demonstrate the presence of a middle mesial canal in the mandibular first permanent molar. This is not an extra canal but rather the sequelae of instrumenting the isthmus between the mesiobuccal and mesiolingual canals.

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