Middle distal canal of the mandibular first molar: a case report and literature review

Abstract

* Clinicians should be aware of the variable root canal anatomy in the distal root of mandibular first molars. * Use of magnification helps to identify and locate additional root canals. * Three root canals in the distal root of mandibular first molar teeth might occur.

Endodontic Management and Cone-beam Computed Tomography Evaluation of Seven Maxillary and Mandibular Molars with Single Roots and Single Canals in a Patient

“…Unusual anatomical and morphologic variations such as the existence of additional supernumerary roots and root canals are remarkable features that have been described in several studies in maxillary (11)(12)(13) and mandibular (14)(15)(16) molars.…”

Maxillary and mandibular first molar with five root canals diagnosed with cone-beam computed tomography: A review and two case reports

“…Likewise mandibular first molar also shows variation in normal root canal anatomy. Endodontic management of a mandibular first molar in a patient of Indian origin, having three distal canals within a single distal root has been described 16 . A mandibular first molar with three distal canals was first reported by Berthiaume et al however three distal canals ended in separate apical foramina,have also been described 17 .…”

Endodontic Management of Radix Entomolaris: Case Report.

“…because of high frequency in these populations, Radix entomolaris is considered normal( eumorphic root morphology). In caucasians radix entomolaris is not common with maximum occurence from 3.4% to 4.2% 8,13. In eumorphic roots, racial genetic factors influenced the deepest expression of a particular gene which results in the most accentuates phenotypic manifestation 14,15 . Curzon suggested that a 'molar of roots' has a hight degree of genetic trace penetrance; its domain reflected in the fact of which the prevelance was similar in pure Eskimos and in misture of Eskimos and Caucasians.…”